A PhD Says This Supplement Is The Secret To Success (She Took It Before Exams)

When you think of energy-supporting staples, beverages like coffee and tea likely come to mind. After all, with 96 milligrams of caffeine per cup of coffee and 28.8 to 48 milligrams per serving of tea (depending on the variety), these drinks certainly do the trick. It turns out, though, coffee cherries, coffee beans, and tea leaves aren't the only ancient nootropic plants with energy-lifting benefits. There is another nootropic botanical you'll want on your radar, for things like mental energy, alertness, and cognitive performance.*

"I'm originally from Brazil, so I love the guarana ingredient," Brownlow shares. "I don't see it often in products [in the United States], and it's something that's very common in Brazil. Before exam week we would take it, and it's great. I love it."

As Brownlow explains further over email: "We don't actually eat the berry. Supplements in the form of powder, shots, and even sodas are common and easy to find in Brazil." Just look for the botanical genus and species Paullinia cupana on the label, along with the plant part (i.e., seed extract).

We recommend you find a thoughtfully formulated capsule with guarana (like mbg's focus+, which Brownlow is a personal fan of!) since there will be no sugar and other additives, but Brownlow does also dabble in some guarana soda every once in a while for a taste of home. "Guarana soda is the only [soda] I'll drink once in a blue moon because it's nostalgic," she says.

Guarana is a multitalented nootropic. Along with being a natural source of caffeine, this unique Brazilian superfruit enhances cognitive function, including processes like memory, learning, and attention.* Guarana is also a major source of cell-protecting phytonutrient antioxidants like theobromine, tannins, saponin, and catechins. The combination of these compounds supports mental clarity, in addition to contributing to increased energy.*

Not to mention, a 2019 scientific review in the journal Global Psychiatry found that guarana improved reaction time and accuracy of task performance in young, healthy adults.* With all the nootropic accolades on this plant's CV, it's no wonder Brownlow passed so many exams (after all, that Ph.D. degree took a minute!).

You might even want to combine guarana with Panax ginseng, if you can—in a 2004 Pharmacology Biochemistry and Behavior clinical study, guarana was shown to work synergistically1 with ginseng to promote cognitive performance.*