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10.1016/j.bbrc.2006.02.116 294 XiaoJ.LvY.LinB.TipoeG
In fact, not all of them meet the true definition of nootropic
Naito Y, Takagi T, Higashimura Y
Here are some of the signs of B12 deficiency to look out for: Numbness, tingling, or a pins and needles feeling in the hands or feet (even if slight or minor) Falling or losing your footing more than usual or without reason Not being able to stay balanced Stiff muscles Vision changes Symptoms of psychosis (e.g., hallucinations, paranoia, disorganized thoughts, or schizophrenia-like symptoms) Severe or unusual tiredness Memory issues Sometimes, these symptoms can develop gradually
Zinc reduces the duration and severity of acute episodes and lowers recurrence risk in the months following supplementation (Bhutta et al., 1999