Person runningThough the NHS recommends most adults consider taking vitamin D until around March as daylight hours shrink, the service also noted: “There’s little evidence that supplements such as vitamin C, echinacea or garlic prevent colds or help you get better more quickly.”That’s not to say that eating a balanced diet, including getting enough vitamin C, isn’t key to supporting your immune system: it is.It’s just unlikely to provide the short-term “boost” many people who begin taking the supplement in autumn hope it will.So what does help to build a strong immune system? I asked two doctors whose answers had a surprising amount in common.Ditch the idea of short-term immune “boosts” Speaking to HuffPost UK,