Nonfat milk

Cow’s milk with most fat removed (≈0% fat) but still naturally rich in high-quality protein (casein+whey), lactose, calcium, and B vitamins.

Should I eat Nonfat milk?

If you tolerate lactose, nonfat milk is a nutrient‑dense, low‑fat way to get complete protein and calcium. The main caveat is lactose intolerance; consider lactose‑free versions if you’re sensitive.

Summary

Nonfat milk is made by removing most of the cream from cow’s milk, then pasteurizing and homogenizing it under regulatory standards. It retains complete dairy protein with excellent amino acid quality and has a low glycemic index. However, it still contains lactose, and a typical cup can exceed some people’s tolerance, causing GI symptoms. Milk can also produce a relatively strong insulin response even with a low GI, so individuals managing diabetes may want to monitor personal responses. Not recommended as the main drink before 12 months of age.

Key Research Benefits

High-quality complete protein

Nonfat milk supplies complete dairy protein with excellent amino acid quality (DIAAS >100), supporting daily protein needs.

Low fat, fewer calories than whole milk

By removing cream, nonfat milk retains nutrients with very little fat, contributing fewer calories than whole milk.

Low glycemic index

Skim milk has a low GI (~32), which tends to produce a slower rise in blood sugar compared with many carbohydrate foods.

Key Research Risks

Lactose intolerance symptoms

About 12–13 g lactose per cup can trigger bloating, gas, or diarrhea in sensitive individuals; symptoms are dose‑dependent and may improve with smaller, spaced servings.

Insulin response despite low GI

Milk’s proteins can produce a relatively high insulin response compared with its low GI, which some people with diabetes may want to factor into meal planning.

Not suitable before 12 months

Cow’s milk should not be the main drink for infants under 12 months; use breast milk or formula until then.

Overview

What is it?

Source: Cow's milk

Method: Separate cream, pasteurize, standardize, homogenize

Processing Level: 4 / 10

Why is it used?

Purpose: Low-fat dairy that provides complete protein, calcium, and B vitamins.

Commonly found in: ready-to-drink milk; protein shakes; breakfast cereals; coffee drinks; meal bars

Why manufacturers choose it: Reliable dairy flavor and complete protein with minimal fat at a widely available, affordable price.

Origin

Skimming cream from raw cow’s milk to make a low-fat ‘skim’ version dates back to traditional butter-making; modern nonfat milk is produced by continuous centrifugal separation of cream, then pasteurization and homogenization to improve safety and texture. In the U.S., federal standards of identity define composition and processing of milk and related products, enabling consistent quality across brands.

Process: Separate cream, pasteurize, standardize, homogenize

Steps

1. Separate: Centrifugal separators remove cream to reach near-zero milkfat.

2. Standardize: Adjust solids-non-fat with skim/nonfat dry milk to target composition if needed.

3. Pasteurize: Heat treat to destroy pathogens per legal requirements.

4. Homogenize: Reduce fat globule size for stable texture and mouthfeel.

5. Package: Fill into cartons/bottles under sanitary conditions; keep refrigerated.

Chemicals

Research & Safety

Research Summary

Nonfat milk is regular cow’s milk with most of the fat removed, then pasteurized and homogenized under standards set in U.S. regulations. It remains rich in complete dairy proteins (casein and whey), with recent work confirming very high amino acid quality (DIAAS >100) for skim milk powder, which is closely related. Skim milk also shows a low glycemic index (~32), meaning it tends to raise blood sugar more slowly than many carb foods. At the same time, some people struggle with lactose—the natural milk sugar. A standard 1‑cup serving delivers about 12–13 g lactose, which can cause gas, bloating, or diarrhea in those with low lactase; tolerance varies by dose and context. Milk can also provoke a relatively strong insulin response despite its low GI, so people who track glucose and insulin responses may wish to see how they personally react. Cow’s milk should not be used as the main drink for infants under 12 months; introduce after 12 months per pediatric guidance.

Digestive Effects

In lactose intolerance, symptoms like gas, bloating, and loose stools can appear after typical servings because the unabsorbed lactose is fermented in the colon. Many people can tolerate around 12 g lactose (about 1 cup) if taken with other foods, and splitting servings across the day often helps. If symptoms persist, consider lactose‑free milk (lactase‑treated) or fermented low‑fat dairy like yogurt/kefir, which generally have less lactose. People without lactose intolerance usually digest nonfat milk well.

Limit Consumption

Infants should not consume cow’s milk as their main drink before 12 months; after that, introduce per pediatric guidance. People managing diabetes may benefit from milk’s low GI but should note the relatively insulin‑stimulating effect and test their own responses. Those with lactose intolerance can trial small portions, take with meals, or choose lactose‑free milk to reduce symptoms.

Fact Sheet

Regulatory Status

US FDA: Not a food additive; standardized dairy food (21 CFR Part 131).

EU Status: Standard food; milk is a mandatory declared allergen (EU 1169/2011 Annex II).

Codex INS: N/A (whole food; Codex standardization applies to milk powders: CXS 207-1999).

JECFA ADI: Not applicable for whole milk.

ESG & Sustainability

Environmental Footprint: Dairy production has a notable GHG and water footprint; farm practices and sourcing (e.g., manure management, feed efficiency) strongly influence impacts.

Sustainability: Choose certified suppliers; consider local/regional sourcing and animal welfare standards.

Animal Welfare: Depends on farm practices; third-party certifications can signal higher standards.

Carbon Footprint: Varies by supply chain; generally higher than most plant milks per serving.

Allergens and Diet

Allergen Status: Milk

Diet Compatibility: Vegetarian, Kosher, Halal, Gluten-free, Non-GMO

Natural Alternatives

Lactose-free milk

Source: Cow’s milk (lactase-treated)

Processing Level: Moderate

Common Uses: Direct beverage, cereals, shakes

Replacement Benefit: Removes lactose as a trigger for lactose-intolerant people while keeping dairy nutrients.

Why it's not used: Standard nonfat milk is cheaper and more widely available; clean-label without enzyme step.

Low-fat kefir/yogurt

Source: Fermented cow’s milk

Processing Level: Moderate

Common Uses: Drinks, smoothies, bowls

Replacement Benefit: Fermentation reduces lactose and may aid tolerance; delivers probiotics.

Why it's not used: Plain nonfat milk has milder flavor and broader culinary versatility; lower cost per protein gram.

Fortified soy milk

Source: Soybeans

Processing Level: Moderate

Common Uses: Beverage, cereals, smoothies

Replacement Benefit: Lactose-free, cholesterol-free; protein comparable to dairy when fortified.

Why it's not used: Dairy flavor, functionality, and consumer familiarity; often preferred taste and mouthfeel.

Citations

21 CFR 131.125 — Nonfat dry milk

2025-07-16

U.S. FDA/ECFR • ECFR (U.S. FDA)

21 CFR Part 131 — Milk and Cream

2025-07-16

U.S. FDA/ECFR • ECFR (U.S. FDA)

Determination of Digestible Indispensable Amino Acid Score of Selected Foods (Skim milk powder >100)

2025-05-14

Oh J., et al. • PubMed

Managing Lactose Intolerance (patient handout)

2024-09-01

UVA GI Nutrition • UVA GI Nutrition

Glycemic Responses of Milk and Plant-Based Drinks

2023-01-10

Shkembi B., Huppertz T. • Nutrients (Open Access Review)

Regulation (EU) No 1169/2011 — Annex II (allergen listing: milk)

2011-11-22

European Parliament and Council • EU Law

Food Allergies (Big 9; sesame added 2023)

2025-03-26

U.S. FDA • FDA

Codex Standard for Milk Powders and Cream Powder (CXS 207-1999)

2014-01-01

Codex Alimentarius Commission • FAO/WHO Codex

Lactose: Characteristics, Food and Drug-Related Applications

2022-05-13

Dominici S., et al. • Nutrients (Open Access)

Cow’s Milk and Milk Alternatives — Infant & Toddler Nutrition

2025-03-20

Centers for Disease Control and Prevention • CDC