After doing a trial with Amazona and looking to become more masculine, it looks like there aren't terribly many options. I like the ability to flex between genders. Maybe a new Masculinizing item could be made for sapients looking for a masculine option. for fun, here's a punny example of what came to mind:
3x drinks similar to the amazona spread of lite / classic / extra
Man's Man. a lite drink to put hair on your chest. (Fine print states that actual hair might not be present, but you'll definitely be more of a male from drinking it)
Brute Force. a classic drink that gives you cojones. Side effects include extra chutzpah, a much faster refractory period, more virility, and possibly rut. Broad shoulders and the build of a body building soldier may result. a small fine print warning reminds users that condoms tend to break within 24 hours of consumption, and nearby females may ovulate.
Jungle Juggernaut. An Extra drink that makes you unstoppable. in addition to masculinizing effects, the voice becomes deeper, and alpha charachteristics manifest with repeated consumption. a small warning label indicates that the beverage may induce temporary fearlessness, lack of judgement, and permanent strength gain. Users have reported an inability to back down from insults leading to rowdy bar fights on rush worlds, consequently bar owners have posted signs warning of temporary bans for repeat offenders. No running away from combat for 24 hours.