An Important Correction on Absorption, Plus a Dosage Safety Note
This Biotin Liquid Spray delivers 12,000mcg of biotin per serving, notably higher than the 2,500-10,000mcg range most hair and nail research is actually based on, as covered in our complete biotin guide. It’s worth correcting the product’s own absorption claim: research on oral biotin bioavailability has found it’s already very efficiently absorbed — close to 100% — even at high doses, which means the premise that liquid or sublingual delivery is needed to “bypass” a digestive absorption problem doesn’t reflect what the research actually shows for biotin specifically. There isn’t strong evidence that sublingual biotin offers a meaningful absorption advantage over standard oral biotin.
It’s also worth noting the product describes two different application methods — under the tongue and directly on the scalp — which work through entirely different mechanisms; topical scalp application doesn’t achieve the same systemic absorption route as sublingual use, and there isn’t established research supporting biotin absorption through the scalp specifically for hair growth.
Given this dose specifically, one safety point matters more than usual: high-dose biotin can interfere with certain thyroid and cardiac blood test results, causing falsely abnormal readings. If you take this product regularly and have blood tests coming up, tell your GP or the laboratory beforehand — this is a genuine, documented interaction that becomes more relevant the higher the dose, and isn’t mentioned in this product’s own marketing material.
Biotin has an established, EU-authorised role in the maintenance of normal hair and skin — supplementation helps most reliably where a genuine deficiency exists, and true biotin deficiency is uncommon in people eating a varied diet. Individual results and timelines vary considerably, and specific week-by-week improvement claims are best read as general possibility rather than an expected outcome for everyone.
This vegan formula is free from artificial colours or flavours, and free from gluten, wheat, and nuts. Manufactured in the UK to GMP standards with batch testing. Each 60ml bottle provides 120 servings (around 4 months at the standard dose). Speak to your GP before starting if you take regular medication, have an existing health condition, or have thyroid-related blood tests scheduled.
The Research Behind This Product
Skin, Hair & Nail Health
Biotin Supplements: What the Evidence Actually Shows for Hair & Nails
What biotin genuinely does for hair, skin and nails — the real EU-authorised claim behind it, and the one important blood-test interaction worth knowing.
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