6. Sunlight
Speaking of fortifying the immune system, sunlight might just be one of the very best options available. Sunlight is highly effective for combating certain autoimmune diseases such as psoriasis and in one study, it was found to be as effective as cold and flu vaccinations! In short, vitamin D might be the secret to a stronger immune system and less illness!
Instead of sealing yourself away in the dark then, one of the best things you can do when ill is to sit in the garden and get some sunlight, making sure that you wrap up warm. Consuming a vitamin D supplement may also help.