Red meat, particularly beef, is considered an excellent source of Vitamin B12 for several reasons (10, 11): Red meat, particularly beef, is considered an excellent source of Vitamin B12 for several reasons (10, 11): High concentration compared to many other food sources
Microdosing may provide benefits without the gastrointestinal distress associated with traditional dosing
There is no room for error
Life Extension has a lower concentration but theoretically superior bioavailability because of its addition of phytosomes
The common gastrointestinal side effects of GLP-1 receptor agonists - nausea, vomiting, diarrhea, constipation - are mediated by the drugs effects on the GI tract and brain, which should be the same regardless of whether the semaglutide or tirzepatide was produced by a commercial manufacturer or a compounding pharmacy