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A decline in the serum levels of B12 after one month of treatment with B12 nasal spray may indicate that the dose may need to be adjusted upward

Rates vary by payer, geography, and contract

We are currently in discussions with an active B12 test manufacturer

Sourcing from a domestic supplier eliminates these risks entirely: No risk of ABF seizure or package forfeiture

For best results, use consistently for at least three to six months, ideally alongside attention to nutrition (particularly protein and iron levels) and any underlying causes

The relationship between barrier function and clinical symptoms of diseases is often unclear and anecdotal, and this issue requires particularly thorough research