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Ever heard of vitamin A intoxication ?
You thought much cod liver oil could be harmful ?
You'd better read this article
There is a big difference between synthetic vitamin A and vitamin A from natural sources. Most cases of vitamin A toxicity result from an excess intake of synthetic vitamin A in supplements, NOT the natural form of retinol (vitamin A) found in liver or cod liver oil.
There are no plant sources of vitamin A (carrots and other yellow/orange vegetables and dark-green leafy vegetables such as spinach and lettuce contain beta-carotene, not vitamin A); it is only present in animal products. If you follow my newsletter then you’ll know that I recommend cod liver oil as the best source of vitamin D (other than the sun, of course), but what you may not know is that it is also one of the best sources of vitamin A.
There is no need to worry about vitamin A toxicity if you take it in cod liver oil, and there are several reasons for this. First of all, as I mentioned earlier the main toxicity that can result from vitamin A is due to SYNTHETIC vitamin A, NOT the natural form found in cod liver oil.
Secondly, cod liver oil has vitamin D in it, and it is virtually impossible to become toxic on vitamin A if you take it along with vitamin D. As you can see in a study published in the December 2003 American Journal of Clinical Nutrition, vitamin D is associated with reduced vitamin A toxicity, and the vitamin D appears to protect against retinal toxicity.
This study also found that the safe upper single dose of retinol IN OIL seems to be 12,000 to 18,000 units of vitamin A per kilogram of body weight. The cod liver oil that I recommend has 1,000 to 1,250 units in a one-teaspoon serving, which means that you will be way under this limit if you follow my recommended dose (one teaspoon for every 50 pounds of body weight per day).
You thought much cod liver oil could be harmful ?
You'd better read this article
There is a big difference between synthetic vitamin A and vitamin A from natural sources. Most cases of vitamin A toxicity result from an excess intake of synthetic vitamin A in supplements, NOT the natural form of retinol (vitamin A) found in liver or cod liver oil.
There are no plant sources of vitamin A (carrots and other yellow/orange vegetables and dark-green leafy vegetables such as spinach and lettuce contain beta-carotene, not vitamin A); it is only present in animal products. If you follow my newsletter then you’ll know that I recommend cod liver oil as the best source of vitamin D (other than the sun, of course), but what you may not know is that it is also one of the best sources of vitamin A.
There is no need to worry about vitamin A toxicity if you take it in cod liver oil, and there are several reasons for this. First of all, as I mentioned earlier the main toxicity that can result from vitamin A is due to SYNTHETIC vitamin A, NOT the natural form found in cod liver oil.
Secondly, cod liver oil has vitamin D in it, and it is virtually impossible to become toxic on vitamin A if you take it along with vitamin D. As you can see in a study published in the December 2003 American Journal of Clinical Nutrition, vitamin D is associated with reduced vitamin A toxicity, and the vitamin D appears to protect against retinal toxicity.
This study also found that the safe upper single dose of retinol IN OIL seems to be 12,000 to 18,000 units of vitamin A per kilogram of body weight. The cod liver oil that I recommend has 1,000 to 1,250 units in a one-teaspoon serving, which means that you will be way under this limit if you follow my recommended dose (one teaspoon for every 50 pounds of body weight per day).
