vitamin a deficiency

absorption acne beta blindness body carotene carotenoid carotin carrot data deficiency design diet dietary disease dry epithelial eye fat fatigue food graphic growth hair health healthy human hyperkeratosis icon illustration immune impaired impairment infographic insomnia kale lack loss low medical medicine melon night nutrition pumpkin reduced retardation retinoid retinol set shortcoming sign skin soluble source supply symptom system tissue tuna vector vision vitamin weight