Biotin

Functions:

• Carbohydrate, fat and protein metabolism
• Fatty acid production
• B vitamin utilization

Deficiency:

• Depression,fatigues, nausea, hair loss, dry and scaly skin, muscular pain

Recommended Requirement 

• 30 micro gram
• High intake are rapidly excreted by kidneys.

Sources: 

• Meat, egg yolks, dairy products, dark green vegetables, cereals, also made by microorganisms inside intestinal tract