Selenium is essential for hair loss as well as immunity. Selenium deficiency is rare in the US but can happen if you have hypothyroidism, or HIV, are on dialysis, or have a GI condition like Crohn’s. You should include cashews, almonds, and dry fruits in your diet for a week. So that you include selenium in your body and you are very fit. Also, it is straightforward for you to have selenium in your diet, and it isn’t nice, so you use it according to your body or your immunity. If you include selenium in your daily diet, your hair fall will also stop.