Researchers at Seoul National University of Science and Technology report that incorporating brown seaweed into meals may help lower blood sugar levels. The findings are discussed in a nutrition-focused publication and reflect a broader conversation on natural foods and metabolic health.
To determine if seaweeds such as Laminaria digitata, Undaria pinnatifida, Ascophyllum nodosum, and Fucus vesiculosus can support normal blood sugar and insulin balance, researchers reviewed a wide range of nutrition studies related to diabetes. The current synthesis draws on results from 23 investigations conducted by scientists around the world, bringing together diverse populations and dietary contexts to assess potential benefits.
Brown seaweed has a long history of use, particularly in parts of Asia, and is thought to offer multiple health advantages related to metabolism. It supplies valuable protein, dietary fibre, carotenoids, polysaccharides and polyphenols, plant compounds that help protect cells from oxidative damage and may influence metabolic pathways tied to glucose handling.
Analyses of the compiled data show that brown seaweed consumption did not produce a significant change in fasting blood insulin levels. Yet the studies indicate an average reduction in glucose levels of around 16.5 percent with consistent intake. In one trial, participants consumed at least 1,000 milligrams of seaweed or seaweed extract daily, a dietary amount that correlated with improved insulin sensitivity and a shift toward easier glucose regulation.
In practical terms, this means body tissues may respond more effectively to the hormone insulin. When insulin sensitivity improves, glucose is more readily delivered to cells for energy, and the overall burden of excess glucose on the body decreases. This pattern aligns with a lower risk profile for developing insulin resistance and supporting healthier metabolic function over time.
Historically regarded as a wholesome option for individuals managing obesity and diabetes, brown seaweed now stands alongside other dietary components that may support metabolic health as part of a balanced, plant-forward eating pattern. Ongoing research continues to explore precise amounts, preparation methods, and long term effects to help people make informed dietary choices. Citation: studies aggregated from international nutrition research on seaweed and metabolic health for diabetes management.