Assertion: zinc's effect | /r/HasProperty | found with 300 mg/d
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text: Although there are no studies showing people are actually more likely to get sick or experience worse illnesses on high-dose zinc, the negative effect on lymphocyte proliferation found with 300 mg/d and the apparent safety in this regard of 150 mg/d suggests that the potential for hurting the immune system may begin somewhere between 150-300 mg/d.