I've used up ampoules that are long out of date and have been subjected to fluctuating heat (terrible for wine!) due to being in my car, etc, and haven't noticed any difference
Side effects of 9M B12 Injection Common side effects of 9M B12 No common side effects seen How to use 9M B12 Injection How 9M B12 Injection works Quick tips 9M B12 PFS Injection helps replenish vitamin B12 level in your body
1 2 "Vitamin B12: A review of analytical methods for use in food"
A deficiency in this vital nutrient can lead to a range of health issues, such as fatigue, memory impairment, mood swings, and, in severe cases, neurological changes
But as mentioned, there's evidence to show that high oral doses of vitamin B12 can be just as effective at treating a deficiency