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Description
17 Sublingual B12 bypasses intestinal absorption issues, which makes it a more accessible treatment option for vitamin B12 deficiency

The body can absorb between 55% and 97% of B12 from injections, compared to only about 1.3% from a high-dose oral supplement
Bariatric Surgery and Vitamin B Deficiency 4.1
TB-500 has a 2-day half-life and requires 4-6 weeks of consistent dosing at 2-5 mg per week to reach tissue saturation