Why zinc lozenge studies miss your capsule

Zinc lozenge trials used 80 to 207 mg of elemental zinc a day dissolved slowly against the throat, where local contact with cold virus tissue is the proposed mechanism. A swallowed daily zinc capsule like Moat's, at 11 mg, goes straight to the stomach and never touches the throat that way, so it is doing a different, everyday nutritional job rather than the lozenge job.

There is a set of zinc studies that supplement companies love, and a reason they do not apply here.

What did the lozenge studies use?

Trials of zinc lozenges have shown real reductions in how long cold symptoms last. Not trivial ones either.

They are a different product from a daily zinc capsule, though, so it is worth knowing what separates them.

What makes a lozenge different from a capsule?

Two things separate those trials from a typical daily zinc capsule.

The dose. Those studies used roughly 80 to 207 mg of elemental zinc per day. Our formula contains 11 mg. That is not a rounding difference, it is a different order of magnitude, chosen for a different purpose.

The delivery. Lozenges dissolve slowly in your mouth and throat. A large part of the proposed mechanism is local contact with the tissue where a cold virus is replicating. A capsule you swallow bypasses that entirely and goes to your stomach.

Different dose, different route, different intended job. Citing the lozenge result on a capsule label is borrowing credibility from a product you are not selling.

	Lozenge trials	Moat (capsule)	Keel (capsule)
Elemental zinc per day	80 to 207 mg	11 mg	20 mg
Common form	Zinc acetate, zinc gluconate	Zinc citrate	Zinc bisglycinate
Route	Dissolves against throat tissue	Swallowed, goes to stomach	Swallowed, goes to stomach
Intended job	Shorten a cold in progress	Everyday nutritional top-up	Everyday nutritional top-up

Why does the zinc form matter too?

Not all zinc is the same zinc. Zinc acetate and zinc gluconate were the common lozenge salts in those trials. We use zinc citrate in Moat, well absorbed, gentle at 11 mg, and meant to keep you topped up rather than to shorten an illness in progress. For the broader digestive-and-mineral habit, Keel uses 20 mg zinc bisglycinate, a chelated form dosed higher, which we write up in magnesium plus zinc together and iron, the right kind of gentle.

If you are comparing zinc labels, check the salt. Oxide is the cheapest; citrate and bisglycinate are the ones formulators pick when they are watching the form column. That is one of the things worth checking when you read a label.

Why 11 mg, then?

Because the capsule is doing the other zinc job, and it is a real one.

Zinc is an essential mineral involved in normal immune function and wound healing, and a daily nutritional amount keeps you topped up. The 11 mg is there to keep you topped up day to day, which is a quietly useful job.

What is the general rule?

When a study gets quoted on a bottle, three things are worth matching up: the dose, the form, and how it was taken. If all three line up, the study is describing the thing in your hand.

Ours is 11 mg of zinc citrate in a capsule, which is an everyday nutritional amount, and that is exactly what it is there to do.

Also worth knowing: more zinc is not better. High intakes over time interfere with copper absorption, which is a real problem rather than a theoretical one. The nutritional dose is the nutritional dose for a reason.

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The dose, the form and the lozenge-versus-capsule distinction are on the zinc ingredient page.

FAQ

Do zinc lozenges work for colds? In tightly controlled trials where lozenges dissolved slowly in the throat at 80–207 mg elemental zinc per day, symptoms were shorter. That does not transfer to an 11 mg swallowed capsule at a nutritional dose.

Is zinc citrate better than zinc oxide? Citrate is generally better absorbed and kinder than oxide at the same elemental amount. Bisglycinate (chelated) is the step beyond, which Keel uses at 20 mg.

Can I take more zinc to make a capsule act like a lozenge? No. Swallowing more zinc does not recreate lozenge contact with throat tissue and raises copper-depletion risk. Use the form for its actual job.

Sources

• Hemilä, Zinc lozenge and the common cold: a meta-analysis of two trials
• NIH Office of Dietary Supplements, Zinc fact sheet

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.