A New Paradigm: From 2D Flats to 3D Life

For decades, nutritional evaluation relied on two-dimensional cell cultures and animal models. However, 2D cells cannot replicate the complex 3D structures of human organs, and animal models often fail to accurately predict human biological responses due to species differences. While human clinical trials remain the "gold standard," they are costly, time-consuming, and ethically constrained.

Enter organoids—often described as "mini-organs in a petri dish". These are 3D structures grown from stem cells that self-organize and differentiate to mimic the architecture and functional complexity of real organs, such as the gut, liver, or brain.

"The greatest advantage of organoids is their high physiological relevance," explains Professor Wang Hui, the study's corresponding author. "They provide an unprecedented window into the dynamic behavior of nutrients within the human body".

Six Scenarios: How Organoids Reshape Nutrition

The review, published in the journal Food Science by the team of Wang Hui and He Hua from the Shanghai Jiao Tong University School of Public Health, identifies six key areas where this technology is making an impact:

· Unlocking the "Black Box" of Absorption: Researchers can now visually observe how nutrients like fatty acids and vitamins are transported across the intestinal epithelium.

· Verifying Functional Foods: Organoids provide a high-efficiency platform to validate the health claims of prebiotics and dietary supplements. For instance, studies show inulin can stimulate organoids to produce appetite-suppressing hormones.

· Simulating Food Allergies: Scientists can recreate allergic reactions at the molecular level to see how allergens breach the intestinal barrier.

· Ensuring Food Safety: Organoids serve as a powerful tool for toxicity testing, revealing how food additives or packaging contaminants (like PFAS) may impact organ health or even trigger neurotoxicity.

· Exploring the "Gut-Brain Axis": Brain organoids are helping scientists understand how nutrients like folic acid and Vitamin A protect neurons and influence cognitive health.

· Empowering Personalized Nutrition: In the future, a person's own cells could be used to grow "personal organoids" to test specific diets and supplements, moving from general recommendations to truly customized nutrition.

The Future: "Nutritional Simulated Life"

While the potential is vast, challenges remain, including high cultivation costs and a current lack of vascular and immune systems in most models.

To overcome this, Professor Wang Hui envisions a "Nutritional Simulated Life" platform. This would involve "Organ-on-a-Chip" technology—connecting different organoids (gut, liver, brain) via microfluidic systems to simulate a nutrient's entire journey through the body. Combined with 3D bioprinting, gene editing, and AI, this technology is set to become the cornerstone of a new era of precision health.

About the Study: The lead author is Associate Professor He Jian, and the corresponding author is Professor Wang Hui. This research was supported by the National Key R&D Program of China.