They signal the pancreas to release insulin, slow the rate at which food leaves the stomach, and communicate with the brain to create feelings of fullness
This is because a lack of vitamin B12 can cause anemia, which can lead to shortness of breath
Regarding FDA approval: because this is a compounded product, it is not directly FDA-approved
Vegetarian sources of B12 include chlorella, nori, nutritional yeast and certain mushrooms, but many vegans and vegetarians have insufficient levels of B12 because its not widely found in plants. According to Mullane, not getting enough B12 can result in issues like anaemia, fatigue and more intense symptoms including shortness of breath, palpitations, pale skin, muscle weakness, numbness and tingling in hands or feet, blurred vision and memory loss