Jul 27, · Sea kelp supplements are known to cause nausea and/or diarrhea in some people. If you experience negative effects, analed.xyz recommends that you discontinue use or switch to a lower dosage supplement. Pregnant or nursing women should avoid sea kelp supplements, as their safety in these situations has not been analed.xyzg: breast health. Feb 02, · In studies on rats, dietary kelp (seaweed) lowered estrogen production, a hormone needed for some breast cancers to grow. The studies also show that kelp can block the action of certain hormones.
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