Vitamin A is recommended to supplement vitamin A in plants, because it will not lead to excessive poisoning. Foods include broccoli, carrots, amaranth and lettuce, and fruits include mangoes and oranges.

Vitamin d, it is recommended to take the sunshine supplement method. Ultraviolet light can convert cholesterol in skin cells into vitamin D, which is also to avoid excessive poisoning. Foods with high vitamin D content include cod liver oil, eggs and deep-sea fish.

Nicotinic acid, nothing special to say. Rich foods include milk, eggs, fish, lean meat and phytophagous foods, most of which are stored in seed coat. After processing, it will be a big loss ~