On the Brightside™ is a feel-good soda powered by Zembrin® – a single, standardized botanical curated for calm.

Cold. Straight from the can. No ice, no glass, no garnish needed. Just crack it and enjoy.

15 mg of Zembrin® – a patented, science-backed extract of Sceletium tortuosum (kanna).

Sceletium tortuosum is the South African succulent — commonly called kanna — that Zembrin® is derived from. It has a long documented history of traditional use among the Khoi-San people for lifting spirits.

Zembrin® is a specific, patented extract of a particular cultivar of this plant.

Water, crystallized lemon, citric acid, organic natural flavors, malic acid, Onosweet, vegetable juice (for color), and Sceletium tortuosum extract — which is Zembrin®, just as it appears on the legal ingredient label. That's it. The citric and malic acids are what give it that clean, slightly tart brightness that makes it taste like a real soda. No artificial anything. No weird aftertaste.

On the Brightside is sweetened with OnoSweet® — a patented, fermented Reb M derived from rice. Most "clean" sweeteners either peak in sweetness, leave a lingering aftertaste, or both. OnoSweet® doesn't — because the fermentation process produces a smoother, more consistent sweetness with zero glycemic impact.

All On the Brightside flavors contain zero sugar and zero calories.

Strawberry Sunshine — Strawberry. Lemonade. That first warm day of the season when you crack a window and remember that life is actually pretty good. Bright, familiar, immediately happy. The one you didn't know you needed until it's gone.

Guava Glow — Guava. Orange. Passionfruit. The feeling of a long weekend somewhere warm — even if you're at your desk. Tropical without trying too hard. A little unexpected, unmistakably golden. The one that makes Tuesday feel optional.

15mg per can. Zembrin® is self-affirmed GRAS (Generally Regarded As Safe) for beverage use at up to 50mg per day.

No. Kava (Piper methysticum) is a completely different plant from a different part of the world with different effects, different safety considerations, and a meaningfully different regulatory profile. They are not related.

No. Kratom (Mitragyna speciosa) is a different plant entirely. Different genus, different family, different effects, different regulatory landscape. On the Brightside contains no kratom.

Yes. Sceletium tortuosum is legal in 49 U.S. states and is not a controlled substance. Zembrin® is self-affirmed GRAS (Generally Recognized As Safe).

On the Brightside contains 15mg of Zembrin® per can.

Not exactly. The difference is standardization and traceability. Zembrin® is a specific cultivar with a specific alkaloid profile — high in mesembrinone — that is verified at harvest and consistent batch to batch. Generic kanna extracts vary widely. That consistency matters and it's why we chose it.

Yes. Vegan, gluten-free, zero sugar, zero calories, caffeine-free, and third-party tested.

Yes. Every batch is third-party tested for contaminants and to verify ingredient integrity.

South Africa. Zembrin® is traceable from individual seed to finished batch — each harvest is verified against the Zembrin® alkaloid "fingerprint" before it goes anywhere near production. It's also endorsed by the South African San Council, who hold the cultural and traditional knowledge of Sceletium tortuosum.

Right now, the best place is our website drinkbrightside.com. Independent retailers can shop wholesale via AirGoods.

Yes. Sign up for autoship and save 20% on every order, plus 50% off your first order! Cancel any time, no drama.

If there are any product manufacturing defects, major shipping delays, or damage of any kind, we will happily refund your purchase. We do not accept returns.

Email us at support@drinkbrightside.com and we will get back to you as soon as possible.