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Zinc · Swanson
Zinc Picolinate 22 mg
ModerateOverdosed
What the lab found
Contained 31.8 mg zinc per capsule instead of listed 22 mg (144.6% of claimed amount). The 44.6% overage reflects poor manufacturing quality control.
Failure type · Overdosed
Active ingredient measured significantly above the labeled amount, exceeding tolerable limits.
Source
Independent lab testing, 2024