Reader Q&A
Submit a question, a claim you've spotted, or a personal training scenario. Strong Qs become full guides on /guides/ — credited or anonymous, your call.
[email protected] →Talk to the team behind every casein claim.
Press, partnerships, expert sources, and reader questions — we read every message and route it to the editor, dietitian, or lab reviewer best placed to answer. Most replies land within two business days.
Send a message
Tell us what you're working on.
Pick the lane that fits — reader Q&A, brand or press inquiry, or a correction request. Drop in the details and we'll route it to the right desk. This is a non-functional preview; submissions are not actually sent from this page.
Reach the right desk
Four inboxes, one editorial standard.
Every message is read by a human and routed to the desk with the most context. Pick the lane that fits — or use the form above and we'll forward it for you.
Brand & PR
Launching a new casein-forward product, ingredient, or clinical study? Send a one-pager, COA, and timing. We respond to pitches within five business days and disclose every sample we receive.
[email protected] →Press desk
Journalists on tight deadlines get priority routing. We can provide expert commentary, brand-agnostic trend data, and high-resolution logos for reprint within the hour during business hours.
[email protected] →Expert sources
Registered dietitians, sports scientists, and ingredient chemists — pitch us as a source. We match you to upcoming reviews and Q&A pieces in your specialty area.
[email protected] →Corrections
Spotted a misquote, an outdated study reference, or a misread label? Send the URL, the passage, and a source. Verified corrections are published with a dated note at the top of the page.
[email protected] →Newsletter support
Manage your subscription, fix a delivery issue, or request a topic for the weekly digest. Include the email tied to your subscription and the issue date if relevant.
[email protected] →How we handle it
From your inbox to a published guide.
A reader question isn't a support ticket — it's editorial input. Here's the path a good question takes from the form to a published answer, with the steps we won't skip.
01
Triage within 36 hours
An editor reads every message, tags the topic, and forwards it to the dietitian, lab reviewer, or contributor with the closest context. No auto-responders.
02
Pull the primary sources
We reopen the original study, COA, or label. If the claim doesn't hold up under current evidence, we tell you — and we tell you what does.
03
Reply, then publish
You get a direct answer first. If the question is wide-reaching, it gets turned into a guide, reviewed by our medical advisory board, and published with a permanent URL.
04
Cite, update, disclose
Every answer links the studies it leans on. When new evidence lands, we revisit the page, log a dated change, and notify readers who opted in.
Before you write
Quick answers to the questions we get most.
If your question is here, the form will still work — but this saves you a round-trip.
Do you accept free products from brands?
Sometimes. When we do, we disclose it at the top of the review, in the spec table, and in any video we publish. We also purchase the same product anonymously at retail whenever funding allows, and we test samples against an internal reference standard before reviewing. If a brand requires editorial approval before publication, we decline the assignment.
Can I write a guest post for 100 Casein?
Yes, if you hold a relevant credential (RDN, PhD in exercise science or biochemistry, or equivalent clinical experience) and your piece goes through the same evidence review as staff work. Send a 200-word pitch and a sample citation style to [email protected]. We don't pay for op-eds and we don't run undisclosed sponsored content.
How do I ask about a specific product I bought?
Use the reader Q&A tab and include the product name, lot number, the claim on the label, and what you noticed. If the label is misleading or the lot was recalled, we escalate to our corrections desk the same day. Check /products/ first — we may have already reviewed it.
Will you sign an NDA before I share proprietary data?
Yes. Our legal lead can turn a mutual NDA around in 48 hours for clinical data, draft COAs, or unpublished trial results. Emailed NDAs aren't accepted — we use a counter-signed DocuSign envelope. Reach [email protected] to start the request.
I noticed an error on a page. How fast do you fix it?
Factually wrong claims, broken citations, and misattributed quotes are corrected within 24 hours of verification, with a dated correction note pinned to the top of the page. Stylistic and opinion disagreements are answered by email but don't trigger a correction banner. Email [email protected] with the URL and paragraph.
Still circling?
Or skip the inbox and read what we're publishing this week.
The latest reviews, reader questions, and lab notes live on the front page and in the product index. Pick the one that fits the question you're trying to answer.