Harry begins by drinking blood from raw steaks, but as the episode progresses, he learns from Austin and Belle Noir that he will eventually need fresh human blood to satisfy his mineral-depleted system.
Frustrated by her own inability to master a difficult violin piece, Harry’s nine-year-old daughter, Alma, steals and takes one of his pills. [S10E2] Pale
The episode explains that the mindless, hairless creatures wandering Provincetown are actually people who took the pill but lacked true creative talent, causing them to "de-evolve" into monstrous, bloodthirsty husks. Harry begins by drinking blood from raw steaks,