When oxygen is missing, or when pyruvate is temporarily developed faster than it could be eaten from the citric acid cycle (as in intensive muscular exertion), pyruvate is transformed to lactate from the enzyme lactate dehydrogenase, a system that also oxidizes NADH back to NAD+ for re-use in even further https://holdenhowcj.blogozz.com/28424176/5-easy-facts-about-renew-immune-support-described