cigarette smokers life expectancy Preventing Chronic Disease | Estimating Benefits of Past, Current, and Future Reductions in Smoking Rates Using a Comprehensive Model With Competing Causes of Death 21st-Century Hazards of Smoking and
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Plus, older adults are more likely to have pernicious anemia or atrophic gastritis, which also affect B12 levels

In the Diabetes Prevention Program Outcomes Study, low B12 occurred more often in the metformin group than placebo at 5 years (4.3% vs 2.3%), and combined low plus borderline-low B12 was far more common in metformin users at both 5 years (19.1% vs 9.5%) and 13 years (20.3% vs 15.6%)

This is why vapes should always be kept out of reach of young children as they can cause serious poisonings
Omnis nostrum natus quae
