"Interestingly, this study also demonstrated that E + C dramatically spared muscle catabolism, and that approximately 85% of the weight loss was due to loss in fat mass, compared with 50% of weight loss in placebo (10). Studies whose end-point was too early or those that looked only at total
weight loss often came up with negative results (19-21). Other groups have reported similar protein-sparing fat loss results as Astrup, using E + C 20 mg/200 mg (22). or using ECA in doses of 75-150 mg/150mg/330 mg (23)."
Yehya, Nadir. University of California, Los Angeles (2001). Mechanism, Efficacy, and Safety of an Ephedrine, Caffeine, and Aspirin Combination in the Treatment of Obesity. Nutrition Bytes, 7(1). Retrieved from: escholarship(dot)org/uc/item/6zh730fw
This has nothing to do with question OP is asking with regards to its "anti-catabolic properties". Yes, it has been well established that the EC stack enhances nervous system output, just like countless other stimulants.
The anti-catabolic properties associated with the EC stack pertain to the effect on nutrient partitioning. Muscle catabolism is the breakdown of muscle tissue to produce energy, and the EC stack has been proven in countless studies (like this one) to spare muscle tissue in a calorie deficit, thereby making it have anti-catabolic properties. In reality, any supplement that promotes fat burning and has a positive impact on lypolysis will also indirectly have a positive impact on muscle preseveration, making it anti-catabolic.
I didn't need to "make him look stupid", he accomplished that himself after he failed to answer OP's question, while at the same time wrongfully claiming that what I said was incorrect without any evidence to back it up. There was nothing left for me to do.
Do. You. Understand. Now?