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The Science of Healthy Hair, Hair Loss and How to Regrow Hair
Huberman Lab
The Influence of the Antigen and Catagen Phases on Hair Growth
During the catagen phase, hair is actually receding not from the top down to the skin surface and then into the root, but the other way. There's a change in that bulb region down below because normally there's an interface. And remember, there's blood vessels going into that area or rather capillaries that are feeding that area as well. We'll talk about the influences on the antigen and catagen phase in a moment.
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