Dr. Ananda Nanjundaswamy at South Dakota State University is on a mission. He’s developing natural pigments from microbes to replace synthetic food dyes, particularly as the FDA is set to ban Red No. 3 by 2027. At the Dakota BioWorx POET Bioprocessing Center, his team utilizes local agricultural byproducts like molasses and corn syrup to grow these pigment-producing microbes. This innovative approach not only offers a healthier alternative but also supports local farmers by adding value to their products.
After successfully producing 70-liter pilot batches, the project aims for commercial production. This could make South Dakota a frontrunner in the natural colorant market—an industry that could disrupt the $1 billion synthetic dye sector in the U.S.
Dr. Nanjundaswamy believes that the students involved in this research are entering a rapidly growing field. “Bioprocessing and fermentation technology for natural pigments will drive growth in the next few years,” he says. He’s also keen on developing a skilled workforce in this area.
Microbial production of carotenoids offers key advantages. Traditional methods can take months, while microbes can produce pigments in just a few days. For instance, carotenoids give color to various foods and are rich in health benefits, including eye health support. They can be found in yellow and orange foods, like carrots and pumpkins.
Surprisingly, the color of animal feed matters too. Many consumers are drawn to brightly colored meat and eggs, often associating vivid colors with quality. Currently, 90–98% of color additives in animal feed are synthetic. By replacing these with natural pigments, Dr. Nanjundaswamy aims to improve food products without resorting to artificial options.
For example, farmed salmon gets its bright orange color from a carotenoid called astaxanthin. However, the synthetic version may not be as effective. Dr. Nanjundaswamy’s research seeks to fill the gap for a natural alternative, benefiting both the fish and end consumers.
The potential for savings and improved quality extends to animal products as well. Natural pigments like beta carotene can enhance shelf life and quality in milk and meat products. Using agricultural byproducts like sugar beet molasses, a low-value input, can significantly boost the value of end products. This shift not only makes financial sense but also aligns with sustainability goals, contributing to a circular economy.
Interestingly, some ingredients considered unhealthy, like high fructose corn syrup, can be transformed into nutritious products through microbial processes. This change demonstrates how innovative practices can redefine the value of common ingredients.
In the future, Dr. Nanjundaswamy’s research may extend beyond food. The pigments could also find applications in personal care products, such as cosmetics, providing an opportunity to reduce reliance on synthetic colors in that industry as well.
As we move forward, the demand for natural alternatives will likely grow. More data suggests that consumers are shifting preferences towards healthier options. Reports show that 70% of consumers prefer natural ingredients in their food. This research aligns perfectly with those trends and could lead to a new wave of natural products in various sectors.
Dr. Nanjundaswamy’s work exemplifies how science and agriculture can blend to create healthier choices for consumers, while also boosting local economies. As a result, this initiative could set a benchmark for future innovations in food technology.
