Vegan meal planning service Daily Harvest is recalling its plant-based French Lentil + Leak Crumbles and urging customers who received it to throw it away after several people reported gastrointestinal problems after eating it.

Customers have reported acute stomach pains on social media, and some have claimed their livers and gallbladders were damaged by eating the dish.

We launched an investigation to determine the root cause of the reported health problems,” the company said in an updated recall notice on Wednesday. We are working closely with the FDA and multiple independent laboratories to investigate this matter,” noting that it is working with microbiologists and allergy experts as well as toxin and pathogen specialists. However, it said its tests have so far come back negative.

“We are doing everything we can to identify the root cause as soon as possible,” Daily Harvest added.

Crumbles are a meat substitute that are typically heated and browned in a skillet. Although they are not meat, the company’s website still recommends cooking them to an internal temperature of 165 degrees Fahrenheit, the same as chicken.

The recall is not listed on the FDA’s recall website, possibly because the product was sold directly to customers, rather than through grocery stores. However, last year, the FDA proposed to regulate meal planning services. Areas of concern include determining the origin of its ingredients and the refrigerated packaging of items such as meat.

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Daily Harvest is offering a $10 credit to customers who purchase this dish. Those who wish to declare it can submit a report via the website or email.

Founded in 2015, New York-based Daily Harvest produces frozen fruit- and plant-based meals and smoothies that are then delivered to customers’ homes, where they simply need to heat or blend them before serving.

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