Why your supplementation hasn't 'kicked in' yet.
Preview text: The honest timeline for collagen, vitamin D, magnesium & more.

Using this email in an article? Credit: Proto-col email via They Sent It, with a link to this page. Full-size image
- Subject
- Why your supplementation hasn't 'kicked in' yet.
- Preview text
- The honest timeline for collagen, vitamin D, magnesium & more.
- From
- hello@
proto-col.com - Brand
- Proto-col
- ESP
- Klaviyo
- Sent
- Wed Sep 16, 2026, 5:30 AM ET
- Sent to
- United Kingdom (proto-col.co.uk), proto-col.com
- Size
- 75 KB
- Images
- 14
- Links
- 21, 5 of them buttons
- Subject length
- 48 characters
Against Proto-col's usual
Sent in its busiest hour, 5 AM, which holds 43% of its emails. The subject is 48 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
- Proto-col <[email protected]>
- Subject
- Why your supplementation hasn't 'kicked in' yet.
- Date
- Wed, 16 Sep 2026 09:30:30 +0000 (UTC)
- Message-ID domain
- geopod-ismtpd-33
- Return-Path domain
- engage.proto-col.com
- DKIM signature
- d=proto-col.com s=kl2
- List-Unsubscribe
- Present, one-click
Servers it passed through, newest first
- by recvd-canary-…-tmnf5 with SMTP
- from (unnamed) by geopod-ismtpd-33 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
Sent just before and after
| Sep 24, 2026 5:30 AM | Daily turmeric, with a little more behind it 🫚 | |
| Sep 21, 2026 5:00 AM | Offer of the week! | |
| Sep 17, 2026 5:30 AM | Over 6,700 5 Star Reviews on & counting | |
| Sep 16, 2026 5:30 AM | Why your supplementation hasn't 'kicked in' yet. (this email) | |
| Sep 13, 2026 12:30 PM | Save on 3 months of glowing skin & smoother joints | |
| Sep 8, 2026 5:30 AM | On GLP-1? Make every bite count. | |
| Sep 2, 2026 4:02 AM | Last chance: 40% off our birthday sale |
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