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This method bypasses the digestive system, which means more of the peptide reaches the bloodstream and target tissues

Even with a research history dating back to the 1970s, DSIP has somewhat fallen out of the scientific literature in the past 20-30 years, and much about its health applications is subject to debate

If any link in that chain breaks, the window shrinks

However, the evidence is limited and mixed, so patients should avoid assuming it will reliably improve deep sleep

Instead, these products are sold as over-the-counter supplements and typically contain ingredients such as berberine, a plant-derived compound sometimes studied for metabolic effects

"We don't know" cuts both ways here