That’s the two main things I’ve learned about scalp health. Blood flow. Which kidneys have a lot to do with. And having no microscopic parasites on the scalp. And not putting other bad crap on the scalp, like shampoo with SLS or alcohol in it.
And a third… Hormonal balance. Not having testosterone too low. I know that’s different from what people tend to say. Testosterone causes DHT causes hair loss… So opinions are out there. Choose your own. But looking as deep as I could into the issue, the other fringe opinion seemed more right to me. Hormonal imbalance causing hair loss. Low Testosterone not High. Still not concrete on that but it’s a lead at least.