Inside Out Beauty: How Your Plate and Skincare Routine Connect

Inside Out Beauty: How Your Plate and Skincare Routine Connect

Your skin reflects what you eat, how you sleep, and how you care for yourself. While the perfect serum might smooth a few lines, lasting radiance comes from a deeper partnership between your plate and your skincare routine. Understanding this connection helps you make choices that support healthy skin from both directions.

The Science Behind Skin and Nutrition

Your skin is your body’s largest organ, and it demands significant nutritional resources. Every 28 days, your epidermis completely renews itself, requiring building blocks like proteins, lipids, and micronutrients. When your diet lacks these essentials, your skin shows it through dryness, dullness, premature aging, or increased sensitivity.

Blood vessels deliver nutrients directly to the dermis, the deeper layer where collagen and elastin form. This vascular network means that what circulates in your bloodstream reaches your skin cells within hours. A meal rich in antioxidants can begin protecting skin cells from oxidative stress almost immediately, while inflammatory foods can trigger skin reactions just as quickly.

The skin barrier, your outermost protective layer, relies heavily on essential fatty acids. These lipids seal moisture within skin cells and block irritants from entering. Without adequate omega-3 and omega-6 fatty acids, this barrier weakens, leading to transepidermal water loss and increased vulnerability to environmental damage.

Key Nutrients That Support Skin Health

Certain vitamins and minerals play starring roles in skin function. Vitamin C serves as both an antioxidant and a cofactor in collagen synthesis. Your body cannot produce collagen without it, making adequate intake essential for maintaining skin firmness. Citrus fruits, bell peppers, strawberries, and broccoli provide concentrated sources.

Vitamin E works alongside vitamin C to protect cell membranes from oxidative damage. This fat-soluble antioxidant accumulates in the skin’s outer layers, where it absorbs UV radiation and neutralizes free radicals. Almonds, sunflower seeds, avocado, and olive oil deliver substantial amounts.

Vitamin A, particularly in the form of beta-carotene, supports skin cell turnover and repair. Orange and yellow vegetables like carrots, sweet potatoes, and winter squash contain high levels. The body converts beta-carotene to retinol as needed, providing a steady supply for skin maintenance.

Zinc regulates oil production and supports wound healing. This mineral also helps maintain the skin barrier integrity. Pumpkin seeds, oysters, legumes, and whole grains offer reliable zinc sources.

Selenium protects against UV-induced damage and helps preserve skin elasticity. Brazil nuts contain remarkable concentrations, with just one or two providing your daily requirement. Fish, eggs, and brown rice also contribute meaningful amounts.

Anti-Inflammatory Foods for Clearer Complexion

Chronic inflammation drives many common skin concerns, including acne, rosacea, and premature aging. When inflammatory markers circulate at elevated levels, they break down collagen, increase oil production, and trigger skin sensitivity. An anti-inflammatory eating pattern directly addresses these mechanisms.

Fatty fish like salmon, mackerel, and sardines provide omega-3 fatty acids that actively resolve inflammation. These specialized compounds signal immune cells to stop producing inflammatory chemicals. Aim for two to three servings per week to maintain adequate levels.

Colorful vegetables and fruits supply polyphenols, plant compounds with documented anti-inflammatory effects. Berries contain anthocyanins that reduce inflammatory signaling. Leafy greens provide flavonoids that calm skin irritation. Tomatoes offer lycopene, which protects against sun-induced inflammation.

Herbs and spices add concentrated anti-inflammatory compounds to meals. Turmeric contains curcumin, which research shows reduces inflammatory markers throughout the body. Ginger, rosemary, and cinnamon offer similar benefits. Using these liberally in cooking supports systemic inflammation reduction.

Conversely, certain foods promote inflammation. Refined sugars cause rapid blood glucose spikes that trigger inflammatory cascades. Processed meats contain advanced glycation end products that directly damage skin proteins. Limiting these foods provides noticeable improvements for many people within weeks.

Hydration and Skin Moisture Connection

While topical moisturizers seal hydration into your skin, adequate water intake supplies the moisture in the first place. Your skin cells require water to maintain their plump, smooth structure. When systemic dehydration occurs, your body prioritizes vital organs over skin, leaving your complexion lackluster and your fine lines more pronounced.

Plain water remains the most efficient hydrator. Herbal teas contribute similarly, while offering additional antioxidants. Fruits and vegetables with high water content, such as watermelon, cucumber, and oranges, provide hydration alongside nutrients.

Hydrating foods often contain electrolytes that help your cells retain fluid. Potassium from bananas and sweet potatoes, magnesium from dark chocolate and leafy greens, and sodium from moderate salt use all support proper fluid balance. This cellular hydration reflects in smoother, more elastic skin.

Alcohol and excessive caffeine act as diuretics, promoting fluid loss. While moderate coffee consumption offers antioxidant benefits, excessive intake can compromise skin hydration. Similarly, alcohol dehydrates skin cells and dilates blood vessels, often visible as facial redness and puffiness.

Gut Health and the Skin Microbiome

The gut-skin axis describes the bidirectional communication between your digestive system and your skin. Your intestinal microbiome influences systemic inflammation, hormone metabolism, and nutrient absorption. When gut bacteria become imbalanced, skin often shows the effects.

Fermented foods introduce beneficial bacteria to your digestive system. Yogurt with active cultures, kefir, sauerkraut, kimchi, and kombucha contain diverse probiotic strains. Regular consumption helps maintain gut microbiome diversity.

Prebiotic fiber feeds your existing beneficial bacteria. Garlic, onions, leeks, asparagus, bananas, and whole grains provide inulin and other prebiotic compounds. This fiber also supports regular elimination, preventing toxin recirculation that can affect skin clarity.

Some people notice clear connections between specific foods and skin reactions. Dairy, gluten, and high-glycemic foods trigger acne in susceptible individuals. Keeping a food and skin journal helps identify personal triggers, allowing targeted dietary adjustments.

Building an Inside-Out Skincare Routine

Effective skincare addresses the same concerns from both directions. For dryness, internal hydration and omega-3s complement ceramide-rich moisturizers. For aging, dietary antioxidants work alongside topical retinoids and vitamin C serums. For sensitivity, an anti-inflammatory diet pairs with barrier-repairing skincare.

Begin by assessing your primary skin concerns. Each relates to specific nutritional factors. Acne often responds to lower glycemic eating patterns and adequate zinc intake. Dullness typically improves with increased antioxidant consumption and hydration. Redness frequently diminishes with omega-3 supplementation and anti-inflammatory foods.

Plan meals that intentionally include skin-supporting foods. A breakfast of Greek yogurt with berries and almonds provides protein, probiotics, and antioxidants. Lunch might feature a salmon and avocado salad on leafy greens. Dinner could include roasted vegetables with herbs and olive oil. Snacks of pumpkin seeds and dark chocolate offer zinc and antioxidants.

Time your eating patterns to support circadian rhythms. Late-night eating disrupts sleep quality, and poor sleep accelerates skin aging. Aim for your last meal at least three hours before bedtime, allowing your body to focus on repair during sleep.

Complementary Topical Ingredients and Foods

Certain nutrients work best when applied topically and consumed simultaneously. Vitamin C, for example, provides more comprehensive antioxidant protection when you eat vitamin C-rich foods and apply vitamin C serum. The internal supply supports collagen production throughout the body, while the topical application concentrates protection in facial skin.

Vitamin E shows similar synergy. Dietary sources maintain cell membrane health throughout your body, while topical vitamin E provides targeted barrier support. This combination approach addresses both immediate skin surface needs and long-term cellular health.

Omega fatty acids from fish or plant sources nourish skin cells internally. Meanwhile, skincare products containing ceramides, fatty acids, and cholesterol reinforce the external barrier. This inside-out combination proves particularly effective for dry, compromised skin.

Retinol, a vitamin A derivative, represents a special case. While dietary vitamin A supports overall skin health, topical retinoids provide prescription-strength benefits for acne and aging that dietary sources cannot match. Both approaches serve important functions in a comprehensive skincare strategy.

Sustainable Habits for Lasting Results

Skin transformation requires patience. The 28-day skin cell turnover cycle means dietary changes need four to six weeks before showing visible results. Collagen remodeling, which addresses deeper concerns like fine lines and elasticity, takes months of consistent support.

Rather than dramatic dietary overhauls, focus on sustainable additions. Adding one serving of fatty fish weekly, including vegetables at every meal, and swapping water for sugary drinks build habits that last. These small changes accumulate into significant nutritional improvements.

Protecting your skin from sun damage remains essential regardless of diet. UV radiation causes approximately 80 percent of visible skin aging. Daily sunscreen use prevents far more damage than any nutritional intervention can repair. Apply broad-spectrum SPF 30 or higher every morning, regardless of weather.

Sleep, stress management, and exercise complement your inside-out approach. Poor sleep elevates cortisol, which breaks down collagen. Chronic stress triggers inflammatory pathways. Regular exercise improves circulation, delivering nutrients to skin cells. These lifestyle factors work alongside diet and skincare to support healthy skin.

Timing Your Nutrition for Optimal Skin Repair

Your skin follows a circadian rhythm that influences when it absorbs nutrients most efficiently and when cellular repair peaks. Understanding these cycles allows you to time your eating and skincare application for maximum benefit. During the day, skin cells focus on protection, ramping up antioxidant activity and thickening the outer barrier in anticipation of UV exposure. At night, they shift toward regeneration, producing collagen and repairing damage.

Front-loading your antioxidant intake earlier in the day aligns with your skin’s protective phase. A breakfast rich in vitamin C from citrus or berries, combined with vitamin E from nuts or avocado, provides resources your skin needs during peak daylight hours. This timing ensures these compounds are circulating when your skin faces the greatest oxidative stress from UV radiation and pollution.

Evening meals benefit skin by supplying building blocks for overnight repair. Protein at dinner provides amino acids your body uses to synthesize collagen while you sleep. Foods rich in zinc and vitamin A support the cell turnover that accelerates during rest. A dinner featuring salmon, sweet potatoes, and leafy greens delivers these nutrients when your skin is primed to use them.

Intermittent fasting has gained attention for potential skin benefits. Some research suggests that extended overnight fasting periods of 12 to 16 hours allow cellular cleanup processes called autophagy to remove damaged proteins and organelles. While studies remain preliminary, many people report clearer skin when they consolidate eating into a shorter daily window. The key is maintaining adequate nutrition during your eating period rather than simply restricting calories.

Late-night eating disrupts skin repair in multiple ways. Digestion elevates body temperature slightly, which can interfere with the deep sleep phases when growth hormone peaks and tissue repair occurs. Blood flow diverted to the digestive system means less circulation to the skin. If evening hunger strikes, opt for a small amount of protein or healthy fat rather than carbohydrates, which can spike insulin and interfere with sleep quality.

Seasonal Adjustments for Your Inside-Out Routine

Your skin faces different challenges throughout the year, and your nutritional approach should adapt accordingly. Winter brings cold, dry air that strips moisture from your skin barrier, while summer increases UV exposure and sweat-related irritation. Seasonal eating naturally provides many of the nutrients your skin needs during each period, but conscious adjustments can fill gaps.

During winter months, increase your intake of omega-3 fatty acids and vitamin D. Cold weather and indoor heating deplete skin lipids, making your barrier more vulnerable. Fatty fish, walnuts, and flaxseeds help replenish these fats internally. Many people’s vitamin D levels drop in winter due to reduced sun exposure, and this deficiency can manifest as dry, itchy skin. Consider vitamin D-rich foods like fortified dairy, egg yolks, and mushrooms, or discuss supplementation with a healthcare provider.

Winter also calls for extra attention to foods that support the skin barrier. Bone broth provides collagen peptides and amino acids like glycine and proline that your body uses to maintain connective tissue. Soups and stews featuring root vegetables deliver beta-carotene and vitamin C. The warmth of cooked foods during cold months supports circulation, ensuring nutrients reach skin cells efficiently.

Summer shifts the focus toward antioxidant protection and anti-inflammatory foods. Increased sun exposure generates free radicals that damage skin cells and accelerate aging. Loading up on lycopene-rich tomatoes, watermelon, and pink grapefruit provides natural photoprotection, reducing sunburn severity by up to 50 percent in some studies. Green tea, berries, and dark chocolate contribute additional antioxidants that reinforce your skin’s defense systems.

Hot weather increases sweating, which can lead to mineral loss through perspiration. Replenishing electrolytes becomes important for maintaining cellular hydration. Coconut water, bananas, and leafy greens supply potassium. A pinch of quality salt on summer meals provides sodium. Magnesium from nuts, seeds, and dark chocolate supports hundreds of cellular processes and helps your skin retain moisture.

Seasonal transitions, particularly spring and fall, often trigger skin sensitivity as humidity and temperature fluctuate. During these periods, emphasize anti-inflammatory foods to calm reactive skin. Turmeric, ginger, and omega-3s help stabilize mast cells that release histamine. Gradually shifting your diet with the seasons, rather than making abrupt changes, allows your skin to adjust more smoothly.

The Overlooked Role of Protein in Skin Structure

Collagen receives significant attention in skincare discussions, but the broader role of dietary protein in skin health often goes underappreciated. Your skin is approximately 70 percent protein by dry weight, consisting primarily of collagen, elastin, and keratin. Every structure that gives skin its strength, elasticity, and texture depends on adequate amino acid supply from your diet.

Complete proteins from animal sources provide all nine essential amino acids your body cannot produce. Eggs, fish, poultry, and dairy offer highly bioavailable protein that your skin can readily use. For plant-based eaters, combining complementary proteins throughout the day ensures adequate intake. Rice and beans, hummus and whole grain pita, or oatmeal with nut butter create complete amino acid profiles.

Glycine and proline, two amino acids particularly abundant in collagen, are conditionally essential. Your body can produce them, but during times of stress, rapid growth, or intensive repair, dietary sources become important. Bone broth, gelatin, and collagen peptides provide concentrated amounts. Studies suggest that hydrolyzed collagen supplements can improve skin hydration and elasticity after eight to twelve weeks of consistent use, likely because they deliver these specific amino acids in an easily absorbed form.

Protein timing also influences skin repair. Your body cannot store excess amino acids for later use, making consistent intake throughout the day more effective than concentrating protein at one meal. Including protein at breakfast, lunch, and dinner maintains a steady supply for ongoing collagen synthesis and cellular repair. This approach also stabilizes blood sugar, preventing the insulin spikes that can accelerate skin aging through glycation.

Insufficient protein intake manifests in the skin through multiple pathways. Wound healing slows when the body lacks building blocks for tissue repair. Hair and nails become brittle. Skin loses firmness as collagen production declines. Adults should aim for at least 0.8 grams of protein per kilogram of body weight daily, with higher amounts beneficial during periods of active skin repair or recovery from procedures.

Hormones, Diet, and Your Complexion

Hormonal fluctuations drive many skin concerns, from teenage acne to adult hormonal breakouts and perimenopausal changes. While you cannot entirely control hormone levels through diet, certain foods influence hormone production, metabolism, and elimination in ways that affect your complexion.

Insulin and insulin-like growth factor-1 (IGF-1) significantly impact skin behavior. These hormones increase sebum production and stimulate skin cell proliferation, contributing to clogged pores and acne. High-glycemic foods that spike blood sugar also spike insulin and IGF-1. Conversely, a lower-glycemic eating pattern that emphasizes fiber-rich carbohydrates, adequate protein, and healthy fats keeps these hormones more stable, often improving acne within weeks.

Dairy products contain naturally occurring hormones, including IGF-1, and can influence human hormone levels. Some studies link milk consumption, particularly skim milk, to increased acne severity. The mechanism remains unclear but may involve both hormones and milk proteins. If you suspect dairy affects your skin, try eliminating it for four to six weeks while maintaining adequate calcium and vitamin D from other sources.

Phytoestrogens in soy products offer complex effects on hormone-sensitive skin. These plant compounds can bind to estrogen receptors, producing weak estrogenic or anti-estrogenic effects depending on your hormonal status. During perimenopause, when estrogen declines, soy foods may help maintain skin thickness and moisture. For those with hormonally driven acne, soy’s effects are variable and require individual experimentation.

Fiber plays an underappreciated role in hormone balance. After hormones complete their signaling functions, the liver processes them for elimination through bile into the digestive tract. Adequate fiber ensures regular elimination, preventing hormones from being reabsorbed into circulation. This is particularly relevant for estrogen dominance, which can manifest as cyclic hormonal breakouts. Flaxseeds contain both fiber and lignans that support healthy estrogen metabolism.

Omega-3 fatty acids influence prostaglandin production, locally acting hormones that mediate inflammation. Higher omega-3 intake shifts prostaglandin balance toward anti-inflammatory rather than pro-inflammatory compounds. This shift can reduce the inflammatory component of hormonal acne and decrease skin sensitivity during the luteal phase of the menstrual cycle, when many women experience premenstrual flares.

Chronic stress elevates cortisol, which directly affects skin through multiple pathways. Cortisol breaks down collagen, impairs barrier function, and increases oil production. While stress management extends beyond diet, certain nutrients support adrenal function and cortisol regulation. Vitamin C, magnesium, and B vitamins help modulate stress response. Adaptogenic herbs like ashwagandha may help normalize cortisol levels, though individual responses vary.

Advanced Topical-Dietary Synergies

Beyond the well-established pairings of vitamin C and E, emerging research reveals additional synergies between dietary intake and topical application. Understanding these interactions allows you to build a more sophisticated inside-out routine that maximizes the benefits of both approaches.

Niacinamide, the amide form of vitamin B3, illustrates this synergy powerfully. Topical niacinamide strengthens the skin barrier, reduces hyperpigmentation, and regulates oil production. Dietary niacin from meat, fish, peanuts, and whole grains supports cellular energy production throughout the body, including skin cells. The combination ensures that your skin receives B3 both from the bloodstream for internal functions and from the surface for barrier reinforcement.

Polyphenols from green tea demonstrate complementary effects when consumed and applied. Drinking green tea provides catechins that reduce systemic inflammation and protect against UV damage from within. Topical green tea extract delivers concentrated EGCG directly to skin cells, where it scavenges free radicals and inhibits collagen-degrading enzymes. Japanese populations with high green tea consumption show lower rates of photoaging, suggesting that internal and external use together provide meaningful protection.

Hyaluronic acid, a molecule that holds up to 1,000 times its weight in water, presents an interesting case. Oral hyaluronic acid supplements have shown benefits for skin hydration in clinical trials, likely because fragments are absorbed and distributed to skin tissue. Topical hyaluronic acid provides immediate surface hydration and creates a film that prevents water loss. Using both approaches addresses hydration at the dermal level through supplements and the epidermal level through skincare.

Carotenoids represent another layer of inside-out protection. Lutein and zeaxanthin accumulate in skin tissue when consumed regularly from leafy greens, corn, and eggs. These compounds filter blue light and provide antioxidant protection. Topical application of carotenoid-containing products offers additional surface defense. The combined approach addresses both the deeper skin layers where carotenoids accumulate through diet and the surface where environmental exposure occurs.

Coenzyme Q10 decreases in skin with age and UV exposure. Topical application of CoQ10 in serums and creams helps replenish local levels, supporting cellular energy production and antioxidant defense. Dietary sources include organ meats, fatty fish, and whole grains, though absorption from food is limited. The combination of modest dietary intake with concentrated topical application addresses both systemic CoQ10 status and skin-specific needs.

Personalizing Your Approach Through Observation

General recommendations provide a starting point, but your individual response to foods and skincare products depends on your genetics, microbiome, environment, and hormonal status. Developing observational skills helps you identify which interventions benefit your specific skin and which to abandon.

A food and skin journal reveals patterns that escape notice in daily life. Record what you eat, noting specific ingredients, and photograph your skin weekly under consistent lighting. After four to six weeks, review the entries for correlations. Many people discover connections they had not suspected, such as breakouts following dairy consumption or improved clarity after increasing omega-3 intake. Digital apps can help track this information efficiently.

Pay attention to timing. Some food reactions appear within hours, such as flushing after alcohol or histamine-rich foods. Others develop over days, making them harder to link to specific triggers. Acne often appears three to five days after a triggering event, so the pimple that emerges on Friday may relate to what you ate on Tuesday. Understanding these delayed responses helps you identify true triggers.

Consider working with professionals for deeper insights. Registered dietitians can analyze your intake for nutritional gaps affecting skin. Dermatologists can identify conditions that mimic dietary reactions, such as perioral dermatitis triggered by topical products rather than food. Integrative practitioners often combine both perspectives. Bring your journal to appointments to provide concrete data.

Genetic testing offers another layer of personalization. Variations in genes related to vitamin D metabolism, collagen production, inflammation, and antioxidant defense influence how your skin responds to dietary factors. While genetic testing cannot prescribe a perfect diet, it can highlight areas requiring extra attention. For example, variants in the MTHFR gene affect B vitamin metabolism and may increase the need for methylated folate, which influences cell turnover.

Remember that your skin’s needs change over time. Hormonal shifts, medications, stress levels, and aging all affect how your skin responds to diet and skincare. What worked in your twenties may not suit your thirties or forties. Periodic reassessment, ideally every few years, ensures your inside-out routine evolves with your changing physiology.

Environmental Factors That Modify Nutritional Needs

Your nutritional requirements for skin health depend heavily on your environment. Urban pollution, altitude, climate, and occupational exposures all increase demand for certain nutrients. Adjusting your intake to compensate for these factors helps maintain skin health despite challenging conditions.

Urban air pollution exposes skin to particulate matter, polycyclic aromatic hydrocarbons, and ozone, all of which generate oxidative stress. Studies show that people living in areas with high air pollution experience more hyperpigmentation, reduced hydration, and accelerated aging. Counteracting this assault requires higher antioxidant intake. Broccoli sprouts contain sulforaphane, which activates the Nrf2 pathway and boosts cellular antioxidant production. Vitamin C, vitamin E, and carotenoids become even more critical when pollution exposure is high.

Altitude increases UV radiation exposure by approximately 4 percent for every 1,000 feet of elevation. At high altitudes, your skin requires additional photoprotection from both sunscreen and diet. Increasing lycopene intake through tomatoes and watermelon provides measurable protection against UV damage. Adequate selenium supports glutathione production, your body’s master antioxidant. Vitamin C requirements also increase at altitude due to oxidative stress from both UV exposure and lower oxygen levels.

Indoor environments present their own challenges. Heating and air conditioning reduce humidity, accelerating transepidermal water loss. Office lighting and screen time expose skin to blue light, which penetrates more deeply than UV and may contribute to hyperpigmentation. Combat these effects with extra omega-3s for barrier support and lutein for blue light filtration. A humidifier in your living space helps, but dietary hydration remains essential.

Occupational exposures affect nutritional needs dramatically. Healthcare workers exposed to repeated hand washing and sanitizer use need additional barrier support through ceramides and fatty acids. Outdoor workers require higher antioxidant intake to counter UV exposure. Those working night shifts face disrupted circadian rhythms that impair skin repair, making anti-inflammatory nutrition even more important.

Hard water, which contains high mineral content, leaves deposits on skin that can cause irritation and interfere with skincare product absorption. If you live in a hard water area, chelating ingredients in skincare help, but dietary approaches also matter. Ensuring adequate zinc and vitamin A supports skin resilience against mineral-induced irritation. Some people find that filtered water for face washing improves skin comfort.

Frequently Asked Questions

How long until I see results from dietary changes to my skin?

Most people notice initial improvements in skin hydration and brightness within two to four weeks of consistent dietary changes. The epidermis completely renews itself every 28 days, so changes in cell quality become visible after one full cycle. Deeper concerns like acne scarring or loss of firmness require several months of sustained nutritional support, as collagen remodeling occurs gradually.

Can supplements replace skin-supporting foods?

Supplements can help fill specific gaps, but they cannot replicate the complex nutritional matrix of whole foods. Foods provide fiber, hundreds of phytonutrients, and synergistic compounds that enhance absorption. Consider supplements for targeted needs, such as vitamin D during winter months or omega-3s if you rarely eat fish, but prioritize food sources first.

Which foods most commonly trigger skin problems?

High-glycemic foods that spike blood sugar, including white bread, sugary snacks, and soft drinks, trigger insulin release and inflammatory pathways that can worsen acne. Dairy products show associations with acne in some studies, though individual responses vary. Processed foods high in refined oils and added sugars promote systemic inflammation that affects skin health. Identifying your personal triggers through an elimination approach proves most effective.

Do expensive skincare products work better than affordable options?

Price does not reliably predict effectiveness. What matters most is the concentration and formulation of active ingredients. Many affordable brands offer well-formulated products with evidence-backed ingredients like niacinamide, vitamin C, and ceramides. Consistent use of appropriate products for your skin type matters far more than brand prestige or price point.

Is it possible to eat well and still have skin issues?

Absolutely. Skin health involves genetics, hormones, environmental exposures, stress levels, and skincare habits alongside diet. Excellent nutrition supports your skin but cannot override all other factors. Persistent concerns warrant consultation with a dermatologist, who can identify underlying causes and appropriate treatments. Diet serves as one important component of comprehensive skin care.

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