Gabes is right on target about the magnesium stearate. It used to be made from beef tallow, before mad cow disease came along. So after recordkeeping was imposed on the use of beef tallow, pharmaceutical manufacturers switched to "vegetable" sources, such as palm oil, cottonseed oil, or soy oil, and it became popular to add "vegetable sourced" after magnesium stearate on labels. These days, many manufacturers have dropped the "vegetable sourced" designation, because according to the "experts", soy oil is not considered to be an allergen, due to the claim that it supposedly does not contain any soy protein.Donna wrote:My concern with Drs Best Products is they do not say anything about being soy free, so I discontinued using them.
Consequently, just because a label does not list soy or "vegetable sourced" (or some other designation) on the label, does not mean that the magnesium stearate in it was not made from soy oil. Magnesium stearate is a very common ingredient in pharmaceuticals, because of it's flowability benefits.
For that matter, many other derivatives of soy may be included without being noted on the label because of the fact that soy oil (or soy lecithin) is not officially considered to have the allergenic properties that soy has. As Gabes pointed out, this is something that is almost impossible to pin down, because of ingredient sourcing variances.
Magnesium is commonly made from palm oil, but we have no way of knowing the source for sure, because of labeling conventions (and labeling loopholes).
Tex