Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Jun 30;151(10):2917–2931. doi: 10.1093/jn/nxab193

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2021. Published by Oxford University Press on behalf of the American Society for Nutrition.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

PMC Copyright notice

Whole-body indirect calorimetry of older adults with compromised physical function administered supplemental niacin equivalents and placebo. (A) Basal metabolic rate and (B) respiratory exchange ratio, with corresponding (C) carbohydrate oxidation rate and (D) lipid oxidation rate. (E) Submaximal exercise energy expenditure with corresponding (F) respiratory exchange ratio with corresponding (G) carbohydrate and (H) lipid oxidation rates. (I) Gross and (J) net exercise efficiency from submaximal cycling test. Data are represented as means ± SDs, n = 13. Abbreviations: CO, control; INT, NAD intervention.