Any of the following symptoms can be caused by a deficiency of BIOTIN:
[ ] Skin shiny, dry and scaly
[ ] Tongue purplish-red (magenta) swollen and painful
[ ] Nausea
[ ] Muscular pains
[ ] Mental depression
[ ] Poor appetite
[ ] Fingernails a pale colour, pale complexion
[ ] Sleeplessness
[ ] Irregular heart beat
[ ] Hair loss, brittle hair
[ ]Loss of skin pigment
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