You're right - it's title should be King of Androgens, not hormones. And yes, deactivation does make it less potent than testosterone at building muscle. I have this suspiscion though, that the deactivation may actually not be a weakness but a potential strength just not clearly understood at this time. I get this idea that over long periods of time, DHT might actually be a way to build significant mass but indirectly and with much less suppression. Its hard to find research on DHT metabolites. Most bodybuilders reveiws I've read believe DHT in combination with Test is a good stack so why not have both unless androgenic sides are a concern.