Biotin Complex

Biotin has an excellent safety profile even at very high doses. The European Food Safety Authority has established no tolerable upper intake level for biotin — meaning there is no identified safe upper limit because toxicity has not been demonstrated even at high supplementation levels.

This matters because visible results from biotin supplementation are dose-dependent. A 2015 study in the Journal of Clinical and Aesthetic Dermatology found that women with self-perceived thinning hair who supplemented with high-dose biotin showed significant improvement in hair growth and hair shedding after 90 days. Lower-dose biotin supplements — the vast majority on the market — do not reliably produce the same outcomes.

10,000µg is what the research uses. That is why we use it. Not because it sounds impressive on a label — because it is the dose that produces the results people are taking biotin for.

Biotin alone addresses the B7 component of hair and nail health. But hair loss and brittle nails are rarely caused by a single nutrient deficiency. Selenium and Zinc work synergistically with biotin — and both are frequently deficient in UK adults.

We chose Zinc Citrate Chelate specifically. Zinc is available in several forms — oxide, sulphate, gluconate, citrate chelate. Research consistently shows chelated mineral forms have higher bioavailability and gentler digestive effects than oxide or sulphate forms. Zinc oxide — the most common form in cheaper supplements — has significantly lower absorption. Zinc Citrate Chelate costs more to produce. It absorbs better. We chose it.

Selenium at 200µg — 364% NRV — at this level acts as a meaningful antioxidant. Oxidative stress is a significant driver of premature hair loss and accelerated skin ageing. Selenium as an antioxidant directly addresses this. At 55µg (100% NRV), the antioxidant effect is marginal. At 200µg, it is clinically meaningful.

Hair growth cycles take time. The anagen (growth) phase of a hair follicle lasts 2–7 years — but the visible improvement from nutritional supplementation becomes measurable over 3–6 months of consistent daily use. This is why most biotin supplements sold in one-month supplies produce disappointing results — not because biotin does not work, but because people stop before the growth cycle has had time to respond.

At 120 tablets per bottle, our Biotin Complex provides four months of daily supplementation at a single dose — £24.99 for four months works out at approximately 21p per day.

One tablet daily with food. That is the entire protocol.