Skip to content

What a gastroenterologist wants you to eat more of

Hint: it's not about hitting a number

Levels <[email protected]>

Newsletters

Share
Sent with SendGrid Sends about 3 a week All facts

Levels promotes a healthier gut through plant-based eating, highlighting the expertise of gastroenterologist Dr. Will Bulsiewicz. The campaign shares five key takeaways for building a better gut, including aiming for variety and increasing fiber intake. It also invites readers to explore additional strategies and metabolic health resources.

What the raw message shows

From the headers

Sent with
SendGrid See it in the headers

Across Levels's email

Sends
About 3 a week
DMARC
Enforced, reject

Mail failing authentication is refused.

The copy

358 words · about 2 min to read · 2 buttons

What a gastroenterologist wants you to eat more of

How to build a better gut, one plant at a time

Most of us only think about our gut when something goes wrong. But the trillions of microbes living in your digestive tract are quietly shaping far more than digestion, from how your immune system behaves to how your body handles blood sugar. Gastroenterologist Dr. Will Bulsiewicz, author of Fiber Fueled, came to this work the hard way. Early in his career he was overweight, anxious, and dealing with high blood pressure, and changing how he ate turned it around. On A Whole New Level, he explained how the gut works and what actually helps.

Button Build a better gut →

Five Key Takeaways

1. Aim for variety over volume.

A diverse community of microbes is a hallmark of a healthy gut, and the way to build it is eating many different plants. Dr. Bulsiewicz suggests working toward 30 different plants a week, and herbs, spices, nuts, seeds, and legumes all count.

2. Fiber is food for your microbes.

Most Americans don't get enough of it. When gut bacteria break fiber down, they produce short-chain fatty acids like butyrate that help maintain the gut lining and calm inflammation.

3. Your bathroom habits are free data.

Chronic bloating is the classic sign of an unhappy microbiome, and the goal is a soft, formed stool that passes without straining. Blood in your stool or unexplained weight loss, though, means see a doctor promptly.

4. Build up low and slow.

Jumping from 10 grams of fiber a day to 50 is a recipe for discomfort. Smoothies, soups, and sauces make it easy to fit several plants into one dish while your gut adjusts.

5. Your gut responds fast, in both directions.

Your microbiome can start shifting within about a day of changing what you eat, but the benefits fade just as quickly if old habits return. Consistency matters more than intensity.

Button Read all six strategies →

Looking to understand more about your metabolic health?

Explore our health news and advice site, Metabolic Insights

228 Park Ave South, PMB 63877, New York, NY 10003

The words as text: what a screen reader can follow, and all there is when images don't load.

What the headers say

Read from the message's own headers, as it arrived.

Came from
o33.sg.m.dripemail2.com · 168.245.99.76

SendGrid's sending servers

SPF
Pass for drip.levels.com
DKIM
  • Pass signed by levels.com
DMARC
Pass for levels.com

Policy: reject

Unsubscribe
One-click

Meets the Gmail and Yahoo rule for bulk senders.

Complaints
No feedback-loop header
Show all 17 headers

As received, minus the delivery side: the archive's own addresses show as [recipient], its mail servers as [receiver], signatures are left out and unsubscribe links trimmed to their host.

Route

Received
from o33.sg.m.dripemail2.com (168.245.99.76) by [receiver] (cloudflare) id 06BJbizrUfoM for <[recipient]>; Tue, 27 Oct 2026 16:00:12 +0000
Received
by recvd-78c576fc64-95sxj with SMTP id recvd-78c576fc64-95sxj-1-6AE0C368-55 2026-10-27 15:29:44.693521867 +0000 UTC m=+2413753.554858451
Received
from MTMxMTA3NDc (unknown) by geopod-ismtpd-11 (SG) with HTTP id sZsTfJ_GRC-aBviWl5YQxw Tue, 27 Oct 2026 15:29:44.658 +0000 (UTC)

Authentication

Received-SPF Authentication result
pass ([receiver]: domain of [recipient]@drip.levels.com designates 168.245.99.76 as permitted sender) receiver=[receiver]; client-ip=168.245.99.76; envelope-from="[recipient]@drip.levels.com"; helo=o33.sg.m.dripemail2.com;
Authentication-Results Authentication result
[receiver]; dkim=pass header.d=levels.com header.s=s1 header.b=cNbtnbnK; dmarc=pass header.from=levels.com policy.dmarc=reject; spf=none ([receiver]: no SPF records found for [email protected]) smtp.helo=o33.sg.m.dripemail2.com; spf=pass ([receiver]: domain of [recipient]@drip.levels.com designates 168.245.99.76 as permitted sender) smtp.mailfrom=[recipient]@drip.levels.com; arc=none smtp.remote-ip=168.245.99.76

Platform

X-Drip-SendingAccount
4080355
X-SG-EID Identifies SendGrid
u001.79kJZC85z/WE9t9nOmpiHosf7qU1Au+mrKy3jytIn8sMbSWRTgBdv9q1OykY6JKWwPPP71fhoryhmiOfoyMqLUhDbobCA9Pj1+njx7y6vUTjUJOOsuRZBPHGnwGN8KLFLP87BfiQ+/m5qv0Z2pl4qM5xJ+jQnk4CM1RYvORX/oRs1uWD+gSmLjHJV/7F0i79IIBVOm52GW7wze8AeFXFowvpBexJRW712IrI1gxUsO4=
X-SG-ID Identifies SendGrid
u001.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
X-Entity-ID
u001.dEl2Z4sQ4dqI57TjhSSBBA==

Unsubscribe and feedback

List-Unsubscribe
<mailto:…@unsubscribe.dripemail3.com>, <https://unsubscribe.dripemail3.com/…>
List-Unsubscribe-Post
List-Unsubscribe=One-Click

Message

Content-Type
multipart/alternative; boundary=c3dd066ecbe22bfd67a4f8530522783e613fbb0b16143ffcfaca153e3bb2
Date
Tue, 27 Oct 2026 16:00:00 +0000 (UTC)
From
Levels <[email protected]>
Mime-Version
1.0
Message-ID
<sZsTfJ_GRC-aBviWl5YQxw@geopod-ismtpd-11>
Subject
What a gastroenterologist wants you to eat more of

More from Levels

All 28 emails
Levels

Eat This Instead: Healthier Pasta

Levels

Beyond the vagus nerve hype

Levels

The Marker You're Missing: RDW

Levels

How to decide which health advice to trust? 

Similar campaigns from other brands

Different brands running the same play. Compare any of them side by side.

Pendulum Life

1 month makes a habit. 3 months makes a difference

Compare
TheFeed.

Let’s get your gut in check

Compare
Seed

Multiply your good gut bacteria.

Compare
Arnold's Pump Club

this really bothered me

Compare

Archived for reference and commentary. Levels, its logos and content are the property of their respective owners; Inbox Archive claims no affiliation and has disabled all links. If you own this content and would like it removed, get in touch.