Essential Biochemistry - Vitamins (Section 5 - No. 34)
Which of the following is a common sign of riboflavin (vitamin B2) deficiency?
Blurred vision
Cracks at the corners of the mouth
Bleeding gums
Bone pain
คำอธิบาย
Cracks at the corners of the mouth (cheilosis) are a common sign of riboflavin deficiency.