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. 2023 Oct 3:10:1208734.
doi: 10.3389/fnut.2023.1208734. eCollection 2023.

The effects of NAD+ precursor (nicotinic acid and nicotinamide) supplementation on weight loss and related hormones: a systematic review and meta-regression analysis of randomized controlled trials

You Baichuan  1 , Marcela Gomes Reis  2   3 , Sogand Tavakoli  4 , Navideh Khodadadi  4 , Mohammad Hassan Sohouli  4 , Nathalia Sernizon Guimarães  3   5
Affiliations

The effects of NAD+ precursor (nicotinic acid and nicotinamide) supplementation on weight loss and related hormones: a systematic review and meta-regression analysis of randomized controlled trials

You Baichuan et al. Front Nutr. .

Abstract

Background: Despite the fact that obesity and overweight are serious major health problems worldwide, fighting against them is also considered a challenging issue. Several interventional studies have evaluated the potential weight-reduction effect of nicotinamide adenine dinucleotide (NAD+) precursor. In order to obtain a better viewpoint from them, this study aimed to comprehensively investigate the effects of NAD+ precursor supplementation on weight loss, adiponectin, and leptin.

Methods: Scopus, PubMed/Medline, Web of Science, Cochrane, and Embase databases were searched using standard keywords to identify all controlled trials investigating the weight loss and related hormones effects of NAD+ precursor. Pooled weighted mean difference and 95% confidence intervals were achieved by random-effects model analysis for the best estimation of outcomes.

Results: Twenty two treatment arms with 5,144 participants' were included in this systematic review and meta-regression analysis. The pooled findings showed that NAD+ precursor supplementation has an effect on lowering BMI (weighted mean difference (WMD): -0.19 kg/m2, 95% confidence interval (CI): -0.29 to -0.09, p < 0.001) and increasing adiponectin (WMD: 1.59 μg/mL, 95% CI: 0.49 to 2.68, p = 0.004) in humans compared with control groups. However, no significant effect was observed on body weight and leptin. There was a significant relationship between doses of intervention with changes in BMI. In addition, subgroup analysis showed that BMI reduction was greater when receiving nicotinic acid (NA) supplementation than nicotinamide (NE) supplementation.

Conclusion: NAD+ precursor had significant effects on weight management with the reduction of BMI and increasing adiponectin.

Keywords: NAD+ precursor; niacin; obesity; obesity hormone; weight loss.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Flow chart of the study, including identification, screening, eligibility, and the final sample included.
Figure 2
Figure 2
Forest plot of randomized controlled trails investigating the effects of NAD+ precursor supplementation on weight (kg).
Figure 3
Figure 3
Forest plot of randomized controlled trails investigating the effects of NAD+ precursor supplementation on body mass index (BMI) (kg/m2).
Figure 4
Figure 4
Forest plot of randomized controlled trails investigating the effects of NAD+ precursor supplementation on (A) leptin (ng/ml) and (B) adiponectin (μg/mL).
See this image and copyright information in PMC

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