Some more severe, but rare, side effects that can occur are low potassium levels, muscle cramps, irregular heartbeat, chest pains, or blurred vision
The water itself doesn't "go bad" in a dramatic way, but you can no longer rely on the manufacturer-validated preservative activity
These are fundamentally different products in terms of appearance, packaging, and what you should expect to see
An undated opened vial is an unusable vial, because you cannot establish where it sits in the window
Sheep, Pig:6 ~ 8ml
Additionally, B12 is involved in energy metabolism, aiding in the conversion of food into energy, and has implications for mood regulation through its role in neurotransmitter synthesis