Our cookies.

We use as few cookies as possible. This page lists every one we set or allow, why, and how to turn them off.

What is a cookie?

A cookie is a small text file stored in your browser. Cookies can be set by the site you visit (first-party) or by third-party services embedded in that site. This page covers both categories as they apply to Biohacker Atlas.

Cookies we set ourselves (first-party)

Consent preference — ba-consent

Storage: localStorage (not an HTTP cookie, but stored in your browser).
Value: granted or denied.
Purpose: Remembers whether you accepted or rejected analytics on the consent banner so we don't ask on every page load. This value never leaves your device — it is read only by our consent script and is not sent to any server.
Legal basis: Strictly necessary for the operation of the consent mechanism. No opt-out is required; you can clear it at any time by clearing your browser's site data for biohackeratlas.com.

Analytics cookies (third-party, consent-gated)

The following cookies are set by Google Analytics 4 (GA4, measurement ID G-SDHF9ZRP8T) and are only placed if you accept analytics via our consent banner. If you are visiting from the EU, EEA, UK, or Switzerland they are denied by default under Google Consent Mode v2 — no analytics cookies are written until you explicitly accept.

_ga

Provider: Google Analytics 4.
Purpose: Distinguishes unique visitors. Contains a randomly generated client ID used to aggregate your sessions.
Duration: 2 years from last activity.
Legal basis: Your consent — Art. 6(1)(a) GDPR.

_ga_SDHF9ZRP8T (and _ga_* variants)

Provider: Google Analytics 4.
Purpose: Maintains session state for the GA4 property tied to this site. Used together with _ga to track session duration and page sequences.
Duration: 2 years from last activity.
Legal basis: Your consent — Art. 6(1)(a) GDPR.

Affiliate-network cookies (third-party, set on click)

When you click an affiliate link on Biohacker Atlas (all routed through /go/ paths, marked rel="sponsored nofollow"), you are redirected to a retailer or brand website. That destination site or its affiliate network may set cookies to attribute your visit for commission purposes. These cookies are governed by those third parties' own privacy and cookie policies — not ours.

The affiliate networks we work with, and the cookies they may set, include:

Amazon Associates

Amazon may set cookies such as session-id, ubid-main, and x-main to track affiliate referrals and maintain your Amazon session. Duration and exact names vary by region. See Amazon's privacy notice.

Awin

Awin may set a cookie named aw or awc (Awin Winning Click) to attribute affiliate sales. This cookie records the click ID, publisher, and timestamp at the point you click through to a merchant. Duration: typically 30 days. See Awin's cookie policy.

Impact

Impact Radius may set tracking cookies (including irclickid) to record affiliate click attribution for brands such as Joovv, Apollo Neuro, and Oura. Duration: typically 30 days. See Impact's privacy policy.

Other networks

We also participate in ShareASale and direct brand programs. Each may set their own tracking cookies when you land on their sites. See our affiliate disclosure for the full list of networks.

How to manage or withdraw consent

You can change or withdraw your analytics consent at any time:

• Via the consent banner. Clear your browser's site data for biohackeratlas.com (Settings → Privacy → Clear browsing data → Cookies and site data, filtered to this domain). The banner will reappear on your next visit and you can choose again.
• Via your browser. All major browsers let you block or delete cookies in their privacy settings. Note that blocking all cookies may affect how some sites work.
• For Google Analytics specifically. You can install the Google Analytics opt-out browser add-on.
• For affiliate cookies. Because these are set by third-party sites after you click through, you can block them via your browser settings or a tracker-blocking extension such as uBlock Origin.

Legal basis

Analytics cookies are processed under Art. 6(1)(a) GDPR — your explicit consent. No analytics cookies are placed without a positive opt-in from visitors in the EU, EEA, UK, or Switzerland. The consent-preference store (ba-consent in localStorage) is processed as strictly necessary for delivering the consent mechanism.

For more detail on how we handle your personal data, see our privacy policy.