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Several neurocognitive peptides have shown memory and cognition effects in animal models and small human studies, primarily through pathways involving BDNF (brain-derived neurotrophic factor), nerve growth factor, and synaptic plasticity

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doi:10.1016/s1590-8658(03)00067-7

Later, one RCT using 0.5 mg melatonin at 1 h before a desired bedtime significantly shortened sleep onset latency [20]

In lab experiments, they found that both drugs did their job, but KBP-336 was more powerful and leaned more towards activating one of the sensors over the other