Privacy policy

Last updated: October 29, 2026

This Privacy Policy explains how Diana Ayna LLC, doing business as Best Ketone Test ("we", "us", "our"), collects, uses and shares personal information when you visit bestketonetest.com or buy from us.

1. Who we are

Diana Ayna LLC
14205 N Mo Pac Expy, Ste 570 PMB 708146
Austin, Texas 78728
United States
Email: care@bestketonetest.com

For visitors in the European Economic Area and the United Kingdom, Diana Ayna LLC is the data controller for the personal information described in this policy.

2. Information we collect

Information you give us: name, email address, shipping and billing address, phone number, order details, and anything you send us through forms, reviews or email.

Information collected automatically: IP address, browser and device type, pages viewed, links clicked, how you arrived at our site, and cookie or device identifiers. See Section 6 for the tools that collect this.

Payment information: card payments are processed by Shopify and our payment providers. We do not see or store your full card number.

3. How we use your information

• To process and ship orders, handle returns and provide customer support.
• To run our store and keep it secure, including preventing fraud.
• To send order updates by email or text message.
• To send marketing emails or text messages, only if you have opted in.
• To understand how visitors use our site so we can improve it (analytics).
• To measure and show ads for our products on other websites and apps (advertising).

4. Legal bases (EEA and UK visitors)

• Contract: processing your order and providing customer support.
• Consent: analytics and advertising cookies, marketing emails and marketing text messages. You can withdraw consent at any time.
• Legitimate interests: running and securing our store, preventing fraud, and Shopify's own store reporting and analytics.
• Legal obligation: keeping records required by tax and accounting law.

5. Your cookie choices

In regions where consent is required, including the EEA and the UK, we show a cookie banner and do not load analytics or advertising tools unless you accept them. You can accept, decline or adjust your choices. If you decline, those tools are not loaded on the pages you visit after that.

You can change your choice at any time using the Cookie preferences link in the footer of our site.

You can also block or delete cookies in your browser settings, or use these opt-out tools:

• Google ad personalization: https://adssettings.google.com
• Google Analytics opt-out browser add-on: https://tools.google.com/dlpage/gaoptout

Shopify's essential cookies, needed for the cart, checkout and security, are always set because the store cannot work without them.

6. Tools and cookies we use

Essential (always active)

Shopify store analytics (legitimate interests)

Analytics (only with consent where required)

Advertising and marketing (only with consent where required)

7. Who we share information with

We do not sell your personal information for money. We share it only with the service providers we use to run our store:

• Shopify (store platform, checkout, store analytics). Shopify's privacy policy: https://www.shopify.com/legal/privacy
• Payment providers: Shopify Payments, Shop Pay, PayPal, Amazon Pay, Apple Pay and Google Pay, depending on how you pay.
• Analytics: Google Analytics and Microsoft Clarity.
• Advertising: Google, Microsoft and Meta.
• Email, text messages and reviews: Klaviyo and Judge.me.
• Subscriptions: Seal Subscriptions, if you buy a subscription.
• Shipping carriers, to deliver your order.

We may also disclose information if required by law, to protect our rights, or if our business is sold or merged.

8. International transfers

We are based in the United States, and our service providers process data in the United States and other countries. If you are outside the United States, your information will be transferred there. Where required, our providers use legal safeguards such as the European Commission's Standard Contractual Clauses.

9. How long we keep information

We keep order and customer records for as long as needed to provide our products and support, and as long as tax and accounting laws require. Marketing data is kept until you unsubscribe or ask us to delete it. Cookie data is kept for the periods set by each provider listed in Section 6.

10. Your rights

Depending on where you live, you may have the right to:

• Access the personal information we hold about you.
• Correct information that is wrong.
• Delete your information.
• Object to or restrict how we use it.
• Receive a copy of your information in a portable format.
• Withdraw consent at any time, without affecting processing done before you withdrew it.
• Complain to your local data protection authority.

To make a request, email care@bestketonetest.com. We may need to confirm your identity before acting on it.

Deleting your account: log in at bestketonetest.com/account and tap "Delete my account" under Account Details. We will confirm by email when it is done. If you do not have an account, email care@bestketonetest.com and we will delete your information.

11. Email and text messages

Email: we send marketing emails only if you subscribe. Every email has an unsubscribe link.

Text messages: if you provide your phone number with an order, we may text you about that order. We send marketing text messages, including abandoned cart reminders, only if you opt in. Consent is not a condition of purchase. Marketing texts will not exceed 5 per month. Reply STOP to cancel or HELP for help. Message and data rates may apply. We do not share your phone number or text messaging consent with third parties for their own marketing.

12. Security

We use reasonable safeguards to protect your information. Our site uses encrypted (HTTPS) connections, and payments are handled by PCI DSS compliant providers. No method of transmission or storage is completely secure.

13. Children

Our store is not directed to children under 16, and we do not knowingly collect their personal information. By using this site you confirm that you are at least the age of majority where you live, or that you have the consent of a parent or guardian.

14. Changes to this policy

We may update this policy. Changes take effect when posted here, and the "Last updated" date at the top will change. If we make material changes, we will note them on this page.

15. Contact

Questions about this policy or your information:
care@bestketonetest.com
Diana Ayna LLC, 14205 N Mo Pac Expy, Ste 570 PMB 708146, Austin, Texas 78728, United States