In humans , signs and symptoms of riboflavin deficiency -LRB- ariboflavinosis -RRB- include cracked and red lips , inflammation of the lining of mouth and tongue , mouth ulcers , cracks at the corners of the mouth -LRB- angular cheilitis -RRB- , and a sore throat .

LOCATION@1 deficiency can cause a sore red mouth , sores in the mouth -LRB- mouth ulcers -RRB- , cracked red lips , cracks at the corners of the mouth -LRB- angular cheilitis -RRB- , and a sore throat .
