Coffee science
Robusta vs Arabica
Last reviewed 7 Nov 2026
Performance+ is a Robusta and Lifestyle an Arabica: two different coffee species. This page sums up how their caffeine compares.
Caffeine in the bean
A 2021 review found that unroasted Robusta beans contain 1.6–2.4% caffeine by dry weight, against 0.9–1.2% for Arabica.
Sources: Foods, 2021 (opens in a new tab)
Caffeine in the cup
The same review notes that almost all studies of brewed coffee find about 1.4 to 1.8 times more caffeine in Robusta.
Sources: Foods, 2021 (opens in a new tab)
Why Performance+ needs fewer beans
By our estimates, Performance+ has about 23.9 mg of caffeine per gram and Lifestyle about 12 mg. So an everyday cup of Performance+ needs only about half the usual beans.
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Research changes. These summaries reflect the studies available on the date shown, and we update them as new evidence appears. They are general information, not medical advice.