Biotin has an established, EU-authorised role in normal hair and skin maintenance, though supplementation mainly helps where a genuine deficiency exists — true biotin deficiency is uncommon in people eating a varied diet. For the full picture, including an important blood test interference warning, see our complete guide to Biotin. Below you’ll find our picks, chosen for appropriate dosing and quality certification.
Beauty & Skin Support
Beauty & Skin Support
Beauty & Skin Support
Choosing a Biotin Supplement
Commonly available doses range from 2,500-10,000mcg daily, well above the general dietary reference intake, since higher doses are what most hair and nail research has used. One safety point worth knowing before you buy: high-dose biotin can interfere with certain thyroid and cardiac blood test results, causing falsely abnormal readings — if you take a biotin supplement regularly and are having blood tests done, mention this to your GP or the lab beforehand. Our full guide covers realistic expectations for hair and nail results, and more detail on this interaction.