What Is Mastic and Mastic Gum? The Tears of Chios

By Zuzka, mastic specialist at Masticlife · Updated October 15, 2026

In short: Mastic gum (Chios mastic, Μαστίχα Χίου) is the natural aromatic resin of the mastic tree, Pistacia lentiscus var. Chia, cultivated only in the south of the Greek island of Chios. Prized since antiquity for its woody-sweet taste and pine-like fragrance, it is used in food, cosmetics and oral care, and as a food supplement it contributes to the normal function of the digestive system.

A drop of resin from the mastic tree is a phenomenon that will amaze you when you see it for the first time. It is the resin of the Pistacia lentiscus tree that grows on the island of Chios. Enjoy its unique, naturally sweet and resinous taste, and its fragrance, reminiscent of pine trees and the fruits of evergreen forests. This resin is bound up with the rich history, the culture, the particular architecture, the people and the landscape of a small area surrounded by the sea.

What is mastic?

Chios mastic (Chios Mastic Gum) is the name for the aromatic resin extracted from Pistacia lentiscus var. Chia in the southern region of the Greek island of Chios. This 100% natural product is unique in many ways. It has been valued for its properties, and its use and trade have a thousand-year-old tradition. Because of the small area under cultivation, mastic is very rare.

Other names and spellings: mastic gum is also called Chios mastic, mastic resin and gum mastic. In Greek it is mastiha (also spelled mastika or masticha), and its raw pieces are known as mastic tears. See other names of mastic in different languages.

Mastic gum is a truly unique, all-natural substance used in a variety of ways: as an ingredient in foods and beverages, and in the cosmetic industry. As a flavoring agent it is mainly used in bakery products, confectionery, jams, ice cream, chocolate, beverages, tea and liqueurs, and as an ingredient in perfumes, cosmetic masks, toothpastes, mouthwashes, creams and food supplements (capsules and powder).

The secret of the island of Chios

Chios mastic: a “resin drop” that delights, soothes and smells! If there were a registered trademark for the island of Chios, it would certainly be the tree that produces this resin. It is a true gift of nature, which over the centuries often became a bone of contention between powerful rulers.

Mastic is the sap of the mastic tree, an evergreen from the family Anacardiaceae, genus Pistacia. It grows mainly on the eastern Mediterranean coast. Of this family, only the variety Pistacia lentiscus var. Chia is systematically cultivated in the southern regions of Chios, where it produces a resin known for its distinctive character.

The combination of the tree variety, the soil, the microclimate, the topology and the relief of this area is the “secret” of the exclusivity that characterizes this small corner of our planet.

PDO: Protected Designation of Origin

As an absolutely unique product linked to a specific, very small area, Chios mastic resin has been granted a Protected Designation of Origin (PDO). The PDO covers the authentic raw resin, tears and oil from Chios.

How is mastic gum extracted?

Incisions in the tree

The best-quality mastic is produced exclusively by hand, in a process that runs practically all year round. The most important and demanding phase is the notching of the bark of the trunk and the large branches during the summer months.

This natural aromatic resin is obtained in the form of drops from the notches cut with sharp tools in the trunk and large branches. The resin that flows out stays on the ground beneath the tree for about 20 days until it hardens; this depends mainly on the summer weather, above all sunlight and humidity. A fully grown mastic tree produces about 1 kg of resin per year.

Collection

The solidified raw material, the best-quality mastic, is collected from the ground beneath the tree (which is covered with white earth for this purpose) and from the trunk, then sorted by the size of the drops (also called crystals, tears or granules), which range from a few millimeters to about a centimetre in diameter. The pieces are then washed and cleaned.

Processing of the mastic gum

Processing and trade are consolidated in the Chios Mastic Growers’ Association (Énosi Mastichoparagogon Chiou), founded in 1938. Individual growers from the mastic villages transfer their entire harvest to the association’s local collector, who forwards it to the central office.

What does mastic gum look, smell and taste like?

Mastic gum is initially a clear, sticky sap that solidifies over time and takes on a yellow-brown color. The initial bitter taste turns sweet after a few weeks. This sweetness, combined with a distinct aroma, is typical of mastic. The mature resin is characterized by a strong woody-fruity aroma and a sweet taste.

Composition of the resin

The exact composition is not yet fully known. This unique resin consists of a wide spectrum of active and aromatic ingredients. The combination of more than 80 substances probably explains why mastic is used so widely around the world.

In particular, it contains:

• natural polymers
• volatile and aromatic substances that make up the essential oil
• terpenes, phytosterols and polyphenols
• and a number of other substances, some of which were discovered here for the first time in nature

It does not contain:

• Gluten
• Listed allergens (see the allergen statement)

History of Chios mastic

Antiquity

Chios mastic has been appreciated since ancient times for its characteristic taste and qualities. Documents show that mastic was the first natural chewing gum in human history: an organic gum chewed to clean the teeth and freshen the breath. It was also used to cleanse the skin of the face and body, and appears as an ingredient in many historical creams, ointments and cosmetic waters.

Dioscorides, the father of pharmacology

Dioscorides (1st century), considered the “father of pharmacology”, divided all medicinal materials into five categories. His work “On Medicinal Materials” remained authoritative until the 16th century. In it Dioscorides praises the qualities of Chios mastic and notes that chewing it contributes to fresh breath and oral hygiene. He also mentions mastic oil and its many uses.

The early centuries

From the 1st to the 7th century, the resin from Chios is referenced by physicians such as Oribasius, Aetius and Galen for uses that, under current EU food-supplement rules, we cannot describe here.

The Middle Ages

In the following centuries many pharmacists and botanists referred to the qualities of the resin. The widespread use of Chios tears continued through the Byzantine period.

Modern times

In modern times the mastic trade flourished across Europe. Many European writings of the 16th to 18th centuries (the knowledge of the apothecaries of the time) contain extensive references to mastic.

The present

Mastic gum and its properties have been the subject of clinical and laboratory studies and of articles in international scientific journals. Since 2014, the method and know-how of resin cultivation has been inscribed on the UNESCO Representative List of the Intangible Cultural Heritage of Humanity. Each year about 250,000 kg of resin are exported from Chios, mainly to the EU, the USA, the United Arab Emirates, Saudi Arabia and Australia.

Benefits of Chios mastic

As a food supplement, mastic:

• contributes to the normal function of the digestive system;
• contributes to oral hygiene.

The European Medicines Agency (EMA) has also published an assessment of mastic resin as a traditional herbal medicinal product (HMPC assessment EMA/HMPC/46756/2015). See all sources and references.

Masticlife products

The Masticlife brand brings the unique qualities of authentic Chios mastic to you in high quality.

Food supplements

Under the Masticlife brand, authentic Chios mastic comes in several formats, from 100% pure capsules to prebiotic blends, sachets, and combinations with vitamin D3 or mastic oil. Each is a food supplement that contributes to the normal function of the digestive system, so you can pick the format that best fits your routine.

• Mastic Strong&Pure: vegan capsules with 100% pure mastic gum and nothing else.
• Mastic+ Prebiotic: capsules with mastic gum and inulin (a prebiotic fiber).
• Mastic Comfort: sachets with pure mastic gum powder (800 mg per sachet) and prebiotics.
• Mastic+ Vitamin D3: capsules with mastic gum, inulin and vitamin D3.
• Mastic Vital Double Action: capsules with mastic oil and probiotic cultures.

About the vitamin D3 version: Vitamin D contributes to the normal function of the immune system and to the maintenance of normal bones, teeth and muscles, a useful everyday addition, especially in the darker months.

Looking for a longer course or a better value? See the full supplements catalog, including economy and multi-pack options.

Mastic gum crystals

These are the raw resin tears, most often chewed like a natural gum or used as an aromatic ingredient in Mediterranean cuisine. They come in large, medium and small sizes, all available in our e-shop.

ELMA chewing gum

ELMA stands for “elliniki mastiha”, Greek mastic. These are ready-made gums with mastic and mastic oil, in sugar-free and naturally flavored varieties. Browse the ELMA range.

Toothpastes

Toothpastes with mastic oil, for adults and children, are available in our toothpaste collection.

Cosmetics

The aromatic mastic oil is popular in hair and body care. Explore soaps, creams and massage oils in our cosmetics collection.

The uses of mastic

How is mastic gum used, and for what?

• Resin: chewing gum and as a spice
• Oil: cosmetics and oral care
• Powder: food supplement

Which mastic gum product should I choose?

Still curious about this natural wonder, or haven’t found your answer? Write to us via the contact form on the Contact page.

Frequently asked questions

Ready to discover the resin Chios has guarded for three thousand years? Start with pure capsules for digestion, or the raw tears straight from the island.