Figures
Figure 1.
Identification of included studies.
Figure 2.
Assessment of risk of bias in included studies. −(red)=high risk of bias, +(green)=low risk of bias, and ? (yellow)=unclear risk of bias.
Tables

Table 2.
Assessment of Clinical Relevance
Table 1.
Characteristics of Included Studiesa
↵a mRNA=messenger ribonucleic acid, PCR=polymerase chain reaction, NAD+=oxidized form of nicotinamide adenine dinucleotide, NADH=reduced form of nicotinamide adenine dinucleotide.
b Interventions for active and comparison groups were identical after 8 weeks. The results presented are from the 8-week time point. All results at the 20-week time point were not significant.
Supplementary Data
eAppendixes
Files in this Data Supplement:
- eAppendixes (PDF) (55 KB) -
This PDF contains the following supplements:
- eAppendix 1. PubMed Search Terms
- eAppendix 2. Reasons for Exclusion of Studies