The reason I ask is that every RIP blend with short esters I've ever used have had either a little or a lot of PIP, but I've recently purchased a new brand, Sigma X Rip 281 which supposedly contains Test P 70mg, Tren A 70mg, Mast p 70mg, NPP 70mg, Mtren 1000mcg and I have little to no PIP. It does not specify what they are constituted with, whether they use EO etc, but due to the lack of PIP with such a concentrated blend, I'm quite sceptical of its contents.