The Claim

Zinc lozenges that release negatively charged zinc species at physiological pH increase the duration of common colds by 4.4 days when the lozenges have a ZIA score of -55.

Source: Zinc ion availability--the determinant of efficacy in zinc lozenge treatment of common colds.

What the research says

Not yet evaluated

We are still looking at what the research says.

Supports
0score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

Zinc lozenges with a certain chemical property might make your cold last longer—specifically, about 4 extra days—instead of helping you get better faster.

See the scientific wording

Zinc lozenges that release negatively charged zinc species at physiological pH lengthen the duration of common colds, with lozenges having a ZIA score of -55 increasing cold duration by 4.4 days.

What the research says

1 study

  1. Study: Zinc ion availability--the determinant of efficacy in zinc lozenge treatment of common colds.

    The study looked at zinc lozenges and found that ones with a certain negative score (like -55) make colds last longer, exactly as the claim says.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.