They can cause a detox effect, but usually it is mild unless you are fasting from all else except greens.

I think that if someone has not taking a greens blend before it will detox them, especially if it has algae in.....Greens and Algae blends can help to chelate heavy metals and toxins, so it a strong detox agent. On the other hand it is a powerful superfood and if you have already been taking it for awhile then it is a great addition to you diet while preggers...it will give you and the baby extra nutirents.

There is a product called Green+ and I always here about Green+ babies being so happy and healthy..the mom had taken the product while pregnant. A few friends of mine have also taken suoerfoods while pregnant and feel that it really helped htem get the extra greens that they couldnt eat!