There are many supplements you may use. But I know one of them as my grandmother was suggested by our doctor after her surgery. Our doctor suggested us this site where the supplements are easily available. And this supplement helped her to stay energetic and healthy.
There are various Vitamins, you can use, but before consuming it you should take a suggestion from your doctor regarding it. I do not use vitamins, but as per my knowledge Vitamin C supplementation is highly recommended by experts. It helps promote healing and it is the key nutrient required for making collagen, which is what heals your tissue together.