The global supplement industry, projected to reach £350 billion by 2032, sees significant expansion in the beauty pill market, with products claiming to enhance skin's appearance. However, dermatologists urge consumers to scrutinize these claims, noting that for many, diet and lifestyle factors are more impactful.
Collagen supplements, a prevalent product marketed for anti-aging, are a frequent subject of inquiry. While some studies suggest hydrolysed collagen peptides can improve skin hydration and elasticity, experts point out that many of these trials are funded by supplement manufacturers. A 2025 review indicated that when studies without industry funding were analyzed, the apparent benefits diminished. Dermatologists emphasize that eating sufficient protein, avoiding smoking, and using SPF are more reliable methods for maintaining skin quality.
Ceramides, lipids naturally present in the skin barrier, are available as oral supplements. While trials indicate they can help prevent water loss from the skin, experts suggest their efficacy is better established in topical treatments like moisturizers. There is limited evidence supporting their use for reducing wrinkles or signs of aging.
Vitamin E, an antioxidant, is found in various foods and helps protect skin cells from sun damage. However, dermatologists advise that vitamin E supplements are generally only beneficial for individuals with a diagnosed deficiency. For those with an adequate diet, there is insufficient evidence that oral vitamin E leads to visibly younger or healthier skin. Furthermore, excessive intake of vitamin E, with some products containing around 270mg per capsule, can pose risks. European safety guidelines recommend a daily intake of no more than 300mg due to potential interference with blood clotting, a concern particularly for individuals on anticoagulant medications.
Zinc, an essential mineral found in foods like oysters and red meat, plays a role in collagen production and wound healing. There is some evidence suggesting high doses of zinc may help with acne, though side effects like diarrhea and nausea can occur. Dermatologists describe the evidence for general use as inconsistent, but note its importance for those with a deficiency. However, long-term high-dose zinc supplementation can interfere with copper absorption, potentially leading to anemia and other health issues. Recommended daily intake, including dietary sources, should not exceed 40mg.
Selenium, another essential micronutrient involved in immune function and protecting cells from damage, is sometimes marketed for skin benefits. However, experts caution that the body requires only small amounts, and excessive intake can lead to adverse effects like skin rashes and hair loss. The NHS advises a maximum daily intake of 350 micrograms, and many supplements contain between 200 and 300 micrograms per capsule.
Biotin (Vitamin B7) is commonly found in hair, skin, and nail supplements. Experts advise caution, especially with high doses, as deficiency is rare and evidence for its benefit in non-deficient individuals is limited. High doses can also interfere with important laboratory blood tests.
The consensus among dermatologists is that unless a specific nutrient deficiency is identified, skin supplements are likely an unnecessary expense. The prevailing advice is to prioritize a balanced diet, as