Key findings
- 1Ultrafiltration separates milk into water, lactose, fat, protein, and minerals through polymer membranes, then reassembles them in custom ratios
- 2Fairlife has 50% more protein and 50% less sugar than regular milk, achieved through industrial fractionation, not traditional dairy processing
- 3The membrane technology used was adapted from pharmaceutical and water treatment applications
What goes into Fairlife Milk products?
Fairlife's process goes well beyond pasteurization: raw milk is pushed through a series of increasingly fine polymer membranes in a process called cold ultrafiltration. These membranes sort molecules by size; first removing fat, then separating protein from lactose and water. The components are then recombined: more protein is added back (50% more than regular milk), most lactose is removed (reducing sugar), and lactase enzyme is added to break down remaining lactose for lactose-free claims. This membrane filtration technology was originally developed for pharmaceutical and industrial applications. The result is nutritionally engineered milk. 13g protein and 6g sugar per cup vs regular milk's 8g protein and 12g sugar, but it is fundamentally a deconstructed and reconstructed food.
How 26 fairlife milk products break down
Share of products at each processing level, in our analysis.
Fairlife Milk brand comparison
From least to most processed in our database.
How to read a fairlife milk label
- 1
Fairlife lists: ultra-filtered milk, lactase enzyme: a short ingredient list for a multi-step process
- 2
The "ultra-filtered" designation indicates membrane separation and reassembly of components
- 3
Higher protein (13g vs 8g) and lower sugar (6g vs 12g) are achieved through industrial separation, not by adding or removing ingredients traditionally
- 4
Compare with regular milk's single ingredient: this is engineered nutrition from the same source
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Frequently asked questions
Is Fairlife milk healthier than regular milk?
Fairlife has more protein and less sugar, but its products are more processed than plain milk: of the 26 Fairlife products we score, 14 are Level 4 (ultra-processed) and 7 are Level 2. The nutritional differences come from industrial membrane separation that restructures the milk's component ratios. Whether the adjusted nutrition profile offsets the increased processing is a personal judgment.
How is Fairlife different from regular milk?
Regular milk is pasteurized and homogenized; two physical processes. Fairlife adds ultrafiltration: milk is pushed through membranes that separate its components, which are then recombined in different proportions. It is fundamentally deconstructed and reassembled milk.
Is Fairlife lactose-free?
Yes. The ultrafiltration process removes most lactose, and lactase enzyme breaks down what remains. This is a more industrial approach than simply adding lactase to regular milk, which is what most lactose-free milks do (like Lactaid).