When it comes to your daily (fine, twice-daily) Starbucks trip, there are plenty of choices to keep you caffeinated, satiated, or Instagram-ready, depending on your mood, energy levels, and need for #content. But sometimes, the best drinks aren’t the ones on the menu—they’re the secret ones only insiders know about. And if you find yourself sniffling and craving an immune-boosting kick that’s not on the menu, the bosses over at the ‘Bucks say there’s a hack you need to know about.

First, grab a bottle of Evolution Fresh’s cold-pressed Defense Up drink from the self-service fridge. Then take it to the barista and ask to have it blended with banana and ice. That’s it—you’ve got yourself a cold-fighting, potassium-filled, Vitamin C-packed smoothie.

The downside to this menu hack is that the pumped-up juice comes with some baggage, in the form of 27 grams of sugar. While it’s not a unicorn frappe-level sugar-bomb (yes, the Insta-obsession packed a whopping 59 grams), it’s not quite in the healthy snack zone, either.

So the next time your coworker swears her hacking cough isn’t contagious, consider a sneaky Starbucks run—just to be safe.

If you’re looking to improve your vitamin game, check out this guide to savvy vitamin shopping and consider the vitamin that can keep prevent bloating. Or make like Lo Bosworth, who swears by these vitamins to help curb her anxiety.