On Jan. 20, the FDA publicly posted a warning letter to Dayan Goodenowe and his company Prodrome Sciences USA, LLC, which manufactures pills and oils that he has claimed can help stop and reverse the progression of conditions like ALS, Alzheimer’s and autism. The FDA says that between 2020 and 2021, Goodenowe enrolled 29 people in a clinical trial evaluating whether his product, ProdromeNeuro, was safe and tolerable for patients with mild to moderate dementia.