Impossible Foods is a synthetic meat company.

The ingredient, made from soybean roots and genetically engineered yeast, goes into vegetarian Impossible Burgers, which are available in a growing number of restaurants — even fast-food stalwart White Castle…

It contains heme (pronounced HEEM), a key part of red meat and a source of iron, which humans can’t live without. Think of Brown’s discovery as plant-based blood. Brown, 63, says it makes the Impossible Burger sizzle, smell and taste like real red meat…

Fake meat will be one of the year’s hottest food trends. An increasing number of flexitarians — people not looking to eat meat at every meal — are helping to drive interest, according to Rabobank. Sales of alternative proteins are dwarfed by the $49 billion red meat and chicken market, but they’re expected to grow about 17 percent a year to $863 million in 2021, according to a CoBank estimate.

Apparently the company is having some trouble with the FDA, which it voluntarily sought approval from.