Vitamins vs. minoxidil: who wins the battle for hair growth?

#Vitamin B7 vs. Minoxidil: Who Wins the Hair Growth Battle?

Hair loss is a common concern affecting people of various ages and genders. Among the most discussed solutions to promote hair growth are the use of minoxidil and vitamin supplementation. Below, we will explore both approaches in detail, backed by scientific studies, to help those looking for effective options to combat hair loss.

##Minoxidil: An Effective Topical Treatment

Minoxidil is an FDA-approved medication for the treatment of androgenetic alopecia. Originally developed to treat hypertension, one of its side effects was found to be hair growth, leading to its reformulation as a topical treatment. How it regrows hair is not fully understood; it is thought to widen blood vessels in the scalp and lengthen the growth phase of the hair follicle.

In a 48-week trial in 393 men, 5% minoxidil increased hair counts significantly more than 2% minoxidil or placebo (Olsen et al., J Am Acad Dermatol 2002). That trial studied men only. It is important to note that results may vary by individual and that consistency in its application is key to obtaining visible benefits. Common side effects include scalp irritation and unwanted hair growth on the face or body. The US product label says to stop use and ask a doctor if chest pain, a rapid heartbeat, faintness or dizziness, sudden weight gain, swollen hands or feet, scalp irritation or unwanted facial hair occurs, and that it may be harmful if used when pregnant or breastfeeding. It is advisable to consult a health professional before starting it.

It is important to say that this is a widely used treatment to address androgenetic alopecia, both in men and women. However, it is essential to understand that this medication is not suitable for all people or for all types of hair loss. It is not meant for people who have no signs of hair loss.

Although minoxidil has been shown to be effective in promoting hair growth in cases of androgenetic alopecia, its use is not without limitations. For example, its effectiveness is greatest in people under 40 years of age whose hair loss is recent. According to MedlinePlus, "Minoxidil is most effective in people under 40 years of age whose hair loss is recent." In addition, its effectiveness may be limited in areas with extensive hair loss or in people who have experienced baldness for extended periods. It is essential that patients be evaluated individually to determine if minoxidil is the most appropriate therapeutic option for their specific situation.

For existing hair loss, and only while you use it

Minoxidil is for people who already have pattern hair loss, not for prevention in people without it. Once started, it has to be used continuously: the product label states that continued use is needed to increase and keep regrowth, or hair loss will begin again.

Is the combination of using minoxidil and taking vitamins a good marriage?

Combining the use of minoxidil with the intake of vitamin supplements, such as biotin, is a strategy that some people consider to address hair loss. However, it is essential to understand how these treatments interact and what evidence supports their use together.

The combination of topical minoxidil and biotin supplements has been studied to evaluate their joint efficacy in hair growth. A 2024 pilot study of 10 healthy men without hair loss (open-label crossover, 14 days per treatment) measured how fast hair grew with 5% topical minoxidil, 5 mg oral biotin, or both. It reported a small rise in hair growth speed only with the combination (Valentim et al., 2024). The study is far too small and short to show a real benefit in people with hair loss, and the authors called for further studies.

A 5 mg daily biotin dose also matters for another reason. Biotin and blood tests. The US Food and Drug Administration (FDA) warns that biotin supplements can make some laboratory blood tests give wrong results, including the troponin test used to diagnose a heart attack and some thyroid and other hormone tests (FDA safety communication, 2017, updated 2019). In a 2017 study, 6 healthy adults took 10 mg of biotin a day for 7 days; afterwards 9 of 23 biotin-based hormone and other blood tests gave falsely high or falsely low results (Li et al., 2017). If you take biotin, tell your doctor and the lab before any blood test.

Regarding scalp irritation associated with minoxidil use, no scientific evidence has been found to support that biotin helps mitigate these side effects. Irritation is often related to components such as propylene glycol present in some minoxidil formulations. To reduce these discomforts, it is recommended to consult with a dermatologist, who can suggest alternatives such as propylene glycol-free solutions or adjust the concentration of the treatment.

**Note: It is important to note that although biotin is an essential vitamin involved in nutrient metabolism, its additional supplementation in people without documented deficiency has not shown clear benefits on hair health. **

It is essential to differentiate who each treatment is intended for, since minoxidil and vitamin supplements, such as biotin, have very different purposes and mechanisms of action.

Who is best for hair growth?

If we're talking strictly about stimulating hair growth in cases of androgenetic alopecia, minoxidil is the treatment with the most scientific backing. It is meant for people who have already begun to experience hair loss. However, it is not a universal solution, as its effectiveness depends on the type and stage of alopecia, and requires continued use to maintain results.

On the other hand, vitamins and supplements are not designed to stimulate hair growth in people with hormonally-derived alopecia. Their role is rather to support hair health in those with specific nutritional deficiencies. If a person has a balanced diet and is not suffering from deficiencies, taking supplements like biotin will likely not have a significant impact on their hair.

Key Differences: Who is each for?

Minoxidil: For people with diagnosed androgenetic alopecia who are looking to reactivate growth in areas where hair is thinning or falling out. It is not for prevention in people with no signs of hair loss, and it works only while it is used. Vitamins and supplements: For people with hair loss related to nutritional deficiencies (for example, iron deficiency anemia, biotin or zinc deficiency). They are not used to treat androgenetic alopecia or enhance the effects of minoxidil. In conclusion, for hormonal (pattern) hair loss, minoxidil is the option with trial evidence. Vitamins, on the other hand, play a complementary role in specific cases of deficiency, but do not replace medical treatments.

Vitamins and Supplements: Support from Within

Proper nutrition is essential for hair health. Deficiencies in vitamins and minerals such as biotin, vitamin D, iron, and zinc have been associated with hair loss. For example, low levels of vitamin D have been linked to different types of alopecia, and some reports describe improvement with supplementation, but this has not been well tested. However, it is essential to understand that vitamin supplementation is most effective in individuals with specific deficiencies. For those without such deficiencies, excess of certain vitamins will not necessarily promote greater hair growth and may even have adverse effects. In addition, some supplements combine ingredients such as caffeine, saw palmetto extract, and other natural compounds that some small studies suggest may contribute to hair health. However, scientific evidence on the effectiveness of these supplements is limited and further research is required to confirm their benefits.

Conclusion: Which is the Best Option?

The choice between minoxidil and vitamin supplements largely depends on the underlying cause of hair loss. If hair loss is due to genetic or hormonal factors, minoxidil is the option with clinical trial evidence for stimulating hair growth. On the other hand, if hair loss is related to nutritional deficiencies, correcting these through a balanced diet or specific supplements can be beneficial. It is essential to consult with a dermatologist or hair health specialist to identify the precise cause of hair loss and determine the most suitable treatment for each individual.

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