Full cream, Lite or Skim Milk: Which is Healthiest?

What is the difference?

• Full-cream milk: approximately 3–4% fat
• Lite milk: approximately 1–2% fat
• Skim milk: less than 0.5% fat

As the fat content decreases, so does the overall energy and saturated fat content.

However, the protein and calcium content generally remains similar.

Myth #1: “Skim milk is more processed”

Almost all commercial milk sold in stores undergoes some form of processing, primarily pasteurisation (heating milk to destroy harmful microorganisms and extend shelf life) and homogenisation (dispersing fat globules throughout the milk to prevent the cream from separating) (1). In Australia, cow's milk sold for human consumption must undergo pasteurisation.

To produce reduced-fat or skim milk, some or all of the cream is removed through a process called centrifugal separation (1).

While skim milk therefore undergoes an additional fat-separation step, “more processed” doesn't automatically mean nutritionally inferior. From a health perspective, the nutrient composition and how it fits within your overall diet matter more than describing one as “more processed.”

Myth #2: “Skim milk has more sugar”

Removing the fat from milk does not mean sugar is added in its place.

The sugar naturally present in milk is predominantly lactose. Plain full-cream, lite and skim milk generally contain similar amounts of sugar.

Skim milk may sometimes contain slightly more sugar per 100 mL than full-cream milk, but this does not necessarily mean sugar has been added. Removing fat changes the relative proportions of the other components in the milk.

Myth #3: “Full cream milk has more protein and calcium”

Not necessarily.

Protein and calcium levels are generally similar across full-cream, lite and skim milk.

Removing the milk fat does not mean removing most of the protein or calcium.

This means you can still get protein, calcium and other important nutrients from reduced-fat and skim milk.

What About Heart Health?

Research has generally not shown a clear association between full-fat dairy consumption and an increased risk of cardiovascular disease (2). This means we shouldn't simply label full-cream milk as “bad” for your heart.

However, full-cream milk contains more saturated fat than lite or skim milk, and saturated fat can increase LDL cholesterol.

For this reason, the Australian Heart Foundation recommends reduced-fat dairy for people with elevated LDL cholesterol or existing heart disease (3).

For the general population without heart disease, the Heart Foundation states there is currently not enough evidence to recommend full-fat over reduced-fat dairy, or vice versa (3).

So, Which Milk Should you Choose?

There isn't one type of milk that is automatically the “healthiest” choice for everyone.

For the general healthy population, either full-cream or reduced-fat milk can form part of a healthy diet.

For those looking to reduce their overall energy intake, or with elevated LDL cholesterol or heart disease, lite or skim milk may be a better option, as they provide similar amounts of protein and calcium with fewer calories and less saturated fat.

Ultimately, the best choice depends on your individual health needs and your overall dietary pattern.