Aim:
This review of studies attempts to determine:
Methods:
The paper considered the results of 6 clinical trials examining the effect of different encapsulated juice powder concentrates, a fruit and vegetable juice powder concentrate (FV; Juice Plus+®); a fruit, vegetable and berry juice powder concentrate (FVB; Juice Plus+®) on exercise and performance sport. The trials enrolled a total of 138 participants, both males and females, aged 18-40, most of whom were trained athletes. One study was on adults new to resistance training. Five out of 6 studies were randomized, double-blind, and placebo-controlled, while the other was a pilot study. Supplementation periods lasted from 2 to 28 weeks.
Results:
The studies consistently found that the encapsulated juice powder concentrates reduced oxidative stress in exercising individuals. There was also some evidence for strengthened immunity and reduced inflammation. Only 1 study investigated a direct functional outcome of FVB on improved athletic performance and found no differences between supplementation and placebo in untrained adults. The author recommends that nutritionists consider whether athletes should supplement with juice powder concentrates on a case-by-case basis (taking into consideration habitual diet, training, and individual biochemistry) but indicates they could be helpful to address oxidative stress, inflammation, and overall health.
Conclusion:
The main base for each athlete’s health, immunity and performance is a mixed balanced diet. Supplementation with mixed FVB concentrates is indicated if health stabilization and avoidance of oxidative stress and inflammation have priority.
PubMed link: