The reason is that injections are more easily absorbed by the body, particularly if you have underlying conditions that may lead to an inability to efficiently absorb the vitamin, such as Irritable Bowel Syndrome or Celiac Disease
Titration Criteria: Evaluate patient progress every 4 weeks: No/minimal side effects: Increase dose to 100 mg (1 mL) once weekly
doi:10.4292/wjgpt.v7.i3.387 42Warner B, Johnston E, Arenas-Hernandez M, et al
A 2019 randomized controlled trial of lipotropic injections (methionine, inositol, choline, B12) versus saline placebo in 120 participants on ad libitum diets found 0.8 kg (1.76 pounds) difference at 12 weeks, not statistically significant (p=0.18) (Karbalay-Doust et al., Journal of Research in Medical Sciences , 2019)
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