Generally garlic is safe when taken in a regular diet. There is a small risk that can occur however when eating large doses of garlic daily, taking more than 4 cloves per day can affect the bodies platelets hindering them from forming clots. You should reduce use of garlic around 2 weeks before having any type of surgery and if you're taking anticoagulant medications.
Each culture independently discovered the herbs in there area that were beneficial to health and could treat specific health conditions. They built their healing herbs list over centuries of trial and error. An example would be a herb for increased energy from China would be ginseng. In Peru, they used maca root. In the United States they consumed bee pollen. And in India they used ashwagandha. Now, with the speed of the internet, we can learn about and buy any herb from any one of these powerful healing systems.
Survey data about how many cancer patients use alternative or complementary therapies vary from nation to nation as well as from region to region. A 2000 study published by the European Journal of Cancer evaluated a sample of 1023 women from a British cancer registry suffering from breast cancer and found that 22.4% had consulted with a practitioner of complementary therapies in the previous twelve months. The study concluded that the patients had spent many thousands of pounds on such measures and that use "of practitioners of complementary therapies following diagnosis is a significant and possibly growing phenomenon".
Eating a clove or two of fresh garlic a day may indeed keep the doctor away, in part because it has immune-boosting, antibacterial, antiviral, and anti-fungal effects. Many of garlic's therapeutic effects are derived from its sulfur-containing compounds, such as allicin, which are also what give it its characteristic smell. In general, garlic's benefits fall into four main categories: