I found this article in Time.com about whether there was a difference in weight loss/gain with a high-fat/low carb vs. low-fat/high carb. Pretty decent article, supports what I've said; the total calories count, not the source. Fat and carbohydrates are simply nature's carrier of energy from the sun to plants to us.
To lose body fat you need to create a calorie deficit (expend more calories than you take in). Build muscle to raise your metabolism. The most efficient way is with progressive, full-body strength training and interval conditioning. Contact me for more information.