Soylent, the liquid-meal maker popular with millennials and tech programmers, has now stopped sales of its flagship powder over a series of complaints that it makes customers sick. It had already stopped shipments of its nutrition bars over concerns that it was responsible for vomiting, upset stomachs, and diarrhea. The Los Angeles company announced that a common ingredient in both products has caused the issue but said the investigation into the matter isn’t yet completed. The products, developed by software programmers looking to save time and money on meals, have been backed by $20 million in venture capital. Soylent is now one of the most popular startups aiming to change how and what Americans consume. The premade drinks, according to the company, are still being sold and shipped, though they are slightly more expensive than the powder.