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There are a whole host of complications that we see. The FDA had warned that some med spas and IV clinics, including mobile IV infusion services, were mixing products inappropriately without proper sterilization

A mild vitamin B12 deficiency can go unnoticed

These include: pernicious anaemia where your immune system attacks healthy cells in your stomach, preventing your body absorbing vitamin B12 from the food you eat

The study was conducted among men with fertility problems and showed that those with good vitamin B12 status had a significantly better "androgen profile." This means that their bodies were better able to produce testosterone