vitamin d is kinda different. i agree with you for most vitamins... but d is interesting the way they make it. and i can confirm it works. > vitamin d can be made in a lab by exposing 7-dehydrocholesterol to ultraviolet light. the 7-dehydrocholesterol is extracted from lanolin, a fatty substance from sheep's wool. the reaction is performed in a sealed box to protect the eyes from the damaging ultraviolet light. so you see it really isn't synthetic. they are extracting it from the skin of animals.
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