It was originally isolated in 1977 from the cerebral venous blood of rabbits and has since been found to be present in small amounts in human brains and plasma, with higher concentrations later in the day.3 4 It, or a similar substance, is also present at higher concentrations in human breast milk.5 Because DSIP can cross the blood-brain barrier and is easily absorbed via the gut (unusual for a peptide), some researchers have hypothesized that it may facilitate post-feeding sleep tendencies among newborns, though it remains unclear whether DSIP truly has a hand in neonate sleep-wake cycles.4 5 6 Its mechanism of action is likewise unclear, but it may have something to do with endocrine regulation
What to expect Week 12 What you may notice: Subtle energy improvements and reduced afternoon crashes
I feel like Ive got my life back. Oliver Hughes, 41, Chicago, IL Dangers of joint disease: Orthopedic and joint problems can develop from many factors including aging, overuse, injuries, poor posture, and chronic conditions such as arthritis, diabetes, or autoimmune diseases
Difficulty sleeping: The pain and discomfort when lying on the affected side can make sleeping difficult
Missed doses interrupt the steady buildup that pills depend on, and some high-dose tablets are large and hard to swallow
