This vitamin is synthesized by the body, but not in sufficient quantity. It must therefore be provided by the diet, especially as the body is not able to store it. The recommended daily intake of vitamin B8 for adults is 50 µg (60 µg for people over 75).
Biotin is most often found in trace amounts in animal and plant tissues. The foods that contain the most biotin are liver (130 µg/100 g) and eggs (25 µg/100 g), but it is also found in yeast, lentils and mushrooms.