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A peptide is a chain of amino acids held together by peptide bonds, and those bonds are precisely what digestive enzymes (pepsin, trypsin) are built to cut, with the acidic stomach environment finishing the job so an oral peptide is largely destroyed before it can be absorbed, which is why injection is the default

Longer sleep duration has been linked to an increased risk of dementia [61]

One study even suggested that long-term alpha-GPC consumption in mice kept aging-related cognitive decline to a minimum.52 However, more in-depth studies are needed on human subjects before this potential benefit can be considered legitimate or not

This is significant, but not as immediate as an IV