Pregnancy and Glyconutrient Supplements?

Can anyone tell me whether there is any evidence supporting the safety of glyconutritional supplements during pregnancy?

Can anyone tell me whether there is any evidence supporting the safety of M*******h's glyconutritional supplements, which include other ingregients, during pregnancy? Manna-C states not to use it during pregnancy and Catalyst says not to use for young children. Other brands of shark cartiledge (which I believe is in A*******e and therefore most M*******h products) say not to use during pregnancy as a caution.

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