They might be better for the planet, but are plant-based burgers good for you?

By Lisa Drayer, CNN

Updated 2102 GMT (0502 HKT) August 14, 2019

Plant-based burger patties made by Impossible Foods contain a genetically modified version of heme, an iron-containing molecule from soy plants, which is what gives them a meaty flavor.
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Plant-based burger patties made by Impossible Foods contain a genetically modified version of heme, an iron-containing molecule from soy plants, which is what gives them a meaty flavor.
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Vegan soy bratwurst has become a popular choice in Germany, allowing meat-lovers to cut meat from their diets without necessarily changing them too much. Meat-free diets have come a long way, with a variety of alternative options.
Photos: The top meat substitutes
Vegan soy bratwurst has become a popular choice in Germany, allowing meat-lovers to cut meat from their diets without necessarily changing them too much. Meat-free diets have come a long way, with a variety of alternative options.
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Fried cabbage with bread crumbs -- the vegan version of traditional German schnitzel -- looks just like its meat counterpart but with healthier ingredients.
Photos: The top meat substitutes
Fried cabbage with bread crumbs -- the vegan version of traditional German schnitzel -- looks just like its meat counterpart but with healthier ingredients.
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Organic tofu is the base for many vegan and vegetarian meals.
Photos: The top meat substitutes
Organic tofu is the base for many vegan and vegetarian meals.
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Seitan is a meat alternative made from gluten, or wheat protein.
Photos: The top meat substitutes
Seitan is a meat alternative made from gluten, or wheat protein.
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Tempeh is a traditional Indonesian product made from fermented soy.
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Tempeh is a traditional Indonesian product made from fermented soy.
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"Turkey" made from tofu or seitan -- often sold under the Tofurky brand -- is especially popular around the holidays.
Photos: The top meat substitutes
"Turkey" made from tofu or seitan -- often sold under the Tofurky brand -- is especially popular around the holidays.
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Quorn is a meat alternative derived from fungus, mixed with an egg- or potato-based binder.
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Quorn is a meat alternative derived from fungus, mixed with an egg- or potato-based binder.
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Patties made of potatoes, green peas, carrots and green beans, garnished with green onion, are another option for lunch or dinner.
Photos: The top meat substitutes
Patties made of potatoes, green peas, carrots and green beans, garnished with green onion, are another option for lunch or dinner.
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Slices of halloumi cheese can serve as a meat alternative at barbecues.
Photos: The top meat substitutes