Premature greying of hair is defined as hair that greys before the age of 20 in Caucasians and 30 years in African-Americans, with no set criteria for Asians . Please speak with your doctor prior to trying any supplementation for yourself or your family.
Possible Nutritional Causes
The possible causes of premature greying include the following. Please click the links for more information the nutrient as well as dietary sources / foods to include that nutrient in your meals.
- Vitamin B-12 deficiency 
- Reactive Oxygen Species (ROS) 
- Low protein intake 
- Low caloric intake 
- Iron deficiency 
- Copper deficiency 
- Low calcium levels 
- Low Vitamin D3 levels 
- Zinc deficiency 
- Low HDL Cholesterol  (those aged less than 25 years)
Additionally, non-nutritional causes include smoking, ultraviolet radiation, alcohol consumption and decreased level of thyroid hormones .
Further, premature greying of hair may be associated with risk of cardiovascular diseases, especially for smokers  and hearing loss .
This supplement may help fortify existing levels of some minerals and could help with prematurely greying hair. The topical application of ferrous sulphate appears to have had success in the reversal of premature greying in children . See this article on hair loss for a suggestion of a balanced daily diet which will help keep up your levels of essential micro-nutrients – the causes of hair loss and premature greying appear to have nutritional overlaps .
If you have any questions, please mention them in the comments below and I’ll do my best to answer them.
- Premature Graying of Hair: Review with Updates
- Premature Graying of Hair: An Independent Risk Marker for Coronary Artery Disease in Smokers – A Retrospective Case Control Study
- Factors Associated with Premature Hair Graying in a Young Indian Population
- Epidemiological and Investigative Study of Premature Graying of Hair in Higher Secondary and Pre-University School Children
- A Case of Premature Hair Graying Treated with Ferrous Sulfate
- Nutrition and Hair Loss