Six science-supported supplements linked to healthier, more hydrated skin

New research suggests that certain dietary supplements may play a measurable role in improving skin hydration, texture, and elasticity, offering potential support for people looking to enhance skin health from within.

While not a replacement for skincare or a balanced diet, studies indicate that specific nutrients may influence key biological processes linked to aging, inflammation, and skin repair.

Below are six supplements most frequently supported by clinical and nutritional research for skin health benefits.

Vitamin C

Vitamin C (ascorbic acid) is a powerful antioxidant that helps protect skin cells from damage caused by UV exposure and oxidative stress. It also plays a key role in collagen synthesis, which supports skin firmness and elasticity.

Research suggests vitamin C may help reduce visible signs of aging by improving collagen production, supporting skin renewal, and minimizing the appearance of dark spots by influencing melanin production.

Experts note that while there is no strict daily skin-specific dosage, intake should generally not exceed the upper limit of 2,000 mg per day. Natural sources include citrus fruits, tomatoes, peppers, and potatoes.

Vitamin A

Vitamin A, including its active form retinol, is essential for skin cell growth and repair. It is widely used in dermatology for its role in promoting skin turnover and improving texture.

Studies suggest vitamin A may support collagen production, improve elasticity, and reduce fine lines. It is also commonly used in acne management due to its effects on skin cell regulation.

However, high doses can be toxic and may cause serious side effects, including liver damage and birth defects. The recommended daily intake is about 700 mcg RAE for women and 900 mcg RAE for men, with strict medical supervision required for higher therapeutic doses.

Collagen

Collagen makes up a significant portion of the skin’s structure, but natural production declines with age, contributing to wrinkles and loss of firmness.

Hydrolyzed collagen supplements have been linked in research to improved skin hydration, reduced moisture loss, increased elasticity, and fewer visible wrinkles.

A 2025 review found consistent improvements in skin quality among individuals using collagen supplements, though results may depend on product quality and duration of use.

Omega-3 Fatty Acids

Omega-3 fatty acids are known for their anti-inflammatory properties and may benefit several skin conditions, including acne, eczema, and psoriasis.

Studies suggest omega-3s can help reduce redness, dryness, and irritation while also supporting the skin barrier and potentially reducing UV-related damage.

Typical study doses range around 2,000 mg daily, often sourced from fatty fish like salmon, sardines, and mackerel, as well as plant-based sources such as flaxseeds and walnuts.

Biotin (Vitamin B7)

Biotin plays a role in maintaining healthy skin, hair, and nails, though evidence for supplementation benefits in people without deficiency is limited.

It may help improve skin texture in individuals with low biotin levels and reduce dryness or irritation in certain cases, particularly those using topical retinoids.

While generally safe, biotin can interfere with laboratory test results, potentially leading to inaccurate medical readings.

Probiotics

Probiotics support gut and skin microbiome balance, which is increasingly linked to inflammation and acne severity.

Research indicates certain strains, such as Lactobacillus and Bifidobacterium species, may help reduce inflammation, improve hydration, and strengthen the skin barrier.

Studies also suggest probiotics may contribute to fewer breakouts and improved overall skin resilience.