For these individuals, vitamin B12 injections are often the most effective way to restore healthy B12 levels because they bypass the digestive system entirely, delivering the vitamin directly into the bloodstream for maximum absorption (around 95% compared to 25-50% for oral supplements)
Why people expect B12 injections to affect weight There are three understandable reasons B12 injections are associated with weight changes
That preservative is the entire reason BAC water exists it inhibits the growth of bacteria, which means a single vial can be punctured multiple times over weeks without becoming a contamination risk
Vitamin B12 deficiency can present in a variety of ways, and symptoms often develop gradually, making them easy to overlook or attribute to other causes
Many patients report less tiredness within two to four weeks of starting injections, depending on how depleted their levels were at baseline
This combination contributes to improved glucose control and weight loss