Same as the title.
Dirty fast for weight loss, no. Clean fast for autophagy - hotly debated.
From MyPlate:
lemon juiceServing Size: 1 wedge yieldsservings 1.0total calorie 10 estimated calories from fat• Fats: 0 g / 5%• Carbs: 0 g / 91%• Protein: 0 g / 4%