fb61bd32_Taking_Nutritional_Supplements__Reasons_for_Caution
[Clinical Problem] High Cancer Risk due to: chemical exposure, personal or family history [Potentially Harmful Nutrient] Vitamin A – retinol* Beta-carotene* Vitamin E [Reasons for Caution] 
High dose supplements of these nutrients have been associated with an increased risk of cancer in clinical trials and they should be avoided or used with caution in those at increased risk.
Minor Contraindications to Taking Nutritional Supplements
Reasons for Caution