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3 males) and cow (Bos Taurus

This is a theoretical concern raised by the biology, not a demonstrated harm in humans for either compound, and it should be described as exactly that an unresolved question that the absence of long-term human data leaves open, not a proven risk and not a reason for false reassurance either

On average, adults need about 2.4 micrograms per day

1 NOTE : Different manufacturers use different terms for tablets that are meant to dissolve sublingually in the mouth, but sublingual is considered a pharmaceutical term by the FDA, so dietary supplements are not allowed to 'label' using that word