I Have This Daughter, 22 Years Of Age. Now 132lbs

I have this daughter, 22 years of age. Now 132lbs 5'6". Lost like 25-30 lbs in two months sometimes can eat real well. The most others can't eat one bite without heading to the bathroom. Was very strong. Now fragile. This has started in the last two months. Since moving on her own. The last time I saw this someone was being poisoned. She can't take a lot more.