Biotin for hair loss: does it really work?
You see it everywhere: biotin in hair growth supplements, biotin in shampoos, biotin in gummies. The message is always the same: more biotin, more hair. But is that actually true?
We'll be honest about it. Only what the research shows and what that means for you.
What exactly is biotin?
Biotin is a water-soluble B vitamin, also known as vitamin B7 or B8. Your body uses it for various processes: fat metabolism, energy production, and the creation of keratin. And keratin is precisely the protein structure that your hair, skin, and nails largely consist of.
That sounds logical: hair consists of keratin, biotin helps with keratin production, so more biotin = more hair. This reasoning is understandable but skips a step.
Why everyone thinks biotin works
The popularity of biotin for hair didn't come out of nowhere. There are patients where a biotin deficiency clearly caused hair loss and where supplementation reversed it. These are real cases, also described in medical literature.
The problem is that these cases were generalized. The supplement industry seized upon the conclusion and turned it into a universal truth: biotin = good for hair. The fact that this only applies if you have a deficiency disappeared somewhere in the fine print.
What does the research really say?
In 2024, a randomized clinical trial, the highest standard of evidence we know, specifically looked at biotin in men with hair loss. The conclusion was clear: biotin by itself had no positive effect on hair growth rate.
An earlier systematic review in the Journal of Clinical and Aesthetic Dermatology confirmed this picture. Of the studies analyzed by the researchers, none found a significant benefit of biotin supplementation in people without a demonstrable deficiency. The researchers put it this way: there is a large gap between how people perceive biotin and what the research actually shows.
Biotin is not harmful. But it's also not a miracle cure.
The reason biotin rarely helps men
Male pattern hair loss, the most common form, is caused by DHT. This is a hormone that slowly shrinks hair follicles until they stop producing hair. This process is called androgenetic alopecia and is largely hereditary.
Biotin does nothing to DHT. It does not affect the sensitivity of hair follicles to DHT, does not inhibit the enzyme that converts testosterone to DHT, and does not slow down the shrinking of hair follicles.
If the cause of your hair loss is DHT, which is the case for most men, then extra biotin will have no effect on that underlying process.
When is biotin useful?
There are situations where biotin can actually help:
If you have a demonstrable deficiency. This is rare in Western countries. A varied diet typically contains enough biotin through eggs, nuts, seeds, and meat. But it does exist: people with specific bowel conditions, long-term use of certain medications, or after major surgery can develop a deficiency.
If your hair loss has a different cause. Hair loss due to a biotin deficiency looks different from DHT-related baldness. You lose hair diffusely over the entire head, not in the typical pattern of receding hairline and thinning crown.
If you are in doubt: a blood test at the GP can show whether you actually have a deficiency. If so, supplementation makes sense. If there is no deficiency, then no.
How do you recognize the difference?
Male pattern hair loss due to DHT follows a recognizable pattern: the hairline recedes at the temples, the crown thins, and these two areas slowly merge. This pattern follows the so-called Norwood scale.
Hair loss due to a nutrient deficiency, including biotin, is diffuse. You lose hair over the entire head, not in a specific pattern. The hair becomes thinner and brittle, but the hairline does not specifically recede.
If your hair loss fits the Norwood pattern, it is unlikely that biotin is the cause.
What actually works then?
If you want to tackle DHT-related hair loss, there are ingredients that have been specifically researched for it. Redensyl works at the level of the hair follicles themselves, stimulating stem cells at the hair base to become active again. Procapil focuses on the blood supply to the hair follicles and inhibits local DHT activity. Baicapil supports the anagen (growth) phase of the hair cycle.
These are different mechanisms than biotin and they are specifically developed for the type of hair loss most men experience.
The Hairborn Growth Serum combines Redensyl, Procapil, and Baicapil in one product. Composed of ingredients with a scientific basis for the treatment of androgenetic hair loss.
Conclusion
Biotin is not bad. It is a vitamin your body needs. But as a supplement for hair loss, it only works if you actually have a deficiency, and that is not the case for most people.
If your hair loss follows the typical male pattern, biotin is not the solution. In that case, ingredients that specifically target DHT and hair follicle blood flow, such as Redensyl, Procapil, and Baicapil, are a better choice.
Are you unsure if you have a deficiency? Ask your GP. A simple blood test will provide clarity.