Do you personally use gso or do you brew your own personal stash in EO?Definitely many factors. There's injection technique, virgin muscle, the raws, personal reaction to a particular compound, amount of solvents used, the amount of product per ml, carrier oil and so on. As the source making the products there are some things I can control but can't control everything. You're gonna get customers with pip, but you can take steps to reduce that percentage. As a source from the day you start brewing everything is a learning process. I use gso because I find it's tolerated by a greater percentage of people. Doesn't mean it's the best carrier oil. The best carrier oil is the one that meets your needs the most. My favorite product that I've used throughout the years was ethyl oleate. It was so smooth and thin I could use a slin pin and inject in my shoulders. Felt nothing. That being said it probably has the most negative reactions by a higher percentage than any other carrier I've used. Some sources don't tell you but add a little in their blend to thin out their products.
EO is great. I had some tren a 200mg/ml in EO last year and it was completely painless. And nice and thin like you said