Try Some Proven Remedies
There are plenty of supplements, pills and potions that claim to boost immune function but hardly any have proven benefits. One of the few options backed by scientific evidence is garlic. Used to treat bacterial infections, high blood pressure and colds for thousands of years it is the organosulfides (naturally occurring chemicals found in garlic and onions), along with vitamin D help to stimulate the production of the immune cells, macrophages. Garlic can be taken as capsules or eaten raw and get some sunlight each day if you can to enhance its potential benefits.
Echinacea is another of the most commonly recommended herbal remedies for colds and flu. The antiviral and antibacterial herb that originates from America does have some research to support its use in reducing the duration of a common cold. The recommended dose is currently 3g a day. And then there is olive leaf extract, which has both anti-inflammatory and antimicrobial benefits. With double the antioxidant content of green tea, the olive leaf extract is another supplement sold for its potential immune-related benefits. While research supporting its use as a specific flu fighter is only in its early stages, it remains a powerful antioxidant supplement with no known side effects.