If you experience bloating, discomfort, or trouble sleeping after consuming dairy, the issue might not be lactose — it could be the type of protein in your milk.

Most supermarket milk comes from cows that produce A1 β-casein. But a growing body of research suggests that A2 β-casein, found in deer milk and a few other species, may be a better fit for the human body. It’s easier to digest, less inflammatory, and could even support a more restful night’s sleep.

Let’s explore why A2 protein in deer milk is gaining attention as a natural, gut-friendly, sleep-supporting alternative.

What Is A2 Protein?

Milk is made up of water, fats, lactose, and proteins — with casein being the most dominant protein group.

Within casein, there are different subtypes, and one of the most important is β-casein (beta-casein). This exists in two main forms:

• A1 β-casein — Found in most cow’s milk 

• A2 β-casein — Found in goat, sheep, human, and deer milk

The difference between A1 and A2 is just a single amino acid, but that tiny change affects how your body breaks it down.

A1 vs A2: The Digestion Difference

When A1 protein is digested, it can produce a peptide called BCM-7 (beta-casomorphin-7). Research has linked BCM-7 to a range of digestive and neurological issues in sensitive individuals, including:

• Bloating or cramping

• Sluggish gut motility

• Disrupted mood or sleep

• Inflammation in the gut lining

In contrast, A2 protein doesn’t produce BCM-7, making it potentially easier to digest and better suited to people with dairy sensitivity (especially those who test negative for lactose intolerance).

Deer Milk: A Natural A2 Source

Unlike cow’s milk, deer milk contains only A2 β-casein. This makes it naturally free from the digestive effects associated with A1 milk.

In addition to its A2 profile, deer milk is:

• High in protein (more than cow or goat milk)

• Rich in bioactive peptides that support digestion and immune health

• Low in αs1-casein, another protein that can trigger dairy sensitivities

Its unique composition may support the gut and nervous system in ways conventional milk can’t.

What Does This Mean for Sleep?

Your digestive system and nervous system are closely linked — especially at bedtime. Disrupted digestion, inflammation, or discomfort can impact sleep quality.

Because deer milk contains sleep-supportive nutrients like:

• Naturally occurring tryptophan (used to make melatonin)

• Magnesium (for muscle and nerve relaxation)

• Peptides that may lower stress signals like cortisol

... it becomes more than just a dairy alternative. It becomes a natural sleep aid.

DoeZ™: The World's First Deer Milk Sleep Supplement

DoeZ™ uses 100% pure New Zealand deer milk — and nothing else. Its natural A2 β-casein profile, combined with calming nutrients, makes it a gentle, natural supplement designed to:

• Support healthy digestion

• Promote nervous system calm

• Help your body ease into deeper, more restful sleep

For those with dairy sensitivity, stress-related sleep problems, or nighttime restlessness, DoeZ is a uniquely nourishing solution.