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Symptoms that may indicate low Vitamin B levels include fatigue, depression, low blood pressure, constipation, memory loss, weakness, sore tongue, tingling and numbness in fingers and toes, mood changes and difficulty walking
Combined with the metabolic benefits, it makes a compelling case for athletes who want to perform well now and maintain their health for decades
10.1093/nar/gks1104 Nucleic Acids Res
They found that this tetrapeptide (just four amino acids: Ala-Glu-Asp-Gly) could extend the lifespan of laboratory animals by 20-40% and restore function to aging tissues
doi:10.1073/pnas.2436556100 Smriga M, Ando T, Akutsu M, Furukawa Y, Miwa K, Morinaga Y
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