Soylent is pulling its meal-replacement powder from the market in light of trickling reports of customer illnesses. As Ars previously noted, the company already pulled its snack bars earlier this month after customers online said they suffered gastrointestinal distress, some "violent." However, in an update late Thursday, the company acknowledged that it had received a small number of similar complaints from customers who consumed the latest powder line, Soylent 1.6. The company now thinks they’re connected and that the link could finally help them identify the source of the problem.

In an online blog post Soylent said:

For the past several weeks, we have worked aggressively to uncover why people were having these negative experiences. This has included product testing, an exhaustive industry search, and discussions with many of our suppliers. Our tests all came back negative for food pathogens, toxins or outside contamination… Interestingly, we didn’t see similar complaints during the 1.5 formulation. This possible connection allows us to narrow the field considerably given there are only a few ingredients that are specific to only our bars and Powder 1.6.

Ars reached out to Soylent to ask what those ingredients are, but we haven’t received a response yet. We’ll update when we do. However, based on online ingredient listings for the three products, the likely top suspects include Whole Algal Flour, Isomaltooligosaccharide (a non-digestible, low-calorie sweetener made of short-chain carbohydrates), and a Soy Protein Isolate.

When Ars last spoke to a source close to the company, they said that soy proteins were a likely culprit behind illnesses linked to the bars. According to the source, the bars contained a mixture of three soy protein products that may not be evenly mixed into the bars. A high dose of one of the soy proteins in an odd bar could potentially trigger an intolerance in some customers, appearing as digestive trouble, the source explained. That scenario is plausible given that the company has ruled out contamination issues, and many of the sick customers had already ruled out allergies because they had eaten the same bars as well as other Soylent products in the past with no problems.

In yesterday’s announcement, Soylent said it will quickly work to reformulate the bars and the powder—perhaps reinstating ingredient formulations from Soylent 1.5—and have both products back on the market in early 2017. The company's other products, the Soylent drink and Coffiest, are not affected.

The company also said it will share data with the Food and Drug Administration to help with the continuing investigation into the illnesses and problem ingredient.

This article will be updated as more information becomes available.