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doi: 10.1002/j.1460-2075.1992.tb05238.x

Improve Wellbeing Man with open arms- Picture Courtesy: iStock Vitamin b1, b6, and b12 are nutrients which play vital role in promoting bodily growth and functions

Gurram PC, Manandhar S, Satarker S et al (2025) Substance P mitigates lipopolysaccharide induced cognitive impairment in rats in a dose dependent manner

This guide covers the compounds the literature actually studies, then shows where to source them with documentation you can verify

But given that these side effects are very rare, taking vitamin B12 at bedtime should be fine unless sleep disruption becomes a persistent symptom after taking supplements

If you are consuming collagen peptides, be aware that some types of collagen are made from common food allergens, like shellfish and eggs