So how do we harvest mastic?

Fri Apr 24 16:01:59 PDT 2026

[Nathan & Sons](https://nathanandsons.com/)

[Nathan & Sons](https://nathanandsons.com/)

HAPPY ARBOR DAY KAI! 🌳

Since today is all about trees, it’s the perfect time to share how one of nature’s quiet marvels makes its way into your hands.

[Evergreens](https://nathanandsons.com/products/remineralizing-gum)

That marvel is mastic.

Our mastic comes from the farms of a small island called Chios, in Greece.
The sap is harvested in the summer when it flows the easiest. 

[Mastic tears](https://nathanandsons.com/products/remineralizing-gum)

[Mastic tears](https://nathanandsons.com/products/remineralizing-gum)

When the bark of the mastic tree is carefully scored, the tree begins to “weep” small tears of sap.
 Don’t worry. This isn’t tree distress! It’s more like a well-timed spa treatment. 

When the bark of the mastic tree is carefully scored, the tree begins to “weep” small tears of sap.  
Don’t worry. This isn’t tree distress! It’s more like a well-timed spa treatment. 

[Click to visit Nathan & Sons](https://nathanandsons.com/)

Once the sap is ready, it is picked, sorted, and cleaned. The resin is washed several times and sorted even further to pick out dirty or discolored pieces.   
Some lovely old ladies do the entire process by hand from start to finish - and the process is done several times throughout the summer months until the fall.

Next, the resin is organized into small, medium, and large tears and is shipped to us in California.

Once the sap is ready, it is picked, sorted, and cleaned. The resin is washed several times and sorted even further to pick out dirty or discolored pieces. 
 Some lovely old ladies do the entire process by hand from start to finish - and the process is done several times throughout the summer months until the fall. Next, the resin is organized into small, medium, and large tears and is shipped to us in California.

[More evergreens](https://nathanandsons.com/products/remineralizing-gum)

[Underbrush Ingredients](https://nathanandsons.com/products/remineralizing-gum)

Once we receive the mastic, we re-sort and clean it again - also by hand.  
We grade the sap based on a flavor, texture, and chew rating system which allows us to properly mix the resin with the other saps we use.

We are looking for a consistent "final chew" texture which often requires carefully blending tears together with spruce sap which is graded on a similar system. This allows us to achieve a uniform chew across batches so that no pieces are too sticky or too brittle. 

Truly, using mastic in Underbrush is more of an art than a science. And we're still learning about it to this day! 

[TRY UNDERBRUSH TODAY](https://nathanandsons.com/products/remineralizing-gum)

Once we receive the mastic, we re-sort and clean it again - also by hand.  We grade the sap based on a flavor, texture, and chew rating system which allows us to properly mix the resin with the other saps we use. We are looking for a consistent "final chew" texture which often requires carefully blending tears together with spruce sap which is graded on a similar system. This allows us to achieve a uniform chew across batches so that no pieces are too sticky or too brittle.  Truly, using mastic in Underbrush is more of an art than a science. And we're still learning about it to this day! 

[TRY UNDERBRUSH TODAY](https://nathanandsons.com/products/remineralizing-gum)

[Bowl of mastic in Greece](https://nathanandsons.com/products/remineralizing-gum)

What we love most about mastic is that it’s a reminder: great things don’t always come from factories. Sometimes, they come from patience, craftsmanship, and a tree quietly doing its thing.  
So as you chew your next piece of Underbrush gum, you can thank a tree!

If you have any questions or just want to talk more about trees (we’re always up for it), feel free to reach out.

[TRY UNDERBRUSH TODAY](https://nathanandsons.com/products/remineralizing-gum)

What we love most about mastic is that it’s a reminder: great things don’t always come from factories. Sometimes, they come from patience, craftsmanship, and a tree quietly doing its thing.
 So as you chew your next piece of Underbrush gum, you can thank a tree! If you have any questions or just want to talk more about trees (we’re always up for it), feel free to reach out.

[TRY UNDERBRUSH TODAY](https://nathanandsons.com/products/remineralizing-gum)

[Even more evergreens!](https://nathanandsons.com/products/remineralizing-gum)

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Nathan & Sons, LLC 4420 Commodity Way Suite A Shingle Springs, California 95682
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