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Regular B12 injections help support balanced brain chemistry, which may lead to improved mood, better stress resilience, and a more stable sense of well-being

If I understand rightly you haven't an absorption problem.So once on supplements or a richer B12 diet you can store and utilise b12 from your liver

Yes, sufficient Vitamin B12 levels during pregnancy reduce risks of complications like neural tube defects and support fetal development.

Summary of the findings The current article evaluated 13 studies, of which eight were randomized clinical trials comparing different administration routes of vitamin B12 in patients with vitamin B12 deficiency