Dairy vs. Non-Dairy Milk: What’s Better for Your Health?

As plant-based diets rise in popularity and more people explore alternatives to cow’s milk, the debate between dairy and non-dairy milk products is becoming increasingly common. 

But which is better for you? The answer isn’t one-size-fits-all. It depends on your nutritional needs, lifestyle, and any dietary restrictions. 

In this blog post, we’ll compare the nutritional profiles of dairy and non-dairy milks to help you make an informed choice.

Dairy Milk: Nutritional Overview

Cow’s milk is a natural source of several key nutrients:

Protein: About 8g per cup, containing all essential amino acids.

Calcium: Naturally rich, providing about 300mg per cup.

Vitamin D: Usually fortified in the UK to help with calcium absorption.

Vitamin B12: Important for energy and nerve health.

Iodine: A critical nutrient for thyroid function.

Pros:

High-quality, complete protein.

Nutritionally dense, especially in essential vitamins and minerals.

Beneficial for bone health due to calcium and vitamin D.

Cons:

Not suitable for those with lactose intolerance or a dairy allergy.

Higher in saturated fat (especially whole milk).

Ethical and environmental concerns around dairy farming.

Non-Dairy Milk: Nutritional Overview

Plant-based milk alternatives include soya, almond, oat, coconut, rice, pea, and more. Their nutritional value can vary dramatically depending on the type and whether they’re fortified.

Soya Milk

Closest in protein to dairy (7–8g per cup).

Often fortified with calcium, vitamin D, B12.

Low in saturated fat.

Almond Milk

Very low in calories and protein.

Often fortified but contains fewer nutrients than dairy or soya milk.

Oat Milk

Moderate in calories and carbohydrates.

Some brands are fortified; offers some fibre.

Creamier texture, good for coffee or cooking.

Coconut Milk (Carton-style)

Low in protein.

Contains some medium-chain triglycerides (MCTs), but also high in saturated fat.

Pea Milk

Higher in protein (6–8g per cup).

Environmentally friendly and hypoallergenic.

Pros:

Suitable for vegans and those with dairy allergies or intolerances.

Lower in saturated fat.

Often fortified with key vitamins and minerals.

Cons:

Not all brands are fortified equally — always check the label.

Lower in protein, unless you choose soya or pea milk.

Can be more processed and contain additives like gums or sweeteners. Some brands of pea milk actually taste a little like weak pea soup.

Which Is Better?

It depends on what you need:

For protein: Dairy, soya, or pea milk are best.

For bone health: Choose dairy or a well-fortified plant milk.

For weight management: Almond or unsweetened plant milks may help due to lower calories.

For allergies or ethical reasons: Fortified plant milks are a good dairy-free alternative.

For sustainability: Oat and pea milk generally have a lower environmental footprint than dairy.

Bottom Line

There’s no universal “best” milk, just what’s best for you. If you’re drinking milk for its nutritional benefits, opt for unsweetened versions and check for fortification. Whether you prefer dairy or a plant-based option, the key is making sure it supports your dietary needs and lifestyle.

Tip: Always read the label. Look for added calcium (at least 120mg per 100ml), B12, vitamin D, and no added sugars for the healthiest choices.