Type "biotin" into TikTok and you will see 30-day transformation videos. Ask a trichologist and you will get a very different answer. Here is the honest timeline — grounded in how hair actually grows, not in content-creator maths.

First, what biotin actually does

Biotin (vitamin B7) contributes to the maintenance of normal hair and normal skin — that is the officially authorised wording in the UK, and it is a fair summary: biotin supports the normal processes your body already runs. It is not a magic growth serum.

The timeline problem nobody mentions

Hair grows roughly 1–1.25cm per month, and each strand spends years in its growth phase. Any nutrient you start taking today can only influence hair that is being built from now on — the length you already have is done and dusted.

Realistic expectations:

• Weeks 1–4: nothing visible. This is normal. Nails, which grow faster, are often where people notice changes first.
• Months 2–3: new growth at the root has had time to appear; nails have nearly fully renewed.
• Months 3–6: enough new hair length exists to judge fairly.

Anyone promising visible hair results in a fortnight is selling you a story.

Why biotin alone is not the full picture

Hair and nails draw on a team of nutrients, which is why decent beauty formulas are combinations, not solo acts:

• Zinc — contributes to the maintenance of normal hair, skin and nails.
• Selenium — contributes to the maintenance of normal hair and nails.
• Vitamin C — contributes to normal collagen formation for the normal function of skin.

Our Hair, Skin & Nails Gummies combine 8 beauty nutrients — including biotin, zinc and selenium — in a strawberry-flavoured, zero sugar, vegan gummy.

How to actually get results

• Take them daily for at least 3 months before judging. Set a subscription so you never run out mid-experiment — Subscribe & Save takes 20% off while you are at it.
• Photograph your starting point. Memory is a terrible judge of gradual change.
• Be kind to the hair you have — heat, tight styles and bleach undo good work faster than any gummy can do it.

FAQ

Can I speed things up by taking more?

No — stick to the label. Extra biotin does not build hair faster; consistency over months is the mechanism.

Will biotin help if my hair loss has a medical cause?

Supplements are not treatments. If you are experiencing significant hair loss, see your GP — it is worth ruling out underlying causes first.

Nails first, hair later — is that normal?

Completely. Nails renew in roughly 4–6 months and show change sooner; hair simply takes longer to display new work.

Building a glow routine? Read the clean girl glow routine, explained — or start with Onvit Hair, Skin & Nails Gummies: 8 nutrients, zero sugar, vegan.

Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. This article is general information, not medical advice.