The most common is acquired, which results from changes initiated by degeneration of the intervertebral disk during aging
At the same time, every claim about human efficacy tendon healing, gut repair, bone recovery remains extrapolated from rodent studies conducted predominantly by a single research group without independent replication
A bacteriostatic water vial can typically be used for up to 28 days after the first puncture, if stored properly
Key gaps to address: dose-response in humans, safety/tolerability profiles across populations, interaction effects in stacks, and long-term cardiometabolic outcomes
We have low human fertility data, though most of the evidence is preclinical
While some trials test brand-new treatments, others study ways to make current treatments work better, or focus on reducing over-treatment by shortening the course of care or replacing older therapies that have long-term risks