which food contain biotin ?

Biotin, also known as vitamin H, is found in a variety of foods, including:

Organ meats such as liver and kidneys
Egg yolks
Nuts and seeds such as almonds, peanuts, and sunflower seeds
Legumes such as beans and lentils
Whole grains such as wheat bran and oats
Cauliflower
Sweet potatoes
Mushrooms
Bananas

Biotin is also produced by bacteria in the gut, and some individuals may obtain enough biotin from gut bacteria without needing to rely solely on dietary sources. However, the recommended daily intake for biotin is relatively low, and it's not usually difficult to obtain enough biotin from a well-balanced diet.