The Ultimate Oat Milk Sourcing Guide: From Source to Flavor, Everything You Need to Know

Whether you’re sourcing for hotels, coffee chains, or retail shelves, this definitive guide delivers everything buyers need to select oat milk products that delight your customers. Let’s dive in.

How Oat Milk Is Made

Key Ingredients

• Oats (Avena sativa)

  • Choose whole grains or oatmeal to retain more natural nutrients

  • Some brands use pre-processed oat extracts for efficiency

• Water

  • Forms the base - amount affects thickness

• Plant Oils

  • Sunflower or rapeseed oil is often used to add a smooth texture

• Other Additives

  • Salt: Balances sweetness

  • Vitamins/Minerals: Often added calcium, vitamin D, or B12

  • Natural flavors: Vanilla, cocoa, etc.

The Making Process

1. Preparation the Oat

Oats are cleaned, steamed, and rolled into flakes.

2. Milling

The oats are mixed with water to create a smooth slurry, which is then strained to remove any pulp.

3. Enzymatic Breakdown

Enzymes convert the oats’ starches into natural sugars, with heat enhancing this process and improving the texture.

4. Separation

Bran is removed for a smoother texture while keeping the healthy beta-glucan fiber.

5. Adding Ingredients

Oils, vitamins, and minerals are incorporated to enhance flavor and nutritional value.

6. Heat Treatment

The oat milk undergoes heat treatment (pasteurization or ultra-heat treatment UHT) to extend its shelf life.

7. Homogenization

High pressure is used to break down fat globules of varying sizes into uniformly small particles, allowing the fat to disperse evenly in water. This enhances the stability of the beverage and prevents oil-water separation.

8. Packaging and Storage

The finished oat milk is packaged for distribution and storage.

Oat's Superpower

• Heart Health

  • 3 grams of beta-glucan (a soluble fiber in oats)  daily lowers cholesterol by ~12 points.

  • High whole-grain intake (especially oats and rye) reduces heart attack risk by 25-27%.

• Diabetes Management

  • Oats lower fasting blood sugar, hemoglobin A1c, and post-meal spikes in type 2 diabetes.

  • Eating 50-100 grams of whole grain oats daily reduces blood sugar and supports modest weight loss.

• Weight Control

  • Beta-glucan increases food volume, slows digestion, and prolongs fullness.

  • Fermentation of beta-glucan helps regulate hunger hormones.

• Digestive Health

  • Oat fiber eases constipation by increasing stool weight and water content.

  • Beta-glucan fermentation boosts gut bacteria diversity.

Some Oat Milks Available On the Market

Cow’s Milk vs Oat Milk - Dietary Scenarios

Cow’s milk and oat milk each provide unique nutritional benefits and are suited to different dietary needs and preferences. There is no absolute “better” choice—selection should be based on individual health goals, dietary restrictions, and lifestyle considerations.

• Best for Protein

A cup serving of whole cow milk provides 8 g of high-quality protein with all of the essential amino acids (60% of the Recommended Daily Allowance for toddlers, and 40% of the RDA for young children).

• Best for Lower Fat and Vegan Diets

Oat milk is generally lower in fat and suitable for vegans and those who are lactose intolerant.

• Best for Cholesterol

Oat milk is naturally cholesterol-free.

• Best for Low Sugar

Some oat milk varieties have lower sugar content than cow’s milk. To minimize sugar intake, select unsweetened options whenever possible.

• Best for Other Essential Nutrients

Cow’s milk naturally provides nutrients such as riboflavin, pantothenic acid, niacin, zinc, iodine, selenium, and potassium, whereas oat milk typically requires fortification to match these levels.

Choose Cow’s Milk If...

• You require complete protein (e.g. athletes, growing children)

• You prefer natural sources of calcium and vitamins (without fortification)

• You do not have lactose intolerance or dairy allergies

Choose Oat Milk If...

• You avoid lactose or follow a vegan diet

• You seek soluble fiber (β-glucan) for heart health

• You prioritize environmental considerations

For the full story about oat milk...

Please read or download the digital version of the GO Natural Food Guide - Issue 11.

https://gonatural-food.hflip.co/FG11A