while MPB is manifested by DHT, it's actually genetic. also, hairloss is experienced by steroid users that arent on testosterone...because synthetic analogs of steroids can also degrade hair follicles and cause hairloss.
there a couple of issues here...one is that h-drol apparently does not strictly convert to oral turinabol, like its chemical structure suggests. there is apparently some other binding and/or conversion happening, which serves to explain h-drol's potency (h-drol @ 100mg shouldnt even come close to 50mg of OT, but it's actually stronger, and considerably more androgenic. these are my observations, but i believe others have reported similar results)
also, the 4-chloro modification on ther A-ring of a dbol molecule isnt proven to completely inhibit reduction or aromatization. it obviously reduces it, but the jury is still out on how complete it is.
this is really far off.
1) boldenone never converts to test. neither does 1,4ad, or what you are calling "Bold". boldenone is its own steroid and has its own structure.
2) no boldenone product is fine for hair for all users. boldenone preferentially converts to the beta-analog of what we know as 1-Test (dehydroboldenone) because it doesnt have any affinity for 5AR, only 5BR. it's odd i know, but the end result is that lots of people notice hairloss on boldenone, and if a sufficient dose of 1,4ad is used, the same would be noticed. finasteride has very little impact on boldenone. i know i've used it many times with it. i always have to reduce my EQ dose on a test+finasteride cycle, because the itchiness kicks in and i cant do anything about it.
19-nor steroids and PHs never convert to DHT. they can't. deca can convert to DHN (which is actually good, as it has virtually no androgenic potency)..the same goes for any prohormone to deca like 19-nor-diol. these are good choices for the MPB-challened, although the lack of androgenicity means you'll get little to no libido support (ie. your **** might not work)
tren and its analogs are already 5a-reduced and are VERY potent androgenically. they are terrible candidates for someone concerned about their hair.