5. **No Upper Limit**: There's no "too much" in terms of a …
5. **No Upper Limit**: There's no "too much" in terms of a 'toxic' level for vitamin B12 in clinical settings because it is usually filtered out by the kidneys.
5. **No Upper Limit**: There's no "too much" in terms of a 'toxic' level for vitamin B12 in clinical settings because it is usually filtered out by the kidneys.