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doi: 10.1080/07435800.2017.1381972
While RCTs remain the gold standard for intervention assessment, observational studies provide complementary evidence, especially when using objective biomarkers such as serum Vitamin B12, MMA, and homocysteine
For individuals whose cognitive problems stem primarily from stress and anxiety, Selank often proves more effective than Semax
[13] Competing substrates that block PepT1 completely eliminate KPVs effects
