Thigh Trimming Diets

Hey ladies! So, I have heard that the main way to slim down your thighs is mainly by dieting and not by exercising? I've been fairly active my whole life, and I'm not overweight. (I'm 5'3" weighing 105lb). But the biggest part of my body are my thighs (and I have no booty whatsoever...none.) I've never dieted before and don't know how to safely. I don't have enough money to go see a nutritionsit or Dr. so how do I go about this...? I just feel extremely disproportionate. Any help is greatly appreciated. Thank y'all so much. 💕