For a broader overview, see the AJMC article on oral peptides
There are several potential side effects you can experience from hormone injections, even though they are usually safe
Understanding the differences between these delivery methods can help you make an informed decision
Activation of 3-AR via Gs cAMP PKA phosphorylation of hormone-sensitive lipase (HSL) leads to: Splitting of triglycerides into free fatty acids + glycerol Release of fatty acids from adipose tissue into the blood Increased oxidation of fatty acids in mitochondria (muscle, liver) Heffernan et al
Since Vitamin B12 is mostly taken in with animal products such as meats, shellfish, dairy and eggs, people who abstain from animal based proteins are more commonly afflicted
Some symptoms may not show up for a few years until the deficiency worsens and affects other parts of your body