Not taking care of your gut flora
While garlic is beneficial, it can’t counteract the harmful effects of a diet high in junk food and processed foods. These foods increase oxidative damage in your body and weaken your immune system. To maximize the benefits of garlic, be sure to maintain a healthy gut flora by consuming fermented foods like Greek yogurt, kimchi, sauerkraut, miso, and kombucha, or by taking probiotics.
Cooking garlic incorrectly
Allicin, the active ingredient in garlic, is destroyed by heat. Therefore, to benefit from its healing properties, it is recommended to add garlic to your dishes during the last 5 to 10 minutes of cooking, or even better, to consume it raw.
Do not consume garlic on an empty stomach.