glutathione methionine synthesis Metabolism and tissue promote Methionine metabolism to glutathione [48,49].

Vitamin B12 overdose Symptoms: Headache Nausea and vomiting Bloating Diarrhea Fatigue and weakness Tingling in hands and feet Dizziness Itchy, burning skin Acne High blood pressure There are few studies for vitamin B12 overdose, but some medical experts suggest potential harm from B12 overload: May increase the risk for heart attack and stroke Too much vitamin B12 and folate during pregnancy may increase the risk of autism in offspring Could increase the risk for cancer May shorten lifespan High C-reactive protein (CRP) combined with vitamin B12 overload decreases the survival of cancer patients Its unlikely that high vitamin B12 can occur without the overuse of high-efficiency oral or injectable B12

Deery E

Peptide Storage Guidelines Light-protected Low moisture Stable temperature Sterile handling

Vitamin B12 plus iron for roosters and chicks

So, it might enable athletes to recover faster from hard training sessions, which would enhance their performance in the long run