The Science of Healthy Hair, Hair Loss and How to Regrow Hair | Huberman Lab Podcast

Minoxidil

Minoxidil is a popular treatment for hair loss, primarily working by increasing blood flow to the hair stem cells. Andrew Huberman explains that it is available in both oral and topical forms, with the latter being a 5% solution typically applied once daily 1. However, users must be cautious of side effects like dizziness and swelling, which can occur if the dosage is too high 2. Combining minoxidil with microneedling can enhance its effectiveness, especially in recovering hair in "dead zones" where stem cells are absent 3.

The combination of microneedling and minoxidil treatment together is far more effective than either of those treatments alone.

--- Andrew Huberman

This combination can take up to 50 weeks to show results, but it offers a promising solution for those struggling with hair loss.

   

Finasteride & Dutasteride

Finasteride and Dutasteride are two potent treatments for hair loss, each with distinct mechanisms and side effects. Andrew Huberman notes that Finasteride, available in oral and topical forms, works by inhibiting the enzyme 5-alpha reductase, reducing DHT levels and promoting hair growth 4. Dutasteride, on the other hand, inhibits all three isoforms of the enzyme, making it more potent but also more prone to side effects like reduced sex drive and increased estrogen levels 5.

Dutasteride works about two to five times faster than Finasteride.

--- Andrew Huberman

For those considering these treatments, starting with the lowest effective dose is crucial to minimize side effects while waiting for hair growth results.

   

Microneedling

Mechanical stimulation, particularly through microneedling, plays a significant role in promoting hair growth. Andrew Huberman describes microneedling as a process that uses tiny needles to create micro-injuries on the scalp, stimulating stem cells and enhancing blood flow 6. This method is especially effective when combined with chemical treatments like minoxidil, as it can reactivate dormant stem cells and promote hair growth even in bald areas 3.

Microneedling shows some positive benefit in both men and women, regardless of age.

--- Andrew Huberman

While not overly painful, microneedling can cause some bleeding, making it essential to consider both the short-term cosmetic implications and long-term benefits.