jmb73, My bloodwork was all over the place after Covid. They thought I was pre-diabetic, that I needed a liver ultrasound and that my pituary gland had stopped working. My cortisol level was extremely high. I explained about just getting over Covid and a month later, all my bloodwork was back to normal. I have heard this from others as well after Covid. I did not do well with the anti-thinning shampoos, but, please see what I wrote about hair loss after Covid that has helped me. I know it's scary, but, it does eventually stop thinning/shedding so much. This nasty virus effects so many things in our body. If you have thyroid issues, do not take Biotin before you have bloodwork done or your thyroid levels will be off. Come off of it for at least a week. Biotin, personally did not work for me for hair loss. Blessings & Prayers.....