Healthy skin isn't just about what you put on your face. Nutrition experts say what you eat matters just as much-sometimes more-when it comes to keeping your skin hydrated, resilient, and looking its best.
Vitamin D is one of the few nutrients with a clearly defined daily requirement: 600 IU for adults under 70, 800 IU for those over 70, and a safe upper limit of 4,000 IU per day, according to NIH dietary guidelines.
Curcumin and vitamin D: more than buzzwords
Curcumin, the main compound in turmeric, is drawing attention for its antioxidant and anti-inflammatory effects. Some studies suggest it may help with skin issues like acne, psoriasis, and atopic dermatitis, though the research is still early and not part of standard treatment. To get more curcumin, try adding turmeric to rice or smoothies, and pair it with black pepper to help your body absorb it.
Vitamin D also plays a direct role in skin health. Costello notes that vitamin D helps the skin stay balanced and may reduce inflammation from aging or environmental stress. Holden adds that active forms of vitamin D3 can help protect against UV rays, pollution, and microbes. But vitamin D is naturally found in only a few foods-fatty fish, eggs, and mushrooms exposed to UV light. Some dairy and plant-based milks are fortified, but most people don't get enough vitamin D from food alone. The NIH Office of Dietary Supplements says deficiency is common in the U.S., so supplements are sometimes needed, but this is best discussed with a doctor.
Gut health and healthy fats: probiotics and omega-3s
Probiotics, found in foods like yogurt, kimchi, kefir, and sauerkraut, do more than support digestion. Reviews show that probiotics can help skin stay hydrated, reduce water loss, and boost ceramide levels in skin cells. Some clinical trials have found that people with psoriasis who take probiotics see improvements in both symptoms and quality of life. The gut-skin connection is a growing area of research, and while not every link is proven, a healthy gut may benefit your skin.
Claims Check: While many nutrition shake brands market their products for 'gut health' or 'skin support,' regulatory authorities require that such claims be substantiated by clinical evidence and not imply disease treatment. For example, the FDA prohibits supplement labels from stating that a product can cure or treat skin conditions unless supported by robust human trials.
Fiber: the overlooked skin supporter
Fiber doesn't usually come up in conversations about skin, but its role is getting more attention. Nicolle Cucco, M.S., RD, CDN, points to the gut-skin axis: a healthy gut microbiome, supported by enough fiber, can influence skin health. Fiber feeds good gut bacteria, which produce short-chain fatty acids like butyrate. These help keep the skin barrier strong by supporting skin cell metabolism. Diets high in fiber-think whole grains, fruits, vegetables, nuts, seeds, and legumes-may even help with skin allergies by strengthening this barrier. Most people don't get the recommended 28 grams per day, but adding soups, salads, stir-fries, or baked oats can help close the gap.
If you're interested in how seasonal produce can also support skin and reduce inflammation, see our earlier article on four in-season foods with extra benefits.
How to make these nutrients part of your routine
Costello and Holden both recommend focusing on nutrient-rich foods instead of expensive supplements or topical products. Small, steady changes work best: try to include at least one of these five nutrients in your meals each day. That could mean adding turmeric to a smoothie, choosing yogurt with live cultures, or swapping in fatty fish for dinner. Over time, these habits can add up to real improvements in skin health.
Nutrition isn't a quick fix, but the evidence shows that what you eat can shape how your skin looks and feels. Prioritizing curcumin, vitamin D, probiotics, omega-3s, and fiber is a practical, research-backed way to support your skin from the inside. In a world full of overhyped beauty products, some of the most effective solutions may still be found in your kitchen.
