In October, consumers began reporting cases of gastrointestinal distress, including symptoms like nausea, diarrhea, and vomiting, after eating Soylent Bars and a specific version of the company's powder. Soylent recalled the bars, stopped selling the latest powder mix, and investigated. After looking into the formula issues, the company believes that all those who experienced GI distress ate a product containing algal flour, Rob Rhinehart, the co-founder of Soylent, told Bloomberg Technology. Soylent uses AlgaVia, a whole algae powder manufactured by a company called TerraVia. You can find the ingredient on Soylent's nutrition facts label as "whole algal flour." TerraVia describes the Protein-Rich Whole Algae powder's composition as 63% protein, 19% carbohydrates, 11% lipid, 4% ash, and 3% moisture. It is currently unclear why the flour made customers sick, while people who ate products with algal oil did not become ill. The algal flour product received an initial "no questions" letter from the U.S. Food and Drug