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Katie Marks-Cogan, MD

Board Certified Pediatric & Adult Allergist

Dr. Katie Marks-Cogan is a board certified Pediatric & Adult Allergist at Clear Allergy based in Los Angeles, California. She is the Chief Allergist for Ready, Set, Food!, an infant dietary supplement designed to reduce the risk of childhood food allergies. She received her M.D. with honors from the University of Maryland. She then completed her residency in Internal Medicine at Northwestern University and fellowship in Allergy/Immunology at the University of Pennsylvania and CHOP.

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Co-authored Articles (9)

How to

Differentiate Between a Gluten Allergy and Lactose Intolerance

Gluten sensitivity and lactose intolerance have very similar symptoms, but there are ways to find out if one of these is affecting you. Our guide will show you how changing your diet can help you narrow down the issue an...

How to

Treat an Allergic Reaction on Your Face

Allergic reactions can occur anywhere on your body, but reactions on your face are often the most noticeable and uncomfortable. Whether you develop hives, minor swelling, dry skin, or other mild symptoms, there are a ran...

How to

Treat Allergies

Allergies range from being a nuisance to dangerous medical emergencies. They occur when your body produces antibodies to fight substances that aren’t actually dangerous to you (like cat dander or dust mites). This over...

How to

Test for Gluten Intolerance

If you've been struggling with underlying medical problems, your doctor may recommend that you be tested for gluten intolerance. There's a spectrum of gluten-related conditions that can affect your body. One is Celiac di...

How to

Deal With Allergic Reactions

Allergies range from mild seasonal ones to severe ones that cause life-threatening reactions. People can have allergic reactions to a number of things, including various foods, drugs, and allergy shots. Milk, eggs, wheat...

How to

What are the most common food allergies?

While the variety of foods people can be allergic to is vast, some food allergies are more common than others across the globe. In this video, Allergist Dr. Katie Marks-Cogan outlines the eight food groups that make up 9...

How to

Are you born with food allergies or can you develop them over your lifetime?

Children and adults can be allergic to all kinds of different foods, but where do those allergies come from? Are you born with food allergies, or can you develop them later in life? In this video, allergist Katie Marks-C...

How to

What is a food allergy and why do they happen?

A food allergy occurs when our immune system overreacts to a certain protein in a specific food and treats it like an invader. In response, our bodies create allergy antibodies to help attack the invader protein, which c...

How to

How do you diagnose and treat a food allergy?

Diagnosing a food allergy is best done by visiting a board-certified allergist. In this video, Dr. Katie Marks-Cogan outlines the three methods allergists use to diagnose a potential food allergy in a patient, using mult...