There is a lot, and I really mean a lot of scientific literature on conjugated linoleic acid, especially when you compare it to other popular ingredients used for the purpose of weight loss, used in various dietary weight loss supplements. You need a lot in order to make sure that the ingredient works, you need more than one study to make sure that it is reliable, to see if it does the same thing again.

Conjugated linoleic acid is the name of a group of isomers of linoleic acid basically, and the best natural sources of CLA are beef as well as lamb meat and dairy products, in particular, milk and cheese. It is very important that the products come from grass fed cattle, cow and lamb. The grass contributes to increasing levels of CLA in the food due to the fact that it contains omega 3 fatty acids. The milk of a cow that has not been fed grass will have much less CLA than the milk of one that has been grass fed.

CLA did the best in animals, it has the best results in animals, not so much for humans and a lot of its popularity is due to animal trials. In some animals it managed to reduce tumors by 50%, that is half and that is amazing. It has a lot of potential but at the same time, a lot of problems when you apply it to humans.

In humans, you need a much larger dose for starters, at least if not more than 3 grams each day for several weeks or months to burn fat. It has studies where it promotes fat loss and preserved muscle. Then again, it has studies where it showed no significant difference in fat mass or body composition or in muscle mass. It's unreliable is what that means and that is why, despite having a lot of popularity, it is hard for anyone to recommend it to you because it's hard if not impossible to predict if it will work for you or not. There are things out there that are much more reliable and thus, worth investing in more, however, if money is not a problem for you and you are willing to give it a try, CLA can prove useful to you. As a conclusion, it is not that CLA does not work, it's that it offers conflicting and unreliable results and it works differently for each person.

Source:
https://diets-usa.com/cla-safflower-oil-reviews