Biotin – also called vitamin B7 – is a supplement which can help you to maintain healthy hair, skin and nails. It's an essential nutrient and works by aiding keratin production.

You can get biotin in your diet by eating eggs, nuts and seeds but if you have especially weak nails, thinning hair or dry skin you might find it useful to add in a supplement.

Biotin supplements are available as capsules, tablets and gummies. They often vary in dosage and may include added nutrients like zinc or selenium to enhance their benefits. Identifying your specific needs and preferences can help you select the most suitable option for your lifestyle.

We put biotin supplements to the test so you can make the right choice when choosing one. Read on to find out more.

Next, check out our reviews of the best collagen supplements, best supplement for sleep, best vegan protein powder, best magnesium supplements and best vitamin D supplement UK.

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Best biotin supplements at a glance

Best Biotin supplements:

  • Solgar Biotin 5000mcg, £22.50
  • New Leaf Biotin, Zinc & Selenium, £6.94
  • Cytoplan Hair, Skin & Nails, £22.50
  • Biocare Hair, Skin & Nail Complex, £28.45
  • Nutrition Geeks Biotin Growth+, £9.99
  • Perfectil SKIN, £18.95

Best Biotin supplements to buy 2025

Solgar Biotin 5000mcg

Solgar biotin

Price per day: 45p

Star rating: 5/5

With 5000mcg per capsule this biotin supplement provides more than your recommended intake but at a fairly decent price. There's no noticeable taste or smell and they're easy to take.

Available from:
Amazon (£13.99)
Solgar (£22.50)

New Leaf Biotin, Zinc & Selenium

New Leaf biotin

Price per day 12p

Star rating: 4/5

These small easy-to-swallow, tasteless tablets delivers a high dose of biotin in two tablets a day. They provide all your daily selenium requirements, plus 50% of your zinc reference intake. You can buy on subscription and receive a discount, making it good value too.

Available from:
Amazon (£6.94)
New Leaf (£10.95)
Superdrug (£10.95)

Cytoplan CytoProtect Hair, Skin & Nails

Cytoplan biotin

Price per day 38p

Star rating: 4/5

This is a blend of biotin, zinc and selenium as well as important antioxidants specifically formulated to support healthy hair, skin and nails. They are easy-to-swallow capsules but some testers found that they do have quite a strong smell which may be off-putting for some.

Available from:
Cytoplan (£22.50)

Biocare Hair, Skin & Nail Complex

Biocare biotin

Price per day £1.25

Star rating: 4.5/5

A good all-rounder, this product contains biotin and zinc, as well as vitamins, minerals and antioxidants. The capsules are easy to swallow and tasteless but testers noted a grassy smell. There are no additional fillers or additives.

Available from:
Revital (£28.45)
BioCare (£37.60)
Victoria Health (£37.59)

Nutrition Geeks Biotin Growth +

Nutrition geeks biotin

Price per day 11p

Star rating: 4.5/5

For a general biotin supplement with some zinc, which also helps maintain healthy skin, hair and nails, and selenium, this supplement is good value for money. There are bigger discounts available if you buy on subscription and the product has small, easy-to-swallow tablets with no taste or smell.

Available from:
Nutrition Geeks (£9.99)
Amazon (£9.99)

Perfectil SKIN

Perfectil biotin

Price per day 68p

Star rating: 3.5/5

This blend of nutrients includes omega-3 and antioxidants. The pack comes with a tablet and capsule – you take one of each a day. The tablet is quite large and the capsule has a distinct smell, which may be problematic for some. It's easy to incorporate into your routine as the pack comes with days of the week written on. Bulking agents, talc and colours have been added.

Available from:
Vitabiotics (£18.95)
Amazon (£18.95)
Boots (£20)

Does biotin help hair growth?

Yes, there is some evidence which suggests that biotin can help to make hair healthier.

Is biotin good for skin?

A few small studies demonstrate that when people with thin and brittle nails took high doses of biotin it did have a positive effect.

How long does biotin take to work?

It is likely to take anywhere from 30 days to several months for you to notice healthier skin and hair. This will vary from person to person.

How much biotin should I take per day?

There is no recommended daily allowance for biotin in the UK. However, the NHS suggests that we should be able to get enough from our diet. Its recommendation is to take 0.9mcg or less, although some evidence supports 30mcg a day for adults.

How should I take a biotin supplement?

No single nutrient works on its own so if you are going to take a biotin supplement look for one that has other vitamins and minerals as well. It's recommended to take biotin supplements with food and plenty of fluid.

What type of biotin is best?

There is some evidence that liposomal supplements may provide better nutrient uptake but as tablets and capsules tend to contain more nutrients it might be wise to look for one of these.

Can you take biotin and collagen together?

Both biotin and collagen are used to improve hair, skin and nail health. It is generally considered safe to take the two together and you may even find some supplements which include both.

What we looked for in biotin supplements

All supplements were tested within the same time period, with observations recorded based on the testing criteria. We included samples from various manufacturers, offering diverse formats such as capsules, tablets, gummies and soluble offerings, with a range of price points to suit different budgets. The key areas we assessed were as follows:

Taste and flavour: is the consuming experience pleasant?

Nutrient profile: how much biotin per daily dose? How does this compare to the NRV?

Additives: does the product contain additives, for example: preservatives, artificial sweeteners or colourings?

Dietary requirements: does the product meet any specific dietary needs – is it vegetarian or vegan?

Value for money: how does it compare to other products on a cost-per-day basis?

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Authors

Isabella Keeling - Deputy health editorDeputy health editor

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