If you’ve ever searched for ways to boost your hair, lash or brow growth, chances are you’ve stumbled across Biotin. But what exactly is this beauty buzzword, and why is everyone so obsessed with it? In this Biotin Ingredient Guide, we’re taking a deep dive into Biotin for the hair, lashes and brows; what it is, how it works, where to find it, and what to do if you’re not getting enough.

What Is Biotin?

Biotin (also known as Vitamin B7 or Vitamin H) is a water-soluble B-vitamin that plays a crucial role in helping your body convert food into energy. But more importantly for us beauty obsessives, it supports the health of your hair, skin, and nails.
Basically, think of Biotin as the backstage crew making sure everything runs smoothly; it helps build Keratin, a crucial protein that forms the structure of your hair strands, lashes, brows and nails.
Your body doesn’t store Biotin for long (since it’s water-soluble, any excess gets flushed out), so it’s something you need to top-up daily, either through your diet or via a Biotin supplement.
Some people even opt for Biotin injections (usually under clinical supervision), but for most of us, a high-quality daily supplement, such as the UKLASH Hair Vitamins or biotin-rich foods are more than enough

Biotin For Hair Growth

If you’re Googling “how much biotin for hair growth” or “best biotin tablets for hair growth”, you’re not alone.

Biotin has gained cult status for its role in hair growth and strength. So how does it work?

Your hair grows in in a cycle that includes three stages; Anagen (Growth Phase), Catagen (Transitional Phase), and Telogen (Resting Phase). Biotin supports the Anagen phase, promoting stronger strands and a healthier scalp environment. It’s not a magic wand, but it supports the natural rhythm of your hair growth cycle by improving the keratin infrastructure. If you'd like to learn more about the hair growth cycle and how to make your hair grow, head to our article here.

Clinical data is still catching up with the hype, but real customer stories suggest that Biotin Vitamins for hair growth, especially when combined with other hair-loving nutrients like Zinc and Folic Acid, can help reduce breakage, increase thickness, and support fuller hair.

Wondering how much Biotin to take daily for hair growth? While there’s no official recommended Biotin daily intake in the UK, experts suggest that your daily adequate intake should be around 30 micrograms mcg - 100 micrograms mcg per day is typically sufficient. UKLASH Hair Vitamins are carefully formulated to give you just the right daily dose.

What Foods Contain Biotin?

Biotin naturally occurs in a variety of foods. Here are some top Biotin foods for hair support:

• Eggs (especially the yolk)
• Nuts and seeds (almonds, walnuts, sunflower seeds)
• Sweet potatoes
• Spinach
• Salmon
• Avocados
• Bananas
• Broccoli

Eating a varied, balanced diet is the best way to keep your levels of Biotin topped up naturally. But let’s be real, not everyone loves eggs and spinach, and if you’re a fussy eater, it can be hard to get enough Biotin through food alone.

That’s where a Biotin vitamin supplement comes in handy. If you find it difficult to meet your Biotin needs from diet alone, the UKLASH Hair Vitamins are a fuss-free, effective way to support your beauty goals from the inside out. Just two a day will help to deliver the perfect amount of Biotin to support a healthy lash, brow and hair cycle.

Does Biotin Help Lashes & Brows Grow?

Yes! In a very similar way to the hair on your head, Biotin can help support longer, stronger and healthier-looking lashes and brows.

Just like your scalp hair, your lashes and brows follow a growth cycle. Biotin contributes to healthy follicle function, and by supporting Keratin production and cellular growth, it can help you retain lash and brow hairs for longer before they shed naturally.

So if you’re finding your brows look sparse, or your lashes snap off before they reach their full fluttery potential, boosting your Biotin intake could help enhance your results, especially when combined with targeted topical treatments like UKLASH Lash Serum or Brow Serum.

Biotin Deficiency and Hair Loss

Although Biotin deficiency is relatively rare, it can and does happen. And when it does, your hair and skin are often the first to suffer.

Signs of Biotin Deficiency Include:

• Hair thinning or excessive shedding
• Brittle nails
• Dry, flaky skin
• Fatigue or low mood
• Red rashes (especially around the eyes or mouth)

If you’re noticing signs of hair loss or sluggish growth, and you suspect it might be related to low Biotin levels, don’t panic. Start by evaluating your diet.

Are you skipping meals? Following a restricted eating plan? Or perhaps dealing with gut health issues that could affect absorption?

In terms of the best dose of Biotin, most Biotin supplements for hair, skin and nails range between 30–5000 mcg. UKLASH Hair Vitamins are formulated to be safe and effective, sitting in the sweet spot where results meet safety.

When To See a GP or Trichologist

If you’ve been taking Biotin consistently for 12 weeks and haven’t noticed improvement, or if your hair loss is sudden, patchy or severe, it’s worth consulting a professional.
In the UK, you can go to your GP for basic blood tests and referrals, but if you want a more focused approach, you might want to book with a Trichologist.

What’s a Trichologist?

A Trichologist is someone who’s trained to diagnose and treat hair and scalp disorders. They can assess your follicles, lifestyle, and nutrient profile to uncover underlying causes.
How much does it cost?
Expect to pay around £100–£150 for a first consultation in the UK. You can find a qualified Trichologist via the Institute of Trichologists or similar directories.

What Is The Best Time To Take Biotin?

While Biotin can technically be taken at any time of day, for best absorption, take your biotin supplement in the morning with food.

Because it’s a water-soluble vitamin, your body absorbs it more effectively alongside other nutrients, and taking it with breakfast helps you build it into your routine. Bonus: Some people report a subtle energy boost, which is perfect for mornings.

Avoid taking Biotin right before bed if you’re sensitive to B-vitamins, as they can sometimes make you feel more alert.

>>> Expert Tip: Consistency is key. Biotin won’t work overnight, so make it a part of your daily routine and stick with it for at least 8–12 weeks before judging the results.

So, is Biotin for the hair really worth the hype? In short, yes. While it’s not a miracle cure, Biotin is an essential vitamin and plays a powerful supporting role in your body’s natural ability to grow healthy skin, hair and nails.

Whether you’re boosting your intake through Biotin-rich foods or topping up with a Biotin supplement like the UKLASH Hair Vitamins, this mighty little B-vitamin deserves a spot in your beauty toolkit.

If you’re struggling with hair thinning, lash fallout or sparse brows, don’t underestimate the power of addressing your health from the inside out. Biotin could be the missing piece in your hair puzzle.

Ready to see what biotin can do for you? Try our UKLASH Hair Vitamins, designed to work in synergy with your body and your goals—for stronger, longer, glossier hair, lashes and brows that turn heads.