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And, from the NCAA's perspective, you have to protect your sports environment

Common B12 deficiency symptoms include: Persistent fatigue and weakness Tingling or numbness in hands and feet Memory problems and difficulty concentrating Mood changes like irritability or depression Dizziness and balance issues Pale skin or yellowing of eyes Sore, red tongue Who is Most at Risk for B12 Deficiency

FDA PCAC 2023 What this means practically for research dosage decisions: Doses above 1 mg/day are not supported by efficacy data and appear to produce diminishing returns

It may be beneficial for individuals dealing with concussions, traumatic brain injuries (TBI), and neurological disorders