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In other situations, lab testing is very important
If all three are in place, I proceed
Cloudiness can indicate contamination, incomplete dissolution, or an issue with the product itself
Despite the limitations, the Schillings tests were widely used until the mid-nineties
What You Need to Know Harvard Health Publishing: The A List for Vitamin B-12 Sources National Institutes of Health Office of Dietary Supplements: Vitamin B12 Grant Chu, MD, MS, MBA, FACP Medical Reviewer Grant Chu, MD, is an associate clinical professor at the David Geffen School of Medicine at UCLA
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