1. The Role of the Hair Follicle:
The hair bulb is one of the most active cells in the body. It requires a constant supply of nutrients, particularly B vitamins (Biotin, B6, B12), vitamins A, C, D, and E, and minerals such as iron, zinc, and selenium. A prolonged deficiency can slow the growth cycle.
2. Biotin, the most publicized.
Biotin (vitamin B8) is often presented as the “hair vitamin.” It plays a role in keratin synthesis. However, biotin deficiency is extremely rare in people with a varied diet. Biotin supplementation has shown no benefit in people who are not deficient.
3. The Marketing Effect:
Hair supplements are a booming market. Advertising campaigns promote a “miracle” vitamin to create a need. However, the science is much more nuanced.
4. The confusion between deficiency and supplementation.
Correcting a proven deficiency restores normal growth, but it does not stimulate supernormal growth. This is a fundamental difference.
In short: vitamins are necessary, but neither sufficient nor magical.
⚠️Hair signs you shouldn’t ignore:
If you’re interested in vitamins for your hair, it’s probably because you’ve noticed some changes. Don’t dismiss them. Here are the signs that should alert you:
Sudden hair loss (more than 100 hairs per day, or patches of thinning).
Hair that breaks easily, becomes dull, dry, or split.
Significant slowing of hair growth over several months.
Localized or diffuse areas of alopecia (bald patches).
Change in texture (hair that becomes thin, curly when it was previously straight, etc.).
Itching, redness, or flaking of the scalp.
Accompaniment of other symptoms: fatigue, paleness, brittle nails, dizziness.
