Dr. Boz [Annette Bosworth, MD] - Thinning Hair? 4 Hormone Deficiencies

Short Summary

Main recommendation: Dr. Annette Bosworth argues that keto-related hair loss is usually a temporary stress response, and that the way to recover is to lower insulin so fat-based hormones are released to support new hair growth, rather than buying expensive shampoos or treatments. She ties the process to four hormones and to chronic inflammation as a major driver of follicle stress.

Key Points

• The four fat-based hormones named in the transcript are progesterone, aldosterone, estradiol, and testosterone, all made from cholesterol, with vitamin D also mentioned as a hormone that is replaced first in patients with hair loss.
• High insulin causes these fat-based hormones to be stored in fat cells, so they cannot reach the hair follicle even if present in the body.
• Ketogenic eating lowers insulin, releasing these hormones from fat cells into circulation so they can reach the follicles.
• Hair follicles move into a dormant (catagen) phase when stressed, and stress includes weight loss, the shock of starting keto, and chronic inflammation, not only work or home stress.
• Hair loss on keto often begins a few weeks in and is driven by the stress of the metabolic shift, but the follicles are regrowing beneath the skin.

Details Worth Noting

• Concrete instructions: Do not keep quitting keto because of early shedding; the video says the patient should continue, since hair is regrowing under the skin. Do not buy expensive shampoos or treatments to fix this; the speaker says she does not believe they cause the regrowth. Wait, because hair takes about three months to push through the skin and the regrowth will be better than before once healthy fat-based hormones are supplied. Check sleep and current stress levels, as the speaker asks patients about these first. Consider the role of chronic inflammation, which the speaker identifies as the worst kind of stress on follicles.
• Pathological hair loss is described as hair falling out because hormones are not reaching the follicle fast enough to produce new hair, and the speaker uses a chart to distinguish normal, pathologic, and worsening patterns.
• The hair growth cycle includes an anagen (growth) phase, a catagen phase, and a telogen phase, and the transition out of catagen can take variable time depending on a person's health.
• The speaker says that if a patient is already insulin-resistant, the ketogenic shock is more likely to cause a hairbrush full of hair early on.
• The video does not give specific doses, amounts, or supplement protocols; it only names vitamin D as the first hormone the speaker replaces in patients with hair loss, and refers viewers to another video for details. This is the speaker's clinical perspective and is not presented as professional advice.

Bottom Line

Early hair shedding on keto is presented as a temporary stress response tied to insulin and hormone shifts, and the video's main message is to be patient, since regrowth is already happening beneath the surface.