Privacy Policy

At Stack, your privacy is foundational to how we operate. This Privacy Policy explains how we collect, use, and protect your personal information when you use our website, health assessment, and supplement subscription service.

Information We Collect: We collect information you provide directly — your name, email address, shipping address, payment details, health assessment responses, and optionally, blood test results through our SiPhox Health partnership. We also collect standard usage data such as browser type, pages visited, and device information.

How We Use Your Information: Your health data is used solely to generate personalized supplement recommendations. We never sell your health data to third parties. Payment information is processed securely through our payment provider and is never stored on our servers.

Blood Test Data: If you opt into blood testing, your biomarker data is processed in partnership with SiPhox Health. Results are used exclusively to refine your supplement recommendations. You can request deletion of your blood test data at any time.

Data Security: We use industry-standard encryption (TLS 1.3) for all data in transit and AES-256 encryption for data at rest. Access to personal health data is restricted to essential personnel and automated systems.

Your Rights: You may access, correct, or delete your personal data at any time by contacting support@get-stack.com or through your account settings. California residents have additional rights under the CCPA.

Contact: For privacy-related inquiries, email privacy@get-stack.com.