Maya Reyes Gut Health Researcher

USA Gut Check · 20 seconds

Bloated after your protein shake?

You're not lactose intolerant. And it's not "just whey."

Swollen belly Gas Brain fog

Real talk

It's not the whey.
It's the chug.

Most guys slam 40–50g of protein in under 60 seconds — often on an empty stomach, right after a workout.

Your gut has zero time to prepare. It can only digest about 10g of protein per hour. The rest sits there and ferments.

What's actually happening

3 things wreck your gut post-workout

• 1Blood is in your muscles — not your gut. Digestion is paused.
• 2Cold shakes constrict the stomach and slow emptying
• 3Sugar alcohols (sucralose, maltitol) ferment fast and hard

Try this week

The 15-minute test.

Same shake. Same powder. But this time, sip it over 15 minutes — not 60 seconds.

No bloat? Your gut was never the problem. Your speed was.

The fix

7 days · not 7 months

Rebuild the gut wall first.

Even clean protein can wreck a damaged gut lining. Seal it, then rebuild tolerance.

+9k

12,400+ US readers helped

Maya Reyes Gut health research · 8 years Fact-checked & sourced

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Results vary. Not medical advice.

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