Juice Plus+ Research in Athletes
Juice Plus+ has been tested on elite athletes in several different environments. Two articles were published as
the result of in-depth analysis of the data collected while studying 41 highly
trained men (Austrian special forces, aka the Cobras) consuming Juice Plus+ for
Effects of a Fruit/Berry/Vegetable Supplement on Muscle Function and Oxidative Stress
Purpose: This study tested the effectiveness of a fruit/berry/vegetable concentrate (FVC), Juice
Plus+ supplement on muscle function and oxidative stress in response to an acute bout of eccentric exercise (EE).
Methods: Forty one (18-35 yrs) healthy volunteers were randomly assigned to either a placebo (P) or
FVC treatment taking capsules for 28 days (6 day-1) prior to the EE and for the next four days. All subjects completed 4
sets of 12 repetitions of eccentric elbow flexion with their non-dominant arm. Blood, muscle soreness (MS), range of
motion (ROM), and maximal isometric force (MIF) of the elbow flexors were obtained before and, immediately after
exercise, and at 2, 6, 24, 48, 72 hrs post-exercise. Plasma was analyzed for creatine kinase (CK), lipid hydroperoxides
(LOOH), malondialdehyde (MDA) and protein carbonyls (PC). Glutathione ratio was determined from whole blood extracts.
Results: MS, ROM, MIF and plasma CK demonstrated significant time effects independent of treatment.
MS and plasma CK increased over time while ROM and MIF decreased over time. There was a significant time and time by
treatment effect for plasma PC and MDA. PC and MDA increased over time in the P group (p<0.01) but were not
significantly altered in the FVC treated group at any time. No significant changes were noted in LOOH. The glutathione
ratio was elevated immediately post exercise in both groups (p<0.01) and elevated 6hr post exercise with P compared to
the FVC treated group (p<0.05).
Conclusion: This study reports that 4 weeks of pretreatment with a FVC (Juice Plus+) can attenuate blood
oxidative stress markers induced by EE but had no significant impact on the functional changes related to pain and
Below are graphs representing the results of this analysis, published in Medicine & Sports Science
in Sports & Exercise (the journal of the American College of Sports Medicine); the bars represent the levels of
CP (carbonyl proteins - marker of oxidative stress) for Plac (Placebo) and JPC (Juice Plus+
Concentrate) groups at 70% and 80% VO2max, in four groupings: BE (Before Exercise), IE (Immediately after Exercise), 30M (30 minutes after exercise), and
30H (30 hours after exercise):
At the end of the 28 week period, with their workout intensity ramped up
to the maximum, and with the accumulative effect of oxidative stress kicking in, compared to the placebo group whose
oxidative stress (carbonyl proteins) was measured at 0.9 after exercise and still raised to 0.5 30 hours later, the Juice Plus+ group saw NO
change in their levels, which remained at the same 0.3 level as baseline (at the start of the 28 week period).
The training effect of exercise
(aka 'adaptation') is vital for the athlete
to gain in strength and endurance - for example, muscle tissue must break down and be repaired to grow stronger.
However, excessive damage caused by exercise-induced oxidative stress is to be
avoided whenever possible. This study again demonstrates what all Juice Plus+ athletes know from their own experience: that
when taking Juice Plus+ we experience less oxidative damage, while fully benefiting from our training. For more on Juice Plus+ Athletes in Europe visit
All the studies on Juice Plus+ in serious athletes have demonstrated
Medicine & Science in Sports & Exercise 2006 (full
article) - Study findings: Juice
Plus+ supplementation for 2 weeks attenuated the rise in protein carbonlys after 30 minutes of aerobic exercise, even after
a 1 week washout.
Journal of Nutrition 2007 (full article) - Study findings: Several indicators of oxidative stress, immunity, and
illness improved in 41 highly trained men (special forces) consuming Juice Plus+ for 28 weeks.
Medicine & Science in Sports & Exercise 2009 (full
article) - Study findings: Exercising at 80% VO2max intensity,
the Juice Plus+ group (compared to placebo) had lower baseline protein carbonyl levels after 16 and 28 weeks and no
exercise-induced protein carbonyl increase. Human mercaptalbumin, another marker of exercise-induced oxidative stress,
was also significantly lowered.
Medicine & Science in Sports & Exercise 2010
- Study findings: This study reports that 4 weeks of pretreatment with a FVC (Juice Plus+) can attenuate blood
oxidative stress markers induced by an acute bout of eccentric exercise, but had no significant impact on the functional changes related to pain and
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