While this can be a difficult topic to ask for help with, it is one that is definitely worth inquiring about. It is something you should talk about with your doctor as there are many health reasons this could be happening. With that in mind, you’ll need to dig deeper into the suggestions here to see which will be the best approach for you. The first baseline supplement to add would be vitamin D3. Vitamin D is needed to build hormones and may also improve blood flow. Second are the vital amino acids L-citrulline (or L-arginine) and L-carnitine. Common herbs used for erectile dysfunction include yohimbe, horney goat weed, tribulus, tongkat ali, and red ginseng.
Don’t forget the additional lifestyle changes of a balanced diet, regular movement/exercise, lowering alcohol intake, stopping smoking (harms blood vessel structure), and reducing/managing stress. Probiotics, ashwagandha and rhodiola have been known to be helpful for the latter.