We test like lives depend on it

Preview text: Third-party tested, clinically backed

Saturday, Oct 10, 2026 at 6:54 PM EasternKlaviyo

Persephone BiosciencesWe test like lives depend on it

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We test like lives depend on it - email from Persephone Biosciences

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Subject: We test like lives depend on it
Preview text: Third-party tested, clinically backed
From: hello@persephone.bio
Brand: Persephone Biosciences
ESP: Klaviyo
Sent: Sat Oct 10, 2026, 6:54 PM ET
Sent to: dumponcancer.com, persephone.bio
Size: 36 KB
Images: 7
Links: 9, 4 of them buttons
Subject length: 31 characters

Against Persephone Biosciences's usual

Sent in the 6 PM hour, which holds 7% of its emails; 20% arrive in the 11 AM hour. The subject is 31 characters; its average is 32.

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: Persephone Biosciences <[email protected]>
Subject: We test like lives depend on it
Date: Sat, 10 Oct 2026 22:54:37 +0000
Message-ID domain: klaviyomail.com
Return-Path domain: k3.hello.persephone.bio
DKIM signature: d=shared.klaviyomail.com s=def1; d=hello.persephone.bio s=mtd1
List-Unsubscribe: Present, one-click

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from (unnamed) by kmta-mta-blue-….servers.clovesoftware.com with SMTP

Other sending headers (names only): X-Mailer-Info-Extra2, X-Mailer-Info, X-Mailer-Info-Extra, X-Kmail-Account, X-Kmail-Flow, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse

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Sent just before and after

	Oct 11, 2026 8:00 PM	We test like lives depend on it
	Oct 11, 2026 6:55 PM	We studied a lot of 💩
	Oct 10, 2026 7:59 PM	Here’s 30% off to get started
	Oct 10, 2026 6:54 PM	We test like lives depend on it (this email)
	Oct 9, 2026 11:00 PM	90% of babies are missing this
	Oct 9, 2026 6:53 PM	Here’s 30% off to get started
	Oct 9, 2026 10:10 AM	A closer look at the science inside