Brazilian Honey & Cocoa Shells: New Sustainable Food & Cosmetic Ingredient

A novel blend of native bee honey and cocoa bean shells is offering a surprising new flavor profile – and potentially, a boost of health benefits. Researchers in Brazil have developed a method to infuse honey with compounds from discarded cocoa shells, creating a “chocolate honey” rich in antioxidants and compounds linked to heart health. The innovation, detailed in ACS Sustainable Chemistry & Engineering, addresses both food waste and the growing demand for natural, functional foods.

From Byproduct to Benefit: Extracting Value from Cocoa Shells

The project, led by researchers at the State University of Campinas (UNICAMP) in São Paulo, Brazil, centers around a clever use of resources. Cocoa bean shells, a significant byproduct of chocolate production, are often discarded. However, they contain valuable bioactive compounds like theobromine and caffeine, both known for their potential cardiovascular benefits. The challenge was finding a way to effectively extract these compounds. The team turned to native bee honey as a natural solvent. Unlike European honeybee honey, native Brazilian bee honey generally has a higher water content and lower viscosity, making it ideal for drawing out these beneficial compounds.

“Of course, the biggest appeal to the public is the flavor, but our analyses have shown that it has a number of bioactive compounds that make it quite compelling from a nutritional and cosmetic point of view,” explains Felipe Sanchez Bragagnolo, the study’s first author. The resulting honey exhibits a pronounced chocolate flavor, the intensity of which varies depending on the proportion of cocoa shells used. Further sensory testing is underway to refine the flavor profile.

Ultrasound-Assisted Extraction: A Green Chemistry Approach

The extraction process isn’t simply mixing honey and shells. Researchers employed ultrasound-assisted extraction, a technique gaining traction in the food industry for its efficiency and environmental friendliness. A probe emitting sound waves is immersed in the honey-shell mixture. These waves create microscopic bubbles that collapse, briefly raising the temperature and helping to break down the shells, releasing the desired compounds into the honey. SciTechDaily reports this method is faster and more efficient than many conventional extraction techniques.

The sustainability of the process was formally assessed using Path2Green software, developed at UNICAMP. The analysis, which considers factors like transportation, purification and application, awarded the product a score of +0.118 on a scale of -1 to +1, indicating a strong alignment with the principles of green chemistry. The use of a locally sourced, edible solvent was a key advantage.

Biodiversity and Honey Selection

The choice of honey wasn’t arbitrary. The researchers tested honey from five different Brazilian native bee species – borá (Tetragona clavipes), jataí (Tetragonisca angustula), mandaçaia (Melipona quadrifasciata), mandaguari (Scaptotrigona postica), and moça-branca (Frieseomelitta varia). Mandaguari honey was initially used for process optimization due to its moderate water content and viscosity. However, the process can be adapted to utilize honey from other locally available sources, as honey composition is influenced by environmental factors like climate and storage conditions. This adaptability underscores the project’s commitment to supporting local biodiversity and sustainable practices.

Beyond Flavor: Potential Health and Cosmetic Applications

Although the appealing chocolate flavor is likely to be a major draw for consumers, the researchers emphasize the potential health benefits. The increased levels of phenolic compounds in the chocolate honey contribute to its antioxidant and anti-inflammatory properties. Antioxidants aid protect cells from damage caused by free radicals, which are linked to aging and various diseases. Theobromine and caffeine, extracted from the cocoa shells, are also associated with improved cardiovascular health, though more research is needed to confirm these effects in the context of chocolate honey consumption.

The potential extends beyond food. Bragagnolo suggests the product could also find applications in the cosmetic industry, leveraging the antioxidant properties for skincare formulations.

What’s Next: Commercialization and Shelf Life Studies

The team is currently working with INOVA UNICAMP, the university’s innovation agency, to secure a commercial partner to license the patented method and bring the chocolate honey to market. FAPESP provides further details on the innovation process.

Further research is planned to investigate the product’s shelf life and microbiology. The researchers hypothesize that the ultrasound treatment may also eliminate microorganisms present in the honey, potentially reducing the need for refrigeration or pasteurization – a common requirement for native Brazilian bee honey. This could significantly enhance the product’s stability and convenience. They also intend to explore the use of native bee honey as a solvent for extracting compounds from other plant residues, expanding the potential for sustainable food processing.

The development of chocolate honey represents a promising intersection of flavor, sustainability, and potential health benefits. As the project moves towards commercialization, ongoing research will be crucial to fully understand its properties and unlock its full potential. Consumers interested in learning more about the health benefits of honey and cocoa can consult resources from organizations like the National Honey Board and the World Cocoa Foundation.