Foie Gras created using molecular mimicry, without the need for power

French delicate foie gras could be made more ethically thanks to techniques that replicate the way fat is metabolized in forced birds, but the process still relies on farm animals.

Foie gras is made from duck or goose liver that is forcefully applied via tubes. This process, known as gavage, causes organs to expand to ten times the normal amount as the animal stores excess fat.

Researchers say the experience of eating foie gras depends not only on its high fat content, but also on its microscopic distribution of its fat.

now Thomas Birgiss At the Max Planck Institute, the Polymer Institute in Mainz, Germany and his colleagues developed a new process that uses the same bird fat to create the same texture from ducks or geese normally raised and slaughtered into the liver.

“I’m a huge fan of foie gras,” says Birgis. “I was fascinated by this mouthfeel – it was so different to the other putty – so I asked myself, what is it?”

His team had previously tried to make foie gras with putty in the same proportion of fat and liver ratio, but the results were disappointing. In further experiments, collagen was added to replicate the density of foie gras, but it gave me something that felt like a gum in my mouth.

Vilgis then realized that releasing enzymes that divide fat before storing them in the liver is a way to efficiently store large fat molecules as smaller crystalline substances.

He and his colleagues discovered that this process can be replicated by treating fat with an enzyme called yeast lipase. Candida Lugosa. “Lipases are molecular sizers,” says Birgis. Next, the processed fat is mixed with the liver to create fake foie gras.

The team conducted numerous scientific tests, including nuclear magnetic resonance spectroscopy, and compared fake foie glasses with real samples, resulting in promising results. Importantly, however, Vigoris says that the aroma and taste are “substantially not different” from the real thing.

The process is currently patented and researchers are discussing with the industry about commercializing the industry and bringing counterfeit gras to the market.

Due to ethical concerns, and in some countries, including the UK, many alternatives have been developed previously that claim to produce similar results, as it is traditionally illegal to produce foie gras. Also, at least two companies are trying to bring it in Lab-grown foie gras are available on the market.

Dawn Car People for Ethical Animal Treatment (PETA) says lab-fed meat is a more ethical route than a new lipase process that involves animal care and genocide. “We don’t need to kill animals for a fleeting taste moment,” Kerr says. “The future of foie gras is already here, and it doesn’t require any power or throat slits.”