Two ingredients, two different jobs
Zinc carnosine and mastic gum appear together on a lot of gut health labels, which makes it easy to assume they do the same thing. They do not. One is a synthetic chelate engineered to sit in the stomach. The other is a tree resin with a two thousand year history of chewing. Reading them as a single mechanism is the most common misunderstanding in this category.
What zinc carnosine is
Zinc carnosine, also sold as polaprezinc, is a chelate of zinc and the dipeptide beta-alanyl-L-histidine (carnosine). It was developed in Japan and studied there from the 1990s onward. The interesting property is not the zinc. It is the fact that the chelate dissociates slowly in gastric juice, so the zinc stays in the stomach longer than zinc from a standard salt would.
That residence time is the entire design intent. Zinc is required for normal tissue maintenance in the gastric mucosa, and delivering it in a form that lingers is meaningfully different from swallowing zinc gluconate, which passes through quickly.
Researchers have looked at zinc carnosine in relation to gastric mucosal integrity, and it is one of the few gut ingredients with a real clinical literature rather than only a traditional one. What that literature does not support is any claim about treating disease. The honest framing is maintenance of normal gastric mucosal function, and that is the framing we use.
What mastic gum is
Mastic gum is the resin of Pistacia lentiscus var. Chia, a tree grown almost entirely on the Greek island of Chios. Harvesting involves scoring the bark by hand and collecting the tears that form, which is why genuine Chios mastic is expensive and why supply is limited.
Chewing it is a Mediterranean habit that predates supplements by centuries. Modern interest focuses on its triterpenic acids and on laboratory work examining its activity against Helicobacter pylori in vitro. In vitro means in a dish. It is the earliest stage of evidence and it does not establish an effect in people. Anyone selling mastic gum as a treatment is overselling it.
What can be said fairly: mastic gum is a resin with a long record of traditional use and active laboratory research. That is a reason to be interested, not a reason to expect a clinical outcome.
Why they get paired with DGL
A third ingredient shows up in the same formulas. DGL is deglycyrrhizinated licorice, meaning licorice root with the glycyrrhizin removed. Glycyrrhizin is the compound responsible for licorice's effect on blood pressure when eaten in quantity, so removing it makes the root usable as a daily supplement.
DGL is included for the mucus side of the stomach's own defence system. Zinc carnosine addresses tissue maintenance, mastic gum brings the traditional resin, and DGL addresses the coating. Read as three separate mechanisms, the formula makes sense. Read as one mechanism, it does not.
Our Zinc Carnosine and Mastic Gum Capsules pair the two headline ingredients at 120 capsules. Our DGL gummies with zinc carnosine add slippery elm and marshmallow root for people who prefer a gummy, and our Mastic Gum gummies are the 90 count option.
You can browse the whole digestive line on the Digestive & Gut Health collection.
Reading the evidence yourself
Three habits separate useful reading from marketing.
- Check whether a study is in vitro, in animals, or in humans. Most mastic gum work is in vitro
- Check who funded it. Ingredient suppliers fund a lot of the literature in this category
- Check the outcome measure. "Improved comfort scores" is weaker than a measured change in a biomarker
Every lot we sell is third-party tested for identity, potency, heavy metals and microbes, with certificates available by lot number on our How We Test page.
FAQ
Is zinc carnosine just zinc?
No. The carnosine partner changes where the zinc goes and how long it stays there, which is the point of the chelate.
Does mastic gum need to be chewed?
Traditional use is chewing the resin. Encapsulated and gummy formats exist for people who dislike the taste and texture, and they deliver the same material.
What does DGL mean?
Deglycyrrhizinated licorice. The glycyrrhizin has been removed so the root can be taken daily without the blood pressure concerns associated with whole licorice.
Can these be taken with other supplements?
Zinc competes with copper for absorption at high intakes, and zinc is best taken away from high dose iron and calcium. A two hour gap is the usual advice.
How long is a fair trial?
Traditional use patterns run for weeks, not days. Give a gut formula four to eight weeks before drawing conclusions.
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.