The Gut Chemical You've Never Heard Of (But Feel Constantly)

Preview text: It's not just about allergies

CleanTuesday, Aug 18, 2026 at 6:30 AM EasternKlaviyo
CleanThe Gut Chemical You've Never Heard Of (But Feel Constantly)
Subject
The Gut Chemical You've Never Heard Of (But Feel Constantly)
Preview text
It's not just about allergies
From
support@cleanprogram.com
Brand
Clean
Sent
Tue Aug 18, 2026, 6:30 AM ET
Size
54 KB
Images
13
Links
16, 3 of them buttons
Subject length
60 characters

Against Clean's usual

Sent in the 6 AM hour, which holds 20% of its emails; 50% arrive in the 7 AM hour. The subject is 60 characters; its average is 38.

Email headers

What the brand's servers put on this email. Our receiving servers, the address we subscribed with and unsubscribe links are left out.

From
Clean <[email protected]>
Subject
The Gut Chemical You've Never Heard Of (But Feel Constantly)
Date
Tue, 18 Aug 2026 10:30:41 +0000 (UTC)
Message-ID domain
geopod-ismtpd-29
Return-Path domain
send.cleanprogram.com
DKIM signature
d=cleanprogram.com s=s1
List-Unsubscribe
Present, one-click

Servers it passed through, newest first

  1. by recvd-…-fxgdz with SMTP
  2. from (unnamed) by geopod-ismtpd-29 with HTTP

Other sending headers (names only): X-Kmail-Account, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse, X-SG-EID, X-SG-ID, X-Entity-ID

Report this email

Sent just before and after

Aug 22, 2026 7:15 AMHow To Build Your “Back To School” Ritual
Aug 21, 2026 6:45 AMEverything Clean Rewards Actually Gives You
Aug 20, 2026 10:18 AMThe Matcha Ritual We Didn't Want To Keep To Ourselves
Aug 18, 2026 6:30 AMThe Gut Chemical You've Never Heard Of (But Feel Constantly) (this email)
Aug 17, 2026 7:02 AMLast Day: 25% Off Bloat Relief Ends Tonight
Aug 16, 2026 7:45 AMThe Real Reason Certain Foods Leave You Bloated
Aug 15, 2026 7:15 AMThe Surprising Secrets of Absorption Timing

More from Clean

All Clean emails

Get the Black Friday insights

We're collecting every Black Friday email from more than 50,000 brands as it lands. Get what we find: who starts first, the biggest discounts, and the subject lines that stand out.

Free. Unsubscribe anytime.