then blended and encapsulated by NAI, who produce the finished product. Juice Plus capsules are "enriched with pure β-carotene, ascorbic acid, vitamin E, and folic acid". Two NAI-sponsored studies mention that the fruit and vegetable powders in Juice Plus include standardized levels of natural β-carotene derived from Dunaliella salina and soy-derived d-α-tocopherol (vitamin E), which are supplied by the Henkel Corporation (now doing business as Cognis Corporation), and ascorbic acid derived from acerola cherry, which is supplied by Schweizerhall Pharma. ConsumerLab product testing Juice Plus+ Garden Blend was tested by ConsumerLab.com in their Multivitamin and Multimineral Supplements Review of 38 of the leading multivitamin/multimineral products sold in the U.S. and Canada. Testing included amounts of selected index elements, their ability to disintegrate in solution per United States Pharmacopeia guidelines, lead contamination threshold set in California Proposition 65, and meeting U.S. Food and Drug Administration (FDA) labeling requirements. Garden Blend failed ConsumerLab's test as it contained only 76.4% of its claimed calcium, which was noted was low to start (labeled as just 4% of the Daily Value per serving.) On 23 June 2011, ConsumerLab was informed of misinformation circulated by a Juice Plus distributor incorrectly stating the variation was due to the analytical method used. ConsumerLab responded that their analytic method used was ICP-MS (Inductively Coupled Plasma Mass Spectrometry), a "highly precise and sensitive method of testing calcium". ConsumerLab also noted that the calcium deficiency in Juice Plus was confirmed with this method in two independent laboratories prior to publication of their Review. Sales Juice Plus products are marketed by individual distributors who receive sales commissions ranging from 6% (for enrolling five customers in 30 days) to 14% (for enrolling 20 customers in 30 days). Detailed sales figures for Juice Plus are not publicly available, but NSA representatives claimed that Juice Plus achieved monthly sales of $6 million USD in 1993 and that it was the company’s most successful new product. According to NSA vice-president John Blair, sales of Juice Plus in 2008 were "approaching 300 million but have leveled off due to economic factors." Product research Doubts have been raised about the advertised benefits of Juice Plus by Memorial Sloan-Kettering Cancer Center, University of California Berkeley, Center for Science in the Public Interest, and other sources. The product has been criticized on the basis that: its marketing is unsupported by research data, it contains too little fruit and vegetable powder