A panel reviewed the published research on caffeine and exercise for the International Society of Sports Nutrition. They assessed dose, timing, caffeine source, training status and differences between individuals. The panel reports gains in aerobic and anaerobic performance at 3 to 6 mg per kg of body mass taken about 60 minutes before exercise, plus benefits for attention and vigilance, with wide variation between people.
Caffeine is the most widely consumed psychoactive substance in the world. About 90% of adults in Western countries take it regularly, and a 2009 to 2010 survey put average intake among United States adults at roughly 200 mg per day. The International Society of Sports Nutrition wanted to state an official position on what the research supports: which types of exercise benefit, at what dose, at what timing, and in whom.
This is a position stand, not an experiment. A panel of 15 authors reviewed the published literature on caffeine and exercise, drawing on individual trials and existing meta-analyses. The paper was reviewed by the Society's Research Committee and published as its official position. It covers pharmacokinetics, aerobic and anaerobic performance, strength and power, cognition, sleep deprivation, heat and altitude, genetics, side effects, and alternative forms such as gum and energy drinks. No new data were collected and the search is not described as systematic.
The Society sets out 11 numbered positions. Caffeine acutely improves many aspects of performance in many but not all studies, with small to moderate benefits for muscular endurance, movement velocity, strength, sprinting, jumping and throwing. Aerobic endurance shows the most consistent moderate to large benefits, though the size varies between individuals. On dosing: 3 to 6 mg per kg of body mass improves performance consistently, the minimum effective dose is unclear and may be as low as 2 mg/kg, and high doses such as 9 mg/kg bring more side effects without added benefit. The most common timing is 60 minutes before exercise. For endurance in heat, 3 to 6 mg/kg is supported; at altitude, 4 to 6 mg/kg.
The effect sizes are mostly small. A meta-analysis of 46 endurance studies found mean power output improved 2.9 plus or minus 2.2% (effect size 0.22) and time trial completion improved 2.3 plus or minus 2.6% (effect size 0.28). Muscular endurance effect sizes ran 0.28 to 0.38 (6 to 7%), strength 0.16 to 0.20 (2 to 7%), jumping 0.17 to 0.22 (2 to 4%), and Wingate mean and peak power 0.18 (3%) and 0.27 (4%). One meta-analysis found no benefit for muscle power at an average 6.5 mg/kg dose (effect size 0.17, p = 0.36), and a repeated-sprint meta-analysis found no effect on total work, best sprint or last sprint.
The competing interests declaration matters. The lead author consults for and sits on the advisory board of a genetic testing company. Several authors sit on the scientific advisory board of a sports supplement manufacturer. One holds patents for an ingredient in a performance coffee product. One is the CEO of the ISSN, and the paper states the ISSN has received grants from supplement companies selling caffeine-based products. Five authors report no competing interests. No funding was received for the manuscript itself. This is a narrative position stand, so study selection is not reproducible. The paper notes the literature is inconsistent and that some studies show impairments in muscular endurance.
Read this as a professional body's summary written by authors with declared commercial ties to the supplement industry. The honest reading of its own numbers is that caffeine's effects are real but small in most exercise settings, largest and most consistent for aerobic endurance, and unreliable at the individual level. It does not show that caffeine works for everyone, and the paper says so. It shows no benefit for repeated sprints. It does not address long-term health outcomes, and it flags sleep disturbance and anxiety as dose-dependent side effects.
That depends on the specific medication and formula. A few, like blood thinners with CurQLife or blood pressure medication with MaxiNOs, are worth a direct conversation with your doctor first. Check each formula's own FAQ section for specifics, or ask your health coach.
No, and we'd rather be upfront about it. Bacopa, the plant in BacoZest, has published human studies, though they used other bacopa extracts. OptiNOs and MaxiNOs each have human studies sponsored by their maker, Laila Nutraceuticals, which haven't been published in a journal. CurQLife's research is still early, from lab and animal studies, and we label it that way.
It depends on what you're building your routine around. BacoZest is built around bacopa, which is studied for memory.* OptiNOs supports strength and muscular endurance alongside resistance training.* MaxiNOs was studied for healthy blood vessel function.* CurQLife's research is still at the lab stage. Your health coach can help you pick a starting point.
All four are built around plant extracts. OptiNOs was reported as well tolerated in its human study, and published bacopa studies reported no serious side effects. CurQLife's safety data so far comes from lab and animal testing. Check with your doctor first if you're pregnant, nursing, on medication, or managing a health condition.
Because the patented ingredients behind our four formulas went through dedicated research, and research costs real money. A generic curcumin or bacopa supplement hasn't been tested in the form you get from us. You're paying for an ingredient with research behind it, not just a label.
Generic ingredients often haven't been studied in the specific form you're buying. Our four core formulas use patented ingredients, and we show you the research behind each one, including where it's still early.
It depends on the formula. In its study, MaxiNOs blood vessel response was higher than placebo 2 to 3 hours after the first dose.* OptiNOs and bacopa were studied over 6 and 12 weeks of daily use, so give them time. CurQLife is meant to be taken daily.
Yes. BacoZest, OptiNOs, MaxiNOs, and CurQLife are built for different goals, and none of them contain stimulants. They haven't been studied together, so ask your health coach how to fit them into your routine.
