I think it's fine for a short-term clense. But the thing with raw diets is that you are missing out on some high quality nutrient-dense foods like potatoes, rice, beans and lentils. They provide you with heaps of iron, protein and calcium. Vegan diets are actually abundant with food choices, there is no need to cut down some of the healthiest vegetables. Even if it's for weight loss. If that's the case, you could just limit your fat, oil and salt intake, and you'll be fine.