Ambrosia is a miracle food produced by the Andreenids in the 2002 He-Man and the Masters of the Universe Mike Young Productions series. Anyone who consumes ambrosia immediately transforms, temporanely gaining an immense boost in strength and magical power, to the point that Skeletor was able to outmatch He-Man in sheer muscle.
However, this power boost comes at a price. Ambrosia quickly turns toxic and causes its user to revert to their pre-consumption state, unless it is eaten by an Andreenid or a member of a closely-related species like the Arachna.
Indeed, the colour of ambrosia and of its light when becoming toxic is yellow, but from Webstor's eggs and children is violet because no toxic. Then, the Snake Men are positively affected because they've devoured that species, but of course, even in this case, its effects are limited.