Mastic gum is typically taken as 1 gram daily, split into two doses, either chewed as raw resin or swallowed in capsule form. The European Medicines Agency recognizes it as a well-established treatment for mild digestive discomfort at doses of 1 to 2 grams per day. How you take it depends on what form you’re using and what you’re hoping it will do.
Forms of Mastic Gum
Mastic gum comes in three main forms: raw resin tears, capsules filled with powdered resin, and loose powder. Each works a bit differently in practice.
Raw resin tears are small, translucent pieces of hardened sap from the mastic tree, grown almost exclusively on the Greek island of Chios. You chew them like regular gum. They start out hard and brittle, then soften as you chew. This form is the traditional way people have used mastic for centuries, and it’s a good choice if you’re also looking for jaw exercise or fresher breath alongside digestive benefits.
Capsules are the most convenient option and the form used in most clinical trials. They contain finely ground mastic resin and are swallowed with water like any other supplement. If you’re targeting stomach issues specifically, capsules deliver the resin directly to your digestive tract rather than having it partially broken down by chewing.
Loose powder can be mixed into water or smoothies, though the taste is resinous and slightly bitter. It’s less common than capsules or raw resin.
Dosage Guidelines
The EMA’s established dosing for digestive discomfort is 0.5 to 1 gram taken twice daily, for a total daily dose of 1 to 2 grams. This is the range with the strongest backing for everyday use.
Clinical trials exploring mastic gum’s effects on the stomach bacterium H. pylori have used higher doses. One study tested 350 mg three times daily, while another used 1 gram three times daily (3 grams total per day). A separate trial pushed even higher, at 1 gram four times daily. In the study comparing the two lower doses, the higher dose cleared the infection in about 38.5% of participants, while the lower dose achieved roughly 30.8%. These aren’t dramatic cure rates, but they show a dose-dependent effect.
If you’re new to mastic gum, starting at the lower end of the EMA range (around 1 gram per day, split into two doses) is a reasonable approach. You can increase from there based on how your body responds.
When to Take It
Timing advice varies depending on the form. For raw resin, chewing after meals for at least five minutes is a common recommendation. For capsules, taking them 15 to 20 minutes before meals on a relatively empty stomach may help the resin reach your stomach lining before food arrives.
One important detail: mastic gum appears to need an acidic stomach environment to work, particularly against H. pylori. A clinical trial that combined mastic with pantoprazole (a common acid-reducing medication) found that the combination actually failed to clear the infection. Researchers attributed this to the drug raising stomach pH, neutralizing the acidic conditions mastic needs to be effective. If you take acid-suppressing medications, this interaction is worth knowing about.
How Long to Take It
Most clinical trials have used a 14-day course. The EMA recommends seeing a healthcare provider if digestive symptoms persist beyond two weeks of use.
For general digestive comfort, many people take mastic gum on an ongoing basis, though long-term safety data is limited. Short-term use at standard doses is well-tolerated, and high doses have also been safe in clinical trials. There’s no established maximum safe dose, but the 1 to 2 gram daily range has the most consistent safety record in humans.
How to Chew Raw Resin
If you’re working with raw mastic tears, expect the first minute or two to feel like chewing a small pebble. The resin is hard and may crumble initially. Keep chewing, and it will gradually soften into a pliable, gum-like texture. The flavor is piney and slightly sweet, unlike anything you’d find in a regular gum.
Chew for at least five minutes per session. Some people chew for 15 to 20 minutes, particularly if they’re using it for jaw strengthening alongside digestive purposes. You can spit it out when you’re done, just as you would with regular gum. Three chewing sessions per day, after meals, is a standard routine.
Side Effects and Safety
Mastic gum is generally safe. Human clinical trials, even those using high doses, have recorded no significant adverse effects. The only notable reaction in humans has been occasional allergic skin irritation from mastic-containing patches applied after surgery, which isn’t relevant to oral use.
Animal studies paint a more cautious picture at very high doses over extended periods. Rats given large amounts of mastic for 13 weeks showed increased liver weight and changes in blood chemistry. Another rat study found kidney tissue changes at high doses. These findings haven’t been replicated in human trials, but they’re worth noting if you’re considering long-term, high-dose use.
If you take proton pump inhibitors or other acid-reducing medications, be aware that they may reduce mastic gum’s effectiveness in the stomach. The resin’s active compounds appear to work best in acidic conditions, and raising stomach pH undermines that mechanism. This doesn’t make the combination dangerous, but it may make the mastic less useful.