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Scientifically Backed Sustained Energy*

NOW Sports® Sustained Energy uses Xtenergy

A natural caffeine ingredient derived from green coffee beans (Coffea robusta) using a unique extraction process and a patented delivery technology that allows for a sustained release profile over several hours.*

NOW Sports Sustained Energy Veg Caps
Clinical Studies Done to Support the Following Claims  Energy Production* Mental Alertness*  Sustained Release Caffeine*
Cut Mistakes by 50%*

Sustained Attention Task Study*

Randomized, double-blind, placebo-controlled; 27 medically healthy participants.

Results: Caffeine significantly improved performance cutting mistakes by 50%, reduced incorrect responses by 30%, and speeding up reaction time by 3%.*1

Xtenergy has a Better Effect on Mood and Alertness Compared to Regular Caffeine*

Study on How Long Caffeine Stays in the Blood and How Much is Absorbed Over Time

Randomized, double-blind, single-dose, active-controlled, crossover; 26 healthy males (aged 26 – 38). 

Results: Sustained-Release Caffeine (SRC) form Xtenergy formulations shows better effect on mood and alertness from 4 to 12 hours after taking it,* Reduces jitteriness for up to 8 hours and decreases tiredness later on.* Xtenergy is more effective for relaxation and overall mood after the initial 1-2 hours.* There is no safety issues or side effects reported for Xtenergy formulations and they stay in the body longer than immediate-release caffeine (IRC).*2

Caffeine Improved Attention and Reaction Times*

Effects of Caffeine on Attention in Healthy Adults Study

Randomized, placebo-controlled; 82 healthy adults both males and females (aged 40-60 years), who consume little or no caffeine.

Results: Caffeine improved attention and reaction times in both Mackworth Clock and RVIP tests.* More correct hits and faster reaction times with caffeine.* Better performance at 70 and 120 minutes post-caffeine.* Faster peak velocity and reaction time at 70 and 120 minutes post-caffeine.* Increased alertness and contentment at 70 and 120 minutes post-caffeine as well as reduced fatigue.*3

: Noticeable Improved Reaction Times 45 Minutes After Consumption of Caffeine*

Effects of Low Doses of Caffeine on Cognitive Performance and Mood 

Double-blind within-subjects design controlled with a placebo and five different caffeine doses; 23 adults both males and females with varying level of habitual caffeine intake (aged 18-56 years).

Results: Caffeine improved reaction times, noticeable 45 minutes after consumption, especially in high caffeine consumers.* All doses were equally effective to improve performance for high caffeine consumers, no effect on low caffeine consumers.* Increased energy was observed, especially with 100 mg caffeine.* Caffeine consumption prevented boredom.* There was no significant effect on tension, relaxation, headache, or overall mood.*4

References:

  1. Foxe JJ, Morie KP, Laud PJ, Rowson MJ, De Bruin EA, Kelly SP. Assessing the effects of caffeine and theanine on the maintenance of vigilance during a sustained attention task. Neuropharmacology. 2012;62(7):2320-7.
  2. Morde A ,Sudhakar K, Rambabu M, Shankar A, Rai D, Pawar K , Acharya M, Bakan M, Nalawade P, Nayakwadi R, Padigaru M. Pharmacokinetic profile of a novel sustained-release caffeine with extended benefits on alertness and mood: A randomized, double-blind, single-dose, active-controlled, crossover study. Current Research in Behavioral Sciences 2 (2021) 100036.
  3. Wilhelmus M. M, Hay J. L, Zuiker R. G, Okkerse P, Perdrieu C, Sauser J, Beaumont M, Schmitt J, Gerven J. M and Silber B. Y. Effects of a single, oral 60 mg caffeine dose on attention in healthy adult subjects. Journal of Psychopharmacology 2017, Vol. 31(2) 222–232.
  4. Smit H.J, Rogers P. J. Effects of low doses of caffeine on cognitive performance, mood and thirst in low and higher caffeine consumers. Psychopharmacology (2000) 152:167–173.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.