Why milk and coffee don't mix well for antioxidants
An Overview of Interactions between Goat Milk Casein and Other Food Components: Polysaccharides, Polyphenols, and Metal Ions
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Milk has a protein called casein that grabs onto healthy plant chemicals in coffee and tea, making them harder for your body to use. It also sticks to sugar chains and minerals in food, changing how dairy feels and works.
Surprising Findings
Casein can form covalent bonds with polyphenols through oxidation — meaning the protein and plant compound chemically fuse together, not just stick.
People assume binding is temporary and reversible, but this shows milk can permanently alter polyphenol structure — potentially making them unrecognizable to the body.
Practical Takeaways
If you drink coffee for antioxidants, try it black — or add plant-based milk (which lacks casein) if you need creaminess.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Milk has a protein called casein that grabs onto healthy plant chemicals in coffee and tea, making them harder for your body to use. It also sticks to sugar chains and minerals in food, changing how dairy feels and works.
Surprising Findings
Casein can form covalent bonds with polyphenols through oxidation — meaning the protein and plant compound chemically fuse together, not just stick.
People assume binding is temporary and reversible, but this shows milk can permanently alter polyphenol structure — potentially making them unrecognizable to the body.
Practical Takeaways
If you drink coffee for antioxidants, try it black — or add plant-based milk (which lacks casein) if you need creaminess.
Publication
Journal
Foods
Year
2024
Authors
Bohan Ma, Majida Al-Wraikat, Qin Shu, Xi Yang, Yongfeng Liu
Related Content
Claims (6)
When casein (a protein in milk) meets polyphenols (natural compounds in tea, wine, or fruit), they stick together in different ways—like magnets and glue—and this changes the protein’s shape and how it works.
When milk proteins (casein) mix with certain plant-based fibers (polysaccharides), they can either stick together or push apart based on conditions like acidity and salt levels, changing how the final dairy product feels and looks.
Casein, a protein in milk, sticks to certain plant compounds and minerals differently depending on things like how acidic the environment is, how hot it is, or how salty the solution is — and also depends on the shape and size of the stuff it’s sticking to.
Milk has a protein called casein that grabs onto calcium like a magnet, helping it form tiny clumps that stay suspended in milk instead of sinking or separating.
Casein, a protein in milk, seems to grab onto certain metal bits like silver and zinc more than others because its building blocks have spots that naturally stick to those metals.