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are b12 sprays effective as injections Oral Spray vs Injections: Which is Right for You? Buy Healthaid Vitamin B12 1000μg
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It has an advantage of depressing/ calming down your nervous system

Judson, G., Babidge, P., Chen, Z., & Sansom, L

It's important to note that while NR is generally recognized as a dietary supplement in the US, the FDA has indicated that NMN is excluded from the dietary supplement definition

If you fall into any of these risk categories, discuss B12 testing with your GP or midwife early in pregnancy
