During this phase, some users notice subtle energy improvements, particularly during fasted states
The mechanisms differ significantly
A 2017 meta-analysis of data from 15 trials, including more than 71,000 participants at risk of or with existing CVD, showed that B-vitamin supplementation had no significant effect on risk of myocardial infarction (heart attack) or all-cause mortality but reduced risk of stroke by 10% (RR, 0.90
In a 2001 study published in Endocrinology , Heffernan and colleagues reported that chronic AOD-9604 administration reduced body weight gain, decreased adipose tissue mass, and increased fat oxidation in obese mice without altering IGF-1 levels or glucose metabolism effects that were abolished in beta3 adrenergic receptor (3-AR) knockout mice, implicating 3-AR signaling as the mechanism of action [1]
B12 is essential for red blood cell production and energy metabolism at the cellular level