Not true. A bunch of doctors went on YouTube about usefulness of hydroxychloroquine in their patients and got taken down by YouTube. Every person is unique and medications/supplements/food will work for some and not others. Best example is coffee. If you have gene that metabolizes caffeine fast then coffee is good for you and helps you because your body clears caffeine and reaps benefits of antioxidants in coffee. On the other hand if you don’t have that gene then caffeine lingers in your body and causes all sorts of damage and therefore drinking coffee is bad for you.