I learned my library card number by heart. 
Vitamin
Vitamin :  b7 (biotin, vitamin h)
Occurrence : liver, cauliflower, champignons, wholemeal products, eggs, avocado, spinach, milk
Lack : states of exhausting, skin inflammations, muscular pains, hair loss, nausea
Daily need : approx. 0,5 mg.      
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