Frequently Asked Questions

CanIStackThis is an AI-powered supplement safety platform that analyzes potential interactions between supplements, provides safety scores, and offers personalized recommendations to help people make informed decisions about their supplement combinations.

Basic supplement interaction analysis is free — our core interaction checks, safety scoring, Build My Stack, and the label milligram tally are available at no cost (subject to fair-use rate limits). A free account adds phone reminders with calendar export, lets you save one stack (we re-score it about monthly and email you if its score changes), and includes one free bottle scan. Premium ($9.99/mo, or $4.99/mo for founding members, or $59/yr annually) unlocks unlimited saved stacks, unlimited bottle scans, DNA analysis while subscribed, Food & Absorption (meal planning), timing schedules, and advanced safety analysis. A one-time $29 DNA Supplement Report gives permanent DNA analysis with report export — no subscription needed, with a 14-day money-back guarantee. See our Premium page for details.

Our AI analyzes publicly available information from reputable medical websites — the NIH Office of Dietary Supplements, WebMD, Mayo Clinic, and Examine.com. It does not draw on proprietary databases or clinical trial data, and it uses conservative logic that errs toward caution. Our analysis is for informational purposes only and should not replace professional medical advice. Always consult healthcare providers before making supplement decisions.

Basic supplement interaction analysis is free. Premium unlocks unlimited stacks and advanced features:

• Free — core interaction analysis, safety scoring, Build My Stack, and the label milligram tally (rate-limited); a free account adds phone reminders with calendar export, one saved stack (re-scored about monthly with an email alert), and one free bottle scan
• Premium — $9.99/mo (or $4.99/mo for the first 100 founding members, or $59/yr annually): unlimited saved stacks (all re-scored monthly), unlimited bottle scans, DNA analysis (included with any plan, monthly or annual, while subscribed), Food & Absorption, timing schedules, and advanced safety analysis. The annual plan also includes a keep-forever DNA report.
• DNA Supplement Report — $29 one-time: permanent personalized supplement insights from your 23andMe or AncestryDNA raw file, with report export — no subscription needed, and a 14-day money-back guarantee

See our Premium page for full details.

DNA analysis access locks when your subscription ends. First, what we actually store: we never keep your raw DNA file — it's read in memory and discarded immediately. The only thing saved is the small set of gene markers we analyze (your results), and you can delete those anytime from your report page. We keep those results for 365 days, so re-subscribing restores them. For keep-forever access, the annual plan includes a keep-forever DNA report, or the one-time $29 DNA Supplement Report gives permanent access with no subscription needed. The one-time report carries a 14-day money-back guarantee — email hello@canistackthis.com within 14 days of purchase for a full refund (one refund per customer).

We analyze publicly available information from reputable medical websites, not proprietary databases or clinical trial data:

• NIH Office of Dietary Supplements
• WebMD
• Mayo Clinic
• Examine.com

We do not have access to proprietary medical databases, clinical trial data, or official regulatory agency APIs. See our How It Works page for full details on our data sources and limitations.

Our AI-powered Safety Score considers multiple factors including individual supplement safety, known interactions between supplements, dosage appropriateness, and potential overdose risks. Scores run on a 1–10 scale, where a higher score indicates a safer combination. The system uses conservative logic and tends to assign lower scores to larger or more complex combinations, erring on the side of caution.

Analyses are generated on demand and cached, drawing on publicly available medical sources that we review periodically. CanIStackThis is not a real-time clinical feed, so the information may not reflect the very latest research — always confirm with a healthcare professional before making supplement decisions.

Use our search feature to find supplements by name or ingredient. Add them to your analysis and our AI will evaluate potential interactions, provide safety scores, and offer personalized recommendations for your specific combination.

Please contact us immediately through our "Report Supplement Data" form or email support@canistackthis.com. Include the supplement name, brand, the incorrect information, and supporting documentation if available. We prioritize data accuracy corrections.

Yes. A free account (email or Google sign-in) lets you save one stack — we re-score it about once a month and email you if its score changes. Premium unlocks unlimited saved stacks, all re-scored monthly, on your My Stacks page. Learn more on our Premium page.

Yes, we provide educational information based on publicly available scientific research. Our analysis is for informational purposes only and should not replace professional medical advice. Always consult healthcare providers before making supplement decisions.

We collect minimal information necessary to provide our services, such as supplement queries and basic analytics. We don't require user accounts for basic analysis. See our Privacy Policy for complete details on data collection and use.

Companies can request corrections of factual inaccuracies or provide additional documentation through our data correction process. Our analysis is drawn from publicly available information on reputable medical websites, and we prioritize keeping it accurate.

Try refreshing the page or clearing your browser cache. If problems persist, contact our technical support at support@canistackthis.com with details about your browser, device, and the specific issue you're experiencing.

CanIStackThis works in any phone browser with nothing to install — and it's also an installable web app: use your browser's "Add to Home Screen" and it opens like an app, including free phone reminders for your supplement schedule (sign in, then tap "Remind me on my phone" on a schedule).

Yes, each analysis generates a unique URL that you can bookmark or share. However, remember that supplement needs are personal, and what works for one person may not be appropriate for another.