Living 5 minutes away from this place has been a blessing.
Juice: Not only do they have amazing green (and red, and seasonal -yum!) juices, but all their produce is organic and gluten free -AND they offer superfoods (from sol semilla). Also, the prices will not get any lower than this anywhere else in Paris for such good produce quality- specially being so central in the city. Try their protein drink - you won't be able to make this at home for such great price.
Salads: A different kind of salad everyday for 6.50€. If you want one of their daily salads get there early -you won't find any after 1.30-2pm as they run out really quickly. They are only made every morning with lots of greens and vegan protein sources (quinoa, hummus, beans, lentils).
Cons: Get there early (before 2pm) for salad