European investigation with twenty people shown major dermal good quality improvement and atrophic acne scar reduction from PN injections, confirming its security and success as one procedure. Even so, this requires larger sized, for a longer time-phrase randomized scientific studies for more conclusive evidence. 已知對膠原蛋白過敏患，包括（但不限於）曾使用膠原蛋白製品，如注射劑、植入... https://laetigen73719.targetblogs.com/35482784/the-fact-about-laetigen-that-no-one-is-suggesting