Skin health depends on plenty of factors — genetics, skincare routine, sleep, stress — but diet is far from a minor player among them. Skin is the body’s largest organ, and like any other organ, it draws nutrients from the bloodstream, which means it’s directly shaped by what regularly ends up on the plate.

Hydration comes first

Dehydrated skin loses elasticity faster and tends to look duller, so getting enough fluid is one of the simplest and most effective habits. This isn’t limited to plain water — soups, water-rich fruits like watermelon and cucumber, and herbal teas all contribute to overall hydration. Coffee and alcohol, on the other hand, have a mild diuretic effect and can add to dehydration when consumed in excess.

Omega-3 fatty acids

Fatty fish — salmon, mackerel, sardines — are a solid source of omega-3 fatty acids, which support the skin’s barrier function and help it retain moisture from within. These same fats also play a role in regulating inflammation in the body, and chronic inflammation is often linked to premature skin aging. For those who don’t eat fish, flaxseed, chia, and walnuts serve as alternatives, though plant-based omega-3s are processed by the body somewhat differently.

Antioxidants from fruits and vegetables

Berries, citrus fruits, spinach, and other leafy greens are rich in vitamins C and E as well as carotenoids — compounds that neutralize free radicals which damage skin cells under UV exposure and air pollution. Vitamin C also plays a role in collagen synthesis, the protein responsible for skin’s firmness and elasticity, so a diet consistently low in it can show up in skin appearance over time.

Foods worth limiting

Excess sugar and heavily processed carbohydrates can speed up glycation, a process in which sugar molecules bind to collagen and make it stiffer and less elastic. That doesn’t mean sweets need to disappear entirely, but frequent sugary drinks, pastries, and fast food are worth balancing out with a more varied diet overall. In some people, dairy and high-glycemic foods are also linked to breakouts, though this reaction is fairly individual.

Zinc and skin health

Zinc plays a role in tissue repair and regulating the oil glands in skin, so a shortfall is sometimes associated with a higher tendency toward inflammation and breakouts. Pumpkin seeds, chickpeas, beef, and whole grains are accessible sources of this mineral that fit easily into a normal diet without needing supplements.

Gut health and skin

The connection between gut microbiota and skin condition is an active area of research, and while the conclusions are less settled than one might hope, there’s evidence that fermented foods — yogurt, kefir, sauerkraut — can support a healthier inflammatory response in the body overall. A varied diet with enough fiber helps maintain a balanced gut microbiome, which may indirectly show up in skin condition as well.

Diet isn’t the whole picture

Nutrition is an important piece of the puzzle, but not the only one. Adequate sleep, sun protection, and managing stress work alongside diet rather than replacing it. Dietary changes also don’t show up on skin immediately — skin cells take several weeks to turn over, so it’s worth giving any change in eating habits at least a month or so before judging the results.