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2018 [cited 2022 Sep 10]

It is thought that when lambs are injected with Vitamin B12, there can be an up to 25% increase in live weight gain for a short period (up to 10 days) due to the positive effect on the metabolism

Some formulations contain additional substances such as L-carnitine or amino acids, which may interact with medications or underlying health conditions

For observational studies (cohort and case-control), the NewcastleOttawa Scale (NOS) ( Risk of bias was interpreted as follows: i) Low risk: All criteria met or no more than one rated as unclear

So one ingredient supplies NAD+, and another is thought to stop the body from wasting it