my itching stopped a few yers after MBP started for me... around 20 years ago in 2001 male pattern baldness started.Yes, niacin reduces the level of cholesterol, which, when accumulated in the vessels, clogs them, creating obstacles to the flow of blood through the veins and arteries (In general, balding men have a higher risk of cardiovascular disease, there is enough research on this topic.). It also has a positive effect on the nervous system, which, as you know, is damaged in all balding people, in general, cortisol has a negative effect on hair. About dgt, you can block it with finasteride.
If you have itching, use it as an indicator, if something starts to help you, you will determine it by how the itching stops bothering you and vice versa.
Since then i havent totally lost it... just thinning... Recently after staring MSM and fish oil itching is not present.