What This Means
This research suggests that taking a fruit, vegetable, and berry (FVB) juice powder concentrate supplement — six capsules per day — for six months is safe for generally healthy older adults. The study tracked multiple health markers related to liver, kidney, thyroid, fat, and sugar metabolism, and found no harmful changes in the group taking the supplement. This addresses a practical concern for people who use such supplements long-term, as safety over extended periods is not always well-studied.
Beyond safety, the study also found several potential cardiovascular and antioxidant benefits in the FVB group. Specifically, levels of carbonyl proteins (a marker of cell damage from oxidative stress) went down, homocysteine (a blood marker linked to heart disease risk) stayed stable rather than rising as it did in the control group, and both systolic and diastolic blood pressure decreased. However, when the researchers adjusted their statistical analysis to account for differences in participants' starting values, age, and body mass index, some of these effects became less statistically robust — only the homocysteine and diastolic blood pressure differences clearly held up.
This research suggests that FVB concentrate supplementation may support cardiovascular health and reduce oxidative stress in older adults without causing metabolic harm, but the authors are careful to note that with only 34 participants and results from just the halfway point of a one-year trial, these findings should be considered preliminary and hypothesis-generating rather than definitive. The full one-year results will be needed to draw firmer conclusions.