Is the Impossible Burger Vegan?
Yes — the Impossible Burger is vegan. All ingredients in the Impossible Burger are plant-derived or produced through fermentation without animal exploitation. The burger is certified vegan by the Vegan Society and carries explicit vegan labeling from Impossible Foods. The ingredient that occasionally generates questions is “soy leghemoglobin” (called heme) — but this is produced through yeast fermentation using a gene from soybean roots and does not involve animal slaughter.
What Is Soy Leghemoglobin (Heme)?
Soy leghemoglobin is a protein found naturally in the root nodules of soybean plants. Impossible Foods produces heme by inserting the gene coding for leghemoglobin into yeast and fermenting it in tanks. No soybeans or animals are slaughtered in this process. The FDA reviewed the ingredient and granted GRAS (Generally Recognized as Safe) status in 2019.
Impossible Burger vs. Beyond Burger
| Feature | Impossible Burger | Beyond Burger |
|---|---|---|
| Primary protein | Soy protein | Pea protein |
| Heme ingredient | Soy leghemoglobin (fermentation) | Beet juice extract |
| Non-GMO certified | No | Yes |
| Soy-free | No | Yes |
| Vegan certified | Yes | Yes |
Restaurant Preparation Caveat
Even though the Impossible Burger patty is vegan, restaurants may prepare it with dairy butter on the bun, non-vegan condiments, or on a shared grill with meat. Specify your requirements when ordering.
FAQ
Is the Impossible Burger safe for people with soy allergies? No. The Impossible Burger contains soy protein. People with soy allergies should choose soy-free alternatives like the Beyond Burger.
Is the Impossible Burger healthier than beef? It has similar calories and fat to lean beef but significantly less saturated fat, no cholesterol, and more sodium. It is a processed food — appropriate as an occasional choice, not a daily protein staple.
For plant-based protein powder options, visit the protein powder hub. More answers in the Is This Vegan? Q&A category.