Esters refer to different types of compounds and chemicals that manufacturers use subtly change their products. Using esters in a synthetic steroid can help the steroid better bond to receptors. This helps the steroid remain in the body and continue producing effects for more time. Though esters can take different forms depending on the product, the manufacturers of steroids often use some combination of oils or fats. When originally used in veterinary offices, Tren Acetate contained a high level of natural oils. Thoroughly mixing the steroid with the oil was the first step associated with using it. While the newer products still contain some fats, users will find that these oils don’t lead to weight gain and that they no longer need to mix the liquid.
I don't care what drugs people, to each their own, and I agree with allowing people the decision of what they want to do by weighing the pros and cons. With that said, you are comparing weed closely with cocaine. What the fuck? You have to be very misconceived about weed, even comparing it to alcohol, which a lot of people unfortunately do, is a pretty huge leap.
Just to clarify, the only harm weed will do to your body is if you combust it, it can cause smoker's cough and phlegm. It has never been proven to cause even cancer in your lungs. If eaten or vaped, marijuana has no proven harmful side effects (unless you consider increased appetite harmful). Studies show weed consumed daily over decades can even decrease the risk of cancer.
Sorry, just wanted to clarify that since you were trying to compare weed to cocaine, alcohol, and steroids.