A compound that is clean enough for a binding assay is not automatically clean enough for a quantitative cell-based readout where a co-eluting impurity could carry activity of its own
The 28-day expiration after opening applies to any size of multi-dose vial
All of these share a commonality in that hormonal balances within the body shift through pregnancy, weight fluctuations (metabolic changes), and pregnancy - and really its the hormonal impact on collagen production that causes the skin to bounce back, or not
Common sites: lower abdomen (2 inches from the navel), upper thigh, or proximal to the target injury
What that looks like in practice: some people notice shifts in energy and how their body composition responds before the scale moves much, since the goal is metabolic, not just water weight
Users must comply with institutional laboratory safety protocols and local regulations