However, high-dose niacin (as a medication for cholesterol) is generally not recommended during breastfeeding, because significant amounts could enter milk and cause unwanted effects in the nursing infant (flushing, for example)
In controlled research settings, studies on Trinity-X have observed improvements in systolic and diastolic blood pressure readings, enhanced lipid profiles including LDL markers, and changes in visceral adiposity measurements in animal models
Injections might provide a quicker boost, while supplements offer a gradual, sustained effect
As Vitamin B12 is also water-soluble, any excess of the vitamin that your body doesnt need or have the capacity for will pass through and remove any risk of overdose
So, by one route or another, animals must get vitamin B 12 from bacteria (and archaea)