its page is the better starting point for the underlying copper-peptide chemistry
The theory is that this keeps your body sensitive to the peptide and helps you lock in your progress, though this hasn't been proven
Bioavailability: 1 to 2% absorbed passively without intrinsic factor Deficiency: only if GI absorption is intact Dosing: daily, high-dose oral Prescription: no, available OTC At home: yes Get a B12 injection prescription Not sure which format fits your situation
primary care-based study. Med Glas (Zenica) 10.2 (2013): 203-210
Dietary sources of vitamin B12 include: Excellent sources (per typical serving): Liver (lamb or beef): 5080 g per 100g Clams and mussels : 2080 g per 100g Mackerel and sardines : 812 g per 100g Salmon and trout : 35 g per 100g Good sources: Beef, lamb, and pork : 13 g per 100g Eggs : 12 g per egg (concentrated in the yolk) Milk and yoghurt : 0.41.2 g per 200ml serving Cheese : 0.52 g per 40g serving Fortified foods provide important sources for those avoiding animal products: Fortified plant-based milk alternatives (soya, almond, oat) Fortified breakfast cereals Fortified nutritional yeast Some fortified meat alternatives Always check product labels, as fortification levels vary considerably between brands