This is the first in a series of ingredient spotlights, short profiles of the individual terpenes that appear across the Purus range. Naturally, we are starting with the most famous of them all: limonene.
What limonene is
Limonene is a terpene found in extraordinary abundance in citrus peel. Squeeze the skin of an orange near a candle flame and the fine mist that flares up is mostly limonene, the same compound that makes your hands smell bright for an hour after zesting a lemon. It is one of the most common terpenes in nature and one of the most widely used aroma compounds in the world.
The form we work with is d-Limonene, the variant responsible for that unmistakable fresh-orange character. It is prized by perfumers for top notes, by confectioners for citrus lift, and by drink makers for the way it makes a glass smell alive before the first sip.
Where you will find it in the wild
Orange, lemon, lime, mandarin and grapefruit peels are the classic sources, but limonene turns up in more surprising places too, including juniper and some pine species. If a plant smells fresh, zesty and clean, there is a fair chance limonene is part of the reason.
It is also a good example of how a single terpene changes character in context. In a lemon tart the same molecule reads as pastry-shop brightness; in a gin it reads as botanical crispness. Aroma compounds are team players, and the blend around them decides what they become.
Where it sits in the Purus range
At Purus, d-Limonene is one of the three terpenes in our Calm Apple sparkling drink, layered with beta-Myrcene and beta-Pinene beneath the apple flavour. It is doing exactly what limonene does best there: lifting the aroma, sharpening the first impression and keeping a zero sugar drink tasting bright rather than flat.
Because the range is caffeine free and preservative free, there is nothing in the can to shout over the botanicals. What you smell when you crack a Calm Apple is, in large part, this molecule at work.
Taste it for yourself
The nice thing about terpene education is that the homework is delicious. Pour a Calm Apple over ice, take a second to actually smell it before you sip, and see if you can pick the citrus-zest note riding above the apple. That is limonene.
If you missed our introduction to terpenes as a family, start with What Are Terpenes? A Plain-English Guide, or browse the full range in the shop. More ingredient spotlights to come.