traditional Korean herbal preparation of Cinnamomi Cortex Spissus (Cinnamomum cassia Blume), Citri Pericarpium (Citrus unshiu Markovich), Amomi Rotundus Fructus (Amomum kravanh Pierre ex Cagnep), Syzygii Flos (Syzygium aromaticum Merr et Perry), Amomi Fructus (Amomum xanthioides Wall), yeast, malt, and honey consumed as a beverage; enhances hippocampal synaptic plasticity and memory in mice