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Lee HC, Thng TG, Goh CL

10.1073/pnas.0607260103 20 CoffmanC.HarrisW.KintnerC

Look for these specific features: Third-party testing seals like USP or NSF certification GMP (Good Manufacturing Practices) certification Prominent brands that are open about their testing protocols Clear labeling of active ingredients and dosages It also helps to test your NAD+ levels before and after taking supplements

Vitamin D Vitamin D is another supplement that can cause heart palpitations when taken in high amounts

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