Tassadar
The Overlord of Cakes & Toucans!
That or they just uplifted everyone...Well, my impression is that the Al Hazardans had a role in that. Mostly with… let's call it 'selective breeding'.
Taylor already has the basic tools for it.
For the quests... we likely can developed an safe serum for that role, just not within the limited time of the quest.True. But mutagen is way too risky for wide use. Unless it comes prepackaged with mutations already baked in. But even then there are risks.