1 min read

MARCH 2026

Tired of stomachaches after you eat?

Does it feel like everything you eat upsets your stomach — and you’ve been dealing with this discomfort for years? You’re not alone. Nearly 40,000 Costco employees and their family members deal with gut issues like bloating, cramping and constipation.

Looking for more? Find other articles below

Figure out what’s going on with your gut

Cylinder, your free digestive health program, starts with an at-home gut health test to measure good and bad bacteria. Then experts and registered dietitians help you spot triggers and build a gut-friendly meal plan.

Registered dietitian: One-on-one support for symptom triggers, meal planning, nutrition tips, weight management and overall gut health.

Health coach: Help managing stress, setting goals, navigating health care, making exercise plans, managing medications and making lasting changes.

On-call nurse: On-demand support — anytime, anywhere.

You can also access recipes, self-paced courses, smart food and symptom tracking, and more.

What’s your poop trying to tell you?

Get answers from Cylinder’s new Stool Tracker. How it works:

Snap a photo of your stool and upload it to the app
Get an analysis based on the Bristol Stool Chart
See helpful insights on what’s going on inside you

You can also track meals, symptoms (like bloating and pain), stress levels and other digestive factors in a diary. The app helps build a custom care plan, with support from a coach and registered dietitian to help you identify trigger foods and ease your symptoms.

Gut health is more than just a bellyache

That’s why it’s important to know what’s going on. Your gut is home to trillions of tiny organisms that affect more than just digestion. From immune health to mood and even sleep, your gut plays a big role in how you feel every day.

Immune health — About 70% of your immune system lives in your gut.¹ A healthy gut fights germs and keeps inflammation in check.

Mental health — Your gut and brain are closely connected. Most of your body’s serotonin — the “feel-good chemical” — is made in your gut.

Sleep — Your gut helps produce melatonin, the hormone that controls sleep. When your gut is out of balance, sleep can suffer.²

Get better rest with Sleepio, an online sleep improvement program. And don’t ignore the snore and grogginess no matter how much sleep you get — GEM Sleep (now available through Sleepio) offers at-home sleep tests and treatments for sleep apnea. Available to mainland employees only.

Source(s):  
¹Nutrients. The interplay between the gut microbiome and the immune system in the context of infectious diseases throughout life and the role of nutrition in optimizing treatment strategies 
²Open Life Sciences. Gut microbiota and sleep: Interaction mechanisms and therapeutic processes

1 MIN READ

Tired of stomachaches after you eat?

Figure out what’s going on with your gut

What’s your poop trying to tell you?

Gut health is more than just a bellyache

Resources for you

2 min read

Benefits to help with weight management

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Omada Meal Map — a new way to track what you eat

1 min read

Build meal plans with a registered dietitian

1 MIN READ

Tired of stomachaches after you eat?

Figure out what’s going on with your gut

What’s your poop trying to tell you?

Gut health is more than just a bellyache

Resources for you

Additional well-being articles

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Benefits to help with weight management

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Omada Meal Map — a new way to track what you eat

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Build meal plans with a registered dietitian