This is a reminder for everyone taking D3 to please check the list of ingredients on their bottles of vitamin D3 to see they contain Cod Liver Oil (and therefore vitamin A). I just checked the list of ingredients on my huge bottle of D3 softgels that I got at Costco (Kirkland brand) a couple of weeks ago and saw that they contain Cod Liver Oil. What a bust! The bottle does not list vitamin A in the Supplement Facts section, only vitamin D3.
"Cod liver oil contains more vitamin A and more vitamin D per unit weight than any other common food. One hundred grams of regular cod liver oil provides 100,000 IU of vitamin A, almost three times more than beef liver, the next richest source; and 10,000 IU vitamin D, almost four times more than lard, the next richest source. Of course, cod liver oil is only consumed in small amounts, but even a tablespoon (about 15 grams) provides well over the recommended daily allowance for both nutrients."
The problem is that even small amounts of vitamin A negate the benefits of vitamin D. From the Dr. Cannell's latest newsletter:
"... the benefits of vitamin D are almost entirely negated in those with the highest vitamin A intake. And the retinol intake did not have to be that high in these older adults to begin to negate vitamin D's effects, about 3,000 IU/day."