Vitamin deficiencies can sometimes be self-diagnosed.
Vitamin A (retinol) deficiency is accompanied by dry skin, brittle hair, transverse nail stripes, eye disease, night blindness (reduced vision in the dark), gastritis, diarrhea, and in children a slow physical and intellectual development.
About the lack of vitamin E (tocopherol) will show increased capillary permeability and fragility, when even minor injuries appear, and do not go long bruises, muscle weakness, pallor.
Lack of vitamin D (calciferol) may be accompanied by seizures, impaired psychomotor reactions, a tendency to fracture bones and their slow healing. Children may develop rickets, which disrupts bone formation and deforms the skeleton.
Vitamin C (ascorbic acid) deficiency will manifest itself as general weakness, rapid fatigue, frequent colds, bleeding gums and long healing of wounds and cuts.
Vitamin B1 (thiamine) deficiency is indicated by irritability, impaired appetite and sleep, muscle weakness, mental changes.
Vitamin B2 (riboflavin) deficiency is characterized by cracks on the lips and corners of the mouth, a feeling of "sand in the eyes", photophobia, impaired color perception. Vitamin deficiency can cause anemia.
Because of a lack of vitamin B5 (pantothenic acid) appears dry and flaky skin, graying and loss of hair, a constant feeling of fatigue. There may also be gastrointestinal disorders.