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Subjects
- Deficiency diseases--Avitaminosis--Vitamin B deficiency.[remove]1
- Deficiency diseases--Diagnosis1
- Economics--Psychological aspects.1
- Educational films.1
- Joints--Diseases--Arthritis.1
- Medicine, Psychosomatic.1
- Medicine--Clinical medicine--Therapeutics--Orthomolecular therapy--Vitamin therapy.1
- Medicine--Diseases--Immunologic diseases--Allergy.1
- Medicine--Geriatrics--United States--20th century.1
- Medicine--Health--Nutrition.1
- Medicine--Societies, etc. 1
- Physiology--Nutrition.1
- Vitamin B complex--Niacin--Nicotinamide.1