Researchers at Rajamangala University of Technology, Thanyaburi, have developed a method to extract calcium from by-products from the fish processing industry, turning what is essentially waste into a high-value product.
A team from the Faculty of Integrative Medicine, led by Assoc Prof Watchara Damjuti, developed a method to extract calcium from discarded parts of blackchin tilapia, including heads, bones, scales and tails -- materials typically treated as waste and a source of pollution.
"We saw an opportunity to convert this underutilised biomass into a high-value nutritional product," Assoc Prof Watchara said.
He said the process uses environmentally friendly techniques to produce purified calcium carbonate, which is then used to produce a supplement called "SARO Calcium Plus".
Watchara: Adding value to waste
Laboratory analysis found the product to be free from heavy metals and microbial contamination, with a calcium content of 12-15%, comparable to calcium derived from other species of fish such as salmon.
"The supplement could help strengthen bones and teeth, reduce the risk of osteoporosis, and support muscle and nerve function," the research team noted. "This provides an accessible alternative source of calcium for consumers of all ages, particularly older adults," he said.
In Thailand, the recommended calcium intake is about 1,000 milligrammes per day, yet many people fall short, partly due to low dairy consumption.
Beyond dietary supplements, the extracted bio-calcium has potential applications in personal care and health products, including toothpaste. Researchers noted the method also reduces waste, odour and wastewater contamination from fish-processing industries.
"This demonstrates how scientific research, integrative medicine, and sustainable resource management can work together to create value," Assoc Prof Watchara said.