bpc-157 injection timing best time of day on an Empty Stomach: & Safety Oral vs Injectable BPC-157: Differences,

However, older adults, vegetarians, vegans and people who have conditions that affect their ability to absorb vitamin B-12 from foods might benefit from the use of oral supplements

While limited evidence supports this, the practice is common

Coverage is more likely if you have an underlying health condition that prevents your body from properly absorbing Vitamin B12 from food or supplements, such as pernicious anemia or certain gastrointestinal disorders, or if you have had specific surgeries like gastric bypass

But it seems most common to see B12 half-life in plasma reported as 6 days, for example in the cyanocobalamin pharmaceutical insert : s3-us-west-2.amazonaws.com/

Beyond 48 hours, potency loss becomes measurable