There is evidence, new evidence that taking Vit A with D affects the absorption of the D. They compete for the same transporter.
I can't see any benefit from cod liver oil these days, with the new
Vit D products that are Vit D3 and very inexpensive. One can taylor their D dose more easily since cod liver oil will force you to take A with any increased dosing. High dose Vit A is not safe (retinol). Most people need more D than cod liver oil provides.
I have switched to ghee...for our stir frying. It is very inexpensive and available now at WalMart of all places.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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