2 doctors weighed in:
Which calcium supplement may contain lead and other toxic metals?
2 doctors weighed in

Dr. Sunil Prof. Wimalawansa
Internal Medicine
1 doctor agrees
In brief: Shell-based calcium
Calcium preparations that are prepared from seashells and oyster shells may contain toxic components, such as mercury, cadmium, and lead.
Please check the USP mark on a supplement indicates that it meets governmental standards for purity and quality.

In brief: Shell-based calcium
Calcium preparations that are prepared from seashells and oyster shells may contain toxic components, such as mercury, cadmium, and lead.
Please check the USP mark on a supplement indicates that it meets governmental standards for purity and quality.
Dr. Sunil Prof. Wimalawansa
Dr. Sunil Prof. Wimalawansa
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