Garlic has a high nutritional content for its size, with significant amounts of vitamin C, selenium, manganese, and iron. There is also some evidence that consuming garlic may help strengthen the immune system, reduce risk for certain cancers, improve heart health, and even boost athletic performance. Swallow the garlic with a full glass of water. Since garlic has its own pungent flavour chewing into it, may get a bit too much for some. It is advisable to swallow a small chunk with water. Starting the day with lukewarm water can kick-start metabolism too. To maximize the health benefits, you should crush the garlic at room temperature and allow it to sit for about 15 minutes. That triggers an enzyme reaction that boosts the healthy compounds in garlic.