• Alyssa Fontaine, RD
• Feb 22, 2026

When Can Baby Have Whole Milk?

Cow’s milk can be very beneficial for infants, but you may wonder, when is it safe to start?

Milk is a great source of calories, fat, protein, calcium, and vitamin D. However, as pediatric dietitians, we will discuss why cow’s milk is not recommended before 12 months, and how it becomes an important source of nutrition after the age of 1.

Why Whole Milk Matters After Age 1

Below are some of the reasons we say milk plays an important role in your infant’s nutrition:

• Brain and eyes: Whole milk provides essential fats that help your infant’s eyes and brain develop.
• Bone growth: It is a huge source of calcium and vitamin D, both important for bone development at a young age.
• Milk helps bridge nutritional gaps as children transition from breastmilk or formula to solid foods.

As much as milk is a great source of nutrition, too much of it can also cause your infant to have less appetite and crowd out other important foods.

When Can You Start Whole Milk?

Cow’s milk can become your baby’s main drink after their first birthday, before that, breast milk or iron-fortified formula should be your baby’s milk source.

Even though milk should be introduced after 12 months, you can introduce dairy before, as a solid, with foods like yogurt and cheese. Remember that every child is unique, so the transition to milk and introduction of dairy may look different for everyone.

How Much Milk Should a 1-Year-Old Drink?

Okay, so your infant is ready to begin transitioning to milk. Your next question is likely how much milk should you give? 

For infants between the ages of 12 to 24 months, 500 ml of homogenized (3.25%) milk per day is recommended. If your baby happens to really enjoy it, you should limit milk to a maximum of 750 ml. This is to ensure they maintain their appetite for other foods and avoid increasing the risk of iron-deficiency anemia.

Keep in mind that milk should always be used as a complement to your infant’s meals, not replace them.

Tips for Transitioning to Whole Milk

1. Start by slowly mixing whole milk with breast milk or formula
2. Offer milk in a cup instead of a bottle to help with the oral development of your baby.
3. Serve milk with meals instead of throughout the day to protect their appetite
4. Offer a variety of solid foods with the milk

Alternatives to Whole Cow’s Milk

Whether it is by allergy, tolerance or preference, you may opt to avoid cow’s milk, and there are many alternatives in the market that make this possible. That said, it’s important to consider that not all plant milks are made equal.

• Fortified soy milk is the best alternative and the closest in nutrition to cow’s milk.
• Other alternatives, such as almond or cashew plant milks, are usually lower in protein and fat unless they are fortified.

If you are considering switching to an alternative milk due to medical or allergy-related concerns, you should discuss this with a healthcare professional, such as our pediatric dietitians. It is crucial to ensure your baby’s health and safety. 

When to Talk to a Doctor

You should consider reaching out to a pediatrician or pediatric nutritionist if:

• Your child is refusing milk completely
• Any sign of dairy allergy or intolerance
• Growth or weight gain becomes a concern
• Your baby drinks excessive or very little milk

The Bottom Line

After the first birthday, milk or milk alternatives become an essential part of your baby’s diet by providing healthy fats, protein and calories. That said, it is not the star of the show, and it should accompany other foods.
Connect with one of our pediatric dietitians today, they will ensure you and your baby get everything you need to thrive.