Study Explores Whether Whey Protein Before Meals Can Reduce Glucose Spikes

Review Summary

A review published in Nutrients examined 57 randomized controlled trials on dairy products and glucose regulation in adults with type 2 diabetes or prediabetes. Overall, increasing regular dairy consumption had inconsistent or neutral effects on long-term blood sugar control.

Findings

Whey protein showed more promising results for reducing post-meal glucose spikes:

• In one small study, taking 50 grams of whey protein 30 minutes before breakfast reduced post-meal glucose levels by 28% compared with water. It also increased insulin and GLP-1 responses.
• A separate 12-week study found lower HbA1c with a whey-enriched breakfast than with breakfasts containing other protein or carbohydrate sources.

Some fortified or fermented dairy products also showed possible benefits, but findings were mixed.

Limitations and Considerations

The review’s conclusions are limited by small participant groups and short study durations. Whey protein and certain dairy products may be considered alongside diabetes dietary management, but they should not replace medical treatment or individualized dietary advice.

Presenter: Manshika Mishra