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A 2024 mouse study measured 3.5% oral bioavailability
These associations are most useful when corroborating findings are present, so the rest of the workup, not the B12 alone, determines how far to go
This often occurs in smokers, people with metabolic disease, heavy alcohol drinkers, as a side effect of certain prescription drugs, rheumatoid arthritis and impaired thyroid function
For ongoing decision-making, re-scan every 812 weeks to spot real trendsnot day-to-day noiseand make smart adjustments using our guidance on how often to get a DEXA scan
This can manifest as brain fog, difficulty concentrating, and difficulty completing tasks