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Privacy Policy

This policy explains what MuscleOnGLP collects, why, and what choices you have. MuscleOnGLP is published by Purplelink LLC. Questions: ben@purplelink.llc.

1. The short version

We do not use cookies for our own analytics, we do not sell your personal information, and we do not build advertising profiles ourselves. We collect the minimum needed to run the site, deliver what you buy, and understand roughly how many people visit. Third-party advertising, described in section 5, does use cookies, and you can opt out of it.

2. Analytics: first-party and cookieless

We run our own analytics rather than embedding a third-party tracker. For each page view we record the page path, the type of event, the referring website's host name (the host only, never the full URL or its query string), and a utm_source value if one is present in the link you arrived from.

To count unique visits without identifying you, we compute a one-way SHA-256 hash of your IP address combined with a daily-rotating value. We store only that truncated hash. We do not store your raw IP address, the hash cannot be reversed, and because the value rotates every day it cannot be used to link your visits across days. We do not use cookies, local storage, or device fingerprinting for analytics.

We honour Do Not Track. If your browser sends a Do Not Track signal, no analytics event is sent or recorded.

3. Purchases

If you buy a guide, we process your email address and a record of your agreement to our Terms, including the time and version accepted, so that we can deliver your download and meet our legal obligations. Payment card details are collected and processed by Stripe under its own terms and privacy policy. We never see or store your full card number.

4. Email list

If you join our email list or the app waitlist, your email address is stored with Buttondown, our email provider, and used to send the research digest and related updates. Every email includes an unsubscribe link, and you can unsubscribe at any time. We do not sell or rent our list.

5. Cookies and third-party advertising

Some pages on this site carry display advertising served by Google, including through Google AdSense.

Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this and other websites.
Google's use of advertising cookies enables it and its partners to serve ads to you based on your visit to this site and other sites on the internet.
You can opt out of personalised advertising by visiting Google Ads Settings.
You can opt out of some third-party vendors' use of cookies for personalised advertising at aboutads.info, or, in Europe, at youronlinechoices.eu.
Google's handling of data in its advertising products is described at policies.google.com/technologies/partner-sites.

You can also block or delete cookies in your browser settings. Doing so does not affect your ability to read this site or use our calculators, which run entirely in your browser.

6. Affiliate links

A small number of pages link to products on Amazon. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. If you follow such a link, Amazon may set its own cookies and will handle your data under its own privacy policy. We do not receive your Amazon account details.

7. Our calculators

The figures you enter into our calculators (weight, age, medication, training habits, and similar) are processed in your browser to produce a result. We do not transmit or store the values you enter.

8. The GLP-1 muscle survey

If you choose to take part in our survey, we record only your answers, which are fixed multiple-choice options. There is no free-text field anywhere in it, so nothing you type can reach us. We do not ask for, and do not store, your name, email address, or any other identifying detail, and survey answers are never joined to your email address if you happen to be on our list.

As with our analytics, we do not store your IP address. We keep a one-way, daily-rotating hash of it for one purpose only: to stop a single person submitting repeatedly. It cannot be reversed and cannot be linked across days. Results are published only in aggregate, with the sample size, the collection dates, and the limitations stated.

9. Hosting and service providers

The site is hosted by Netlify, which processes standard server request data in order to deliver pages and to protect the service. Our analytics records are stored using Netlify's storage. Our processors are Netlify (hosting and storage), Stripe (payments), Buttondown (email), and Google (advertising).

10. How long we keep things

Aggregated analytics records are retained to understand traffic trends over time and contain no directly identifying data. Order records, including the email address and the record of your acceptance of the Terms, are kept as long as needed for support, refunds, tax, and legal purposes. Email subscribers are kept until you unsubscribe.

11. Your choices and rights

You can unsubscribe from emails at any time, opt out of personalised advertising using the links in section 5, and send a Do Not Track signal from your browser to stop analytics collection entirely. Depending on where you live, you may have the right to request access to, correction of, or deletion of the personal data we hold about you. Email ben@purplelink.llc and we will respond. We do not sell personal information.

12. Children

This site is intended for adults. It is not directed at children under 13, and we do not knowingly collect personal information from them. If you believe a child has provided us with personal information, email us and we will delete it.

13. Changes to this policy

We may update this policy as the site changes. Material changes will be reflected here, and the practices described above apply from the date of publication.

14. Contact

Purplelink LLC, publisher of MuscleOnGLP. Email ben@purplelink.llc. See also our Terms of Service, editorial policy, and contact page.