Background. Vitamin B12 is an essential water-soluble vitamin that is commonly found in a variety of foods, such as fish, shellfish, meat, eggs, and dairy products. Vitamin B12 is frequently used in combination with other B vitamins in a vitamin B complex formulation.
Gas, bloating, intestinal cramps, and diarrhea are common effects of eating garlic, especially if you are sensitive to it. The supposed health benefits of garlic and the common myth that garlic is good for you does not apply if it makes you sick.
According to ConsumerLab.com, large doses of garlic can lead to upset stomach, facial flushing, rapid pulse, dizziness, allergies or insomnia, and can affect the mind and concentration.