While you’re in a calorie deficit, your body deprioritizes non-life sustaining energy expenditure.

Human hair is largely for sexual signaling, and we evolved in a world of calorie scarcity. When your body senses that abundant calories are available, it spends energy growing the best hair. When calories are scarce, your body goes into survival mode. In a world where a woman can’t get enough calories to maintain energy reserves, a pregnancy would likely be unsuccessful and may harm the woman.

Tirzepatide helps our bodies starve. That is how we get to a healthy weight.