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Milk types

How is standardised milk made?

Quick answer

Standardizing milk means adjusting its fat or solids to a set level. Under U.S. rule 21 CFR 131.110, milk for drinking must contain at least 3 1/4 percent milkfat and 8 1/4 percent milk solids not fat, and it may be adjusted by separating part of the milkfat or by adding cream, condensed milk, dry milk or concentrated skim milk.

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In this article
  1. What does standardised milk mean?
  2. How is milk standardized?
  3. What levels must standardized milk reach?
  4. Is standardization the same as pasteurization or homogenization?

What does standardised milk mean?

Standardizing (US spelling) means adjusting the fat and solids in milk so every batch meets the same composition. Raw milk varies, so makers adjust it. This section follows the U.S. definition of milk in 21 CFR 131.110; other countries have their own rules, which we did not check.

How is milk standardized?

The regulation says milk may be adjusted in two directions:

  • Lower the fat: by separating part of the milkfat from the milk.
  • Raise fat or solids: by adding cream, and by adding condensed milk, whole dry milk, concentrated skim milk or nonfat dry milk to raise the milk solids not fat.

What levels must standardized milk reach?

Milk in final package form for beverage use must contain not less than 3 1/4 percent milkfat and not less than 8 1/4 percent milk solids not fat.

Is standardization the same as pasteurization or homogenization?

No. The page we read describes the adjustment of fat and solids only. Pasteurizing and homogenizing are separate steps, and we did not take claims about them from this source. Lower-fat milks such as reduced-fat or skim have their own definitions in the same rule family, which we did not open.

People also ask

What is standardised milk?

Milk whose fat and milk solids not fat have been adjusted to a set level. In the U.S., drinking milk must have at least 3 1/4 percent milkfat and 8 1/4 percent solids not fat (21 CFR 131.110).

How is milk standardized?

By separating part of the milkfat, or adding cream, condensed milk, dry milk or concentrated skim milk, according to 21 CFR 131.110.

What is standardization of milk?

It is the adjustment of milk composition, mainly fat and solids, so each batch meets the same standard.

General information only, not medical advice. If you have a health condition or are pregnant, ask your doctor before changing what you drink.

Sources

  1. Cornell LII (eCFR text): 21 CFR 131.110 Milk, read 5 Nov 2026
Written by Drinks Type Editorial Team · Published Aug 7, 2025 · Updated Nov 5, 2026
About · How we verify this · Editorial policy · Corrections

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