A balanced diet rich in plant-based foods, healthy fats and fermented products may help reduce wrinkles, stimulate collagen production and improve skin texture, according to dermatologists and nutrition scientists.
As the body’s largest organ, the skin serves as an essential protective barrier throughout life. Proper nourishment is important not only for maintaining a youthful appearance but also for supporting overall health. However, constant exposure to environmental stressors can cause significant skin damage over time.
Air pollution, atmospheric ozone and changing climatic conditions are major drivers of skin ageing, according to Jean Krutmann, professor of dermatology at the Leibniz Research Institute for Environmental Medicine, reports BBC.
“For decades we thought ultraviolet radiation was the major driver of environmental-induced skin ageing. We know this is not correct,” Krutmann explained, noting that visible light, infrared radiation and high ambient temperatures also accelerate cellular ageing.
Meanwhile, natural ageing gradually reduces the skin’s structural collagen, eventually leading to fine lines and wrinkles. Although topical skincare products are widely used, dietary choices remain a powerful yet frequently overlooked way to protect skin health.
Antioxidants, carotenoids and baseline UV protection
Research indicates that plant-rich diets are essential for skin health, as colourful fruits and vegetables provide antioxidants that help counter damage caused by sunlight and pollution.
Carrots, bell peppers and tomatoes contain high levels of carotenoids, including lutein, lycopene and beta-carotene. Volker Böhm, professor of food chemistry at Friedrich Schiller University Jena, noted that these compounds accumulate in fatty tissue and help protect against ultraviolet rays.
Although daily sunscreen application remains essential, Böhm explained that people often use sunscreen only when spending extended periods outdoors. Regularly consuming carotenoid-rich foods provides a baseline level of UV protection throughout the year, equivalent to a sun protection factor of approximately two to three.
Pairing tomatoes or carrots with a small amount of healthy fat, such as olive oil, can improve antioxidant absorption. Beta-carotene is converted into vitamin A in the body, supporting skin-cell growth and helping protect against infections.
Carotenoids also encourage skin cells to produce hyaluronic acid, a moisture-binding molecule responsible for skin firmness and elasticity and commonly found in moisturisers and anti-ageing treatments.
These plant pigments may also promote collagen synthesis. In a small trial, women who took a daily carotenoid supplement for 10 months showed increased collagen and elastin levels, suggesting protection against the breakdown of skin structure. Eating a variety of colourful fruits and vegetables can also give the skin a healthy glow.
However, Krutmann cautioned that consistency is essential. Achieving measurable protection against environmental damage generally requires eight to 10 weeks of sustained dietary antioxidant intake.
Mangoes and the benefits of vitamin C
Certain fruits may offer specific anti-ageing benefits when consumed in appropriate quantities.
A study of post-menopausal women led by Vivien Fam at the University of California, Davis, found that consuming 85 grams (2.9 ounces) of mango four times a week for 16 weeks reduced the size of existing wrinkles and the development of new ones. Researchers attributed these improvements to carotenoids, flavonoids and mangiferin.
However, the study found that consuming larger daily portions of approximately 250 grams (8.8 ounces) of mango increased wrinkling.
Robert Hackman, professor of nutrition at the University of California, Davis, and a co-author of the study, suggested that excessive natural sugar consumption may cause molecular damage to skin structures. He also noted that an unpublished follow-up study successfully replicated the findings.
Mangoes and citrus fruits are also rich in vitamin C, an antioxidant essential for collagen synthesis. Vitamin C helps protect against sun damage, improves skin hydration and reduces hyperpigmentation, making it a key ingredient in clinical skincare products and supplements.
Healthy fats, omega fatty acids and the skin barrier
Dietary fats from nuts, seeds and marine sources also play an important role in maintaining skin health.
A randomised controlled study found that participants who ate almonds as a snack for 16 weeks developed noticeably fewer wrinkles than those who consumed alternative snacks.
Nuts and seeds are rich in vitamin E, which protects cells against oxidative stress and premature ageing. Vitamin E deficiency can impair skin health and delay wound healing. Good sources include almonds, hazelnuts, pine nuts and various seed oils.
These foods also provide omega-6 fatty acids, which strengthen the skin’s outer barrier and help prevent moisture loss.
Omega-3 fatty acids, found in oily fish such as salmon, sardines and mackerel, as well as algae, may help reduce sensitivity to sunlight, ease inflammation and preserve existing collagen reserves.
The gut-skin connection and fermented foods
Emerging research highlights the close relationship between digestive health and skin condition, commonly known as the “gut-skin axis”.
A varied diet containing fruits, vegetables, pulses, legumes, whole grains, herbs and spices supports a healthy gut microbiome.
According to Hackman, gut microbes produce anti-inflammatory and antioxidant compounds when nourished with a variety of plant fibres. These compounds circulate throughout the body and benefit the skin.
A balanced gut microbiome also helps regulate immune responses, potentially protecting against inflammatory skin conditions such as psoriasis. It may also contribute to reduced stress and improved sleep quality.
Fermented foods, including sauerkraut, kimchi, kombucha and yoghurt, can help promote beneficial gut flora.
Although dietary changes cannot reverse decades of ageing overnight, experts agree that combining a nutrient-rich diet with consistent daily sunscreen use offers strong long-term protection for skin health and vitality.
