JP Fitness Forums - View Single Post - Multi-vitamins or not

NeilC · 10-09-2008, 05:37 AM

I've seen studies implying there might be some negative effects to supplementation. For instance there is one showing that taking zinc supplementation for long periods suppresses the immune system. There was one about how reducing copper intake slows the growth of tumors which might imply that supplementing could increase the speed of their growth, should you get one. There was that study showing vitamin E increased lung cancer risk. There was a danish study of antioxidant vitamins showing no benefits and some risks: Vitamin A supplements increased the risk of early death by 16% and beta carotene by 7%.

I've not delved into these to see how valid they are but it demonstrates that the subject isn't as simple as it might appear.

Also there is the suggestion that some combinations of minerals cannot be absorbed well and should be taken separately.

10-09-2008, 05:37 AM	#8 (permalink)
NeilC Member Join Date: Jul 2006 Posts: 89	I've seen studies implying there might be some negative effects to supplementation. For instance there is one showing that taking zinc supplementation for long periods suppresses the immune system. There was one about how reducing copper intake slows the growth of tumors which might imply that supplementing could increase the speed of their growth, should you get one. There was that study showing vitamin E increased lung cancer risk. There was a danish study of antioxidant vitamins showing no benefits and some risks: Vitamin A supplements increased the risk of early death by 16% and beta carotene by 7%. I've not delved into these to see how valid they are but it demonstrates that the subject isn't as simple as it might appear. Also there is the suggestion that some combinations of minerals cannot be absorbed well and should be taken separately.