Right before surgery, you can keep taking your supplements, except for omega-3s, vitamin E and - garlic, as these can thin the blood and cause clotting problems. I would also avoid taking very large amounts (above 2g) of vitamin C, since this might make the anaesthetic a little less effective. As for eating well after surgery; there are plenty of no-chew options. Try smoothies made with fruit, ground nuts and seeds and yoghurt, or Get Up & Go! whizzed up in the blender with dairy or soya milk and fruit. Soups blended with silken tofu are good too.