Safety of two-year caloric restriction in non-obese healthy individuals - PubMed (original) (raw)

Randomized Controlled Trial

Safety of two-year caloric restriction in non-obese healthy individuals

Sergei V Romashkan et al. Oncotarget. 2016.

Abstract

Background: The extent to which sustained caloric restriction (CR) in healthy non-obese adults is safe has not been previously investigated.

Objective: Assess the safety and tolerability of sustained two-year CR intervention in healthy, non-obese adults.

Design: A multi-center, randomized controlled trial. Participants were randomized using a 2:1 allocation in favor of 25% CR vs. Ad-Libitum intake (AL). Adverse and serious adverse events (AE, SAE), safety laboratory tests, and other safety parameters were closely monitored.

Results: Three participants were withdrawn from the CR intervention because of the safety concerns. No deaths and one SAE was reported by participants in the CR group. Although the difference in AE between AL and CR groups was not significant, within the CR group, the incidence of nervous system (p = 0.02), musculoskeletal (p = 0.02) and reproductive system (p = 0.002) disorders was significantly higher in the normal-weight than in the overweight participants. At months 12 and 24, bone mineral densities at the lumbar spine, total hip, and femoral neck of participants in the CR group were significantly lower than in those in the AL group.

Conclusions: Two-years of CR at levels achieved in CALERIE was safe and well tolerated. Close monitoring for excessive bone loss and anemia is important.

Keywords: Gerotarget; calorie restriction; dietary energy restriction; humans; safety.

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Conflict of interest statement

CONFLICTS OF INTEREST

None reported.

Figures

Figure 1

Figure 1. Individual adverse events in CR participants in years 1 and 2 of CALERIE

Includes only AEs that occurred more often in the CR arm and were reported by at least 5% of CR participants.

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