Refined fiber in processed food could harm your health

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Eating foods naturally high in fiber is widely recognized as beneficial to our health.

However, a study conducted by Georgia State University and other institutions suggests that adding highly refined fibers to processed foods, something increasingly common, might be detrimental to our health, potentially promoting liver cancer.

This raises critical questions about recent changes in U.S. Food and Drug Administration rules, which now allow foods containing supplemented fibers to be marketed as health-promoting.

Aiming for Health Benefits

The rising consumer awareness about the lack of fiber in their diets and the established health benefits of fiber-rich whole foods have prompted the food industry to enrich processed foods with highly refined soluble fibers, such as inulin.

This addition of refined fiber to processed foods was theorized to help counter obesity-related complications. The researchers put this hypothesis to test, using mice as subjects, and the results were surprising and alarming.

Unanticipated Consequences

While the diet enriched with refined inulin did manage to ward off obesity in mice, it triggered unexpected repercussions. Some mice developed jaundice, and after six months, a considerable number of them had liver cancer.

This implies that consuming foods with purified fibers might not bestow the same benefits as eating fruits and vegetables naturally rich in soluble fiber.

Instead, it could lead to severe health conditions like liver cancer. Although the study was carried out on mice, it raises serious concerns regarding human consumption of highly refined, fermentable fiber in enriched processed foods.

Rethinking Food Regulations

This study spotlights the need for a meticulous evaluation of the health implications of consuming purified diet and questions the recent FDA rule change, allowing the marketing of fiber-fortified food as health-promoting.

The researchers believe that this move is ill-conceived and should be reassessed to ensure consumer safety.

There is a pressing need for more human studies focusing on the impact of purified fiber consumption, especially concerning liver health.


The study by Dr. Matam Vijay-Kumar and colleagues, published in Cell, brings to light the potential health hazards of adding refined fiber to processed foods, a practice deemed beneficial until now.

While the consumption of naturally fiber-rich foods has undeniable health advantages, the findings of this research underline that artificially adding fiber to foods might not replicate these benefits and could even pose significant health risks, such as liver cancer.

In light of these findings, consumers should approach fiber-enriched processed foods with caution, and further human studies are essential to validate these results and explore the implications on human health.

Meanwhile, it is crucial for the relevant authorities to reconsider the regulations allowing the promotion of fiber-fortified foods as healthy and ensure the safety of consumers who are progressively opting for what they believe are healthier food choices.

Whether a lover of nutrition science or a casual reader, understanding the implications of our food choices has never been more critical, making such revelations central to our collective wellbeing.

If you care about nutrition, please read studies about the best time to take vitamins to prevent heart disease, and vitamin D supplements strongly reduce cancer death.

For more information about nutrition, please see recent studies about plant nutrient that could help reduce high blood pressure, and these antioxidants could help reduce dementia risk.

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