Black garlic health product and preparation method thereof

The invention relates to a natural health product, in particular to a black garlic health product and a preparation method thereof. The health product is prepared by fermenting garlic per se at the temperature of between 68 and 72 DEG C and at the humidity of between 70 and 100 percent. The preparation method comprises the following steps: putting the garlic into a temperature and humidity adjustable box; controlling the temperature to between 68 and 72 DEG C and the humidity to between 70 and 100 percent; and fermenting the garlic, and obtaining the black garlic health product after one week. The black garlic is prepared by fermenting the garlic per se, has the oxidation resistance 10 times higher than the common garlic and the polyphenol content 10 times higher than the common garlic, has the effects of resisting fatigue and thrombus, delaying ageing, improving immunity and the like, and has high amino acid content and fragrant and sweet taste without pungency of the common garlic.