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Hi Jack, yes some of the side-effects of Propecia can be quite scary and definitely not worth it in my opinion. I would suggest that you slowly transition into more natural methods that I talk about here on the blog and in detail in my program Hair Equilibrium. I have personally found them to be just as effective as Propecia but instead of horrible side effects, the natural method gives amazing benefits such as glowing health, energy and wonderfully healthy hair. My philosophy is that hair loss is unnatural, and is a symptom of an imbalance in your body. Trying to fix the problem with a pharmaceutical can only have bigger, more disastrous long term consequences. Pumpkin seed oil is a good place to start swapping drugs for plant based alternatives.
A key aspect of hair loss with age is the aging of the hair follicle.  Ordinarily, hair follicle renewal is maintained by the stem cells associated with each follicle. Aging of the hair follicle appears to be primed by a sustained cellular response to the DNA damage that accumulates in renewing stem cells during aging.  This damage response involves the proteolysis of type XVII collagen by neutrophil elastase in response to the DNA damage in the hair follicle stem cells. Proteolysis of collagen leads to elimination of the damaged cells and then to terminal hair follicle miniaturization.