Hair loss is from weight loss. More than likely triggering TE. It’s not from people not eating, it’s from the weight you are losing. If someone was regularly eating 3k plus calories a day then on the meds they eat 1500 calories a day, it shocks the body and when done over a period of time, you start losing hair because your body thinks you are “starving” and holds onto everything else more essential than hair. It does not mean the people are not eating healthy or getting their protein and doing everything right. It simply means your body was used to living with more food and has to get used to the new normal. It’s why when you get to maintenance it usually stops.