In daily life, common foods rich in B vitamins include oats, black beans and animal offal such as pig liver. 1. Oats: a common cereal food, it is rich in B vitamins, of which the content of vitamin B₁ is 0.3 mg/100 grams, vitamin B₂ 0.13 mg/100 grams, niacin 1.2 mg/100 grams. 2. black beans: it is also rich in B vitamins, including vitamin B₁ content of 0.2 mg / 100 grams, vitamin B₂ 0.33 mg / 100 grams, niacin 2.0 mg / 100 grams. 3. Animal offal: such as pig liver is also rich in B vitamins, of which the content of vitamin B₁ is 0.21 mg / 100 g, vitamin B₂ 2.08 mg / 100 g, niacin 15 mg / 100 g. All of the above foods are rich in B vitamins, but they are not recommended if there are allergies to the above foods.