In-Stock Diets

Our in-stock custom diets provide a clean, open formula background in which to make modifications.

DIO Series Diets

Research Diets, Inc. is well known as the gold standard in high-fat diets for diet-induced obesity research worldwide.

Control Diets

When choosing a control diet, one should ask three questions: Can I report it?, Can I repeat it?, Can I revise it?

Custom Diets

Making custom diets is our business. We have created over 25,000 "Original" formulas.

Add Your Compounds to Diet

Research Diets will incorporate your compounds into any experimental diet and ship within 5 to 7 days.

Vitamin & Mineral Deficient Diets

Create vitamin and mineral deficiencies which allows researchers to define the requirements of these nutrients.

How To Order

Contact us and start the conversation with one of our scientists.


In our effort to provide local service in some areas we have certified distributors.

Verify Your Diet

Verify your product is a genuine OpenSource Diet from Research Diets, Inc.

Ready to speak with a scientist?

Mike 0923

Michael A. Pellizzon, Ph.D.

Science Director
Sara 1045

Sara Sturgess, M.S., R.D.N.

Project Manager and Scientist
Holly 0947

Jia-Yu (Holly) Ke, Ph.D.

Senior Scientist