Pure, Plant-based + Highly Bioavailable Formulas Trusted by Kiwis for Over 40 Years. We believe the most effective nutrition for the human body is found in plant-based wholefoods. Lifestream’s plant-based formulas are derived from wholefood natural sources, such as fruits, vegetables, ancient herbs, and algae that are naturally rich in nutrients + essential vitamins, minerals and antioxidants.