l theanine l carnitine L-Theanine, Double Strength 200 mg Veg Capsules Botanic Choice L-Carnitine
Description
Once your B12 levels have stabilised, continuing injections every few weeks or months can help maintain their positive effects, ensuring energy levels and overall health remain consistent

Nature 362, 5962

If you have historically been sensitive to hormonal fluctuations, you may be more likely to experience these effects

Association of vitamin B2 intake with cognitive performance in older adults: a cross-sectional study

Adv Pharm Bulletin

Cell 134 , 743756 (2008)
