Question 1

How does the health assessment work?

Accepted Answer

It takes about 5 minutes. We ask about your health goals, diet, lifestyle, sleep, exercise habits, and any existing conditions. Our AI analyzes your responses against clinical research to build a stack tailored to your specific profile.

Question 2

How does the AI determine my recommendations?

Accepted Answer

Our recommendation engine cross-references your health data with peer-reviewed research on nutrient interactions, bioavailability, and dosing protocols. It's not a simple quiz-to-product mapping — it's a genuine analysis of what your body likely needs.

Question 3

Can I retake the assessment if my goals change?

Accepted Answer

Absolutely. Your health evolves, and your stack should too. Retake the assessment anytime from your account dashboard, and we'll update your recommendations accordingly.

Question 4

Is the quiz based on real science?

Accepted Answer

Every question maps to a clinical variable. We don't ask anything for fun. Our recommendation logic is built on published research and reviewed by our science advisory team.

Question 5

What if I'm already taking supplements?

Accepted Answer

Tell us in the assessment. We factor in what you're currently taking to avoid redundancy and ensure safe dosing. We'd rather you take less than double up on something you don't need.

Question 6

What is the SiPhox blood test?

Accepted Answer

It's an at-home blood test kit that measures key biomarkers from a simple finger prick. No lab visit required. SiPhox is a clinical-grade testing partner trusted by health professionals.

Question 7

What biomarkers does it measure?

Accepted Answer

The panel covers vitamins (D, B12), minerals (iron, magnesium, zinc), metabolic markers (glucose, HbA1c), lipids (cholesterol, triglycerides), inflammation (hsCRP), thyroid function, and more. Over 20 biomarkers in total.

Question 8

How long does it take to get results?

Accepted Answer

From the day you mail back your sample, results typically arrive in 5-7 business days. Your updated stack recommendation will be ready within 48 hours of receiving your results.

Question 9

Is the blood test required?

Accepted Answer

Not at all. Phase 1 (quiz-based) gives you a strong, data-informed stack. The blood test is optional for those who want clinical-grade precision. Think of it as going from good to exceptional.

Question 10

How does the blood test change my stack?

Accepted Answer

Real biomarker data lets us see what's actually happening inside your body. We might increase a dose, remove something you don't need, or add a nutrient you're genuinely deficient in. It's the difference between educated guessing and knowing.

Question 11

Where are your supplements sourced?

Accepted Answer

We source from GMP-certified facilities in the US and Europe. Every ingredient is third-party tested for purity and potency. We publish our sourcing partners — no black-box supply chains.

Question 12

Are the supplements third-party tested?

Accepted Answer

Yes, every batch. We test for heavy metals, microbial contamination, and label accuracy. Certificates of analysis are available upon request from your account dashboard.

Question 13

How are the doses determined?

Accepted Answer

Doses are based on clinically studied amounts — not the bare minimums you'll find in most multivitamins. We reference established upper limits and your personal data to find the right therapeutic dose for you.

Question 14

What's actually in my daily pack?

Accepted Answer

Your pack contains individual capsules for each supplement in your stack. Every capsule is clearly labeled. No proprietary blends, no mystery powders. You'll know exactly what you're taking and why.

Question 15

Are there any fillers or artificial ingredients?

Accepted Answer

We use minimal excipients — only what's necessary for capsule stability and bioavailability. No artificial colors, flavors, or unnecessary fillers. The ingredient list is on every label.

Question 16

How much does Stack cost?

Accepted Answer

Pricing depends on your personalized stack since everyone gets different supplements and quantities. You'll see your exact price after completing the health assessment. No hidden fees.

Question 17

Can I pause or cancel anytime?

Accepted Answer

Yes, with no penalties. Pause or cancel from your account dashboard before your next billing date. We don't believe in trapping people — if Stack isn't right for you, you can leave easily.

Question 18

How often am I billed?

Accepted Answer

Monthly by default. Each shipment is a 30-day supply. You can adjust your delivery frequency from your account if you need more time between shipments.

Question 19

Can I change my stack after subscribing?

Accepted Answer

Yes. Retake the health assessment or add the blood test anytime. If your recommendations change, your next shipment will reflect the updated stack at the adjusted price.

Question 20

Do you offer a money-back guarantee?

Accepted Answer

We offer a 30-day satisfaction guarantee on your first order. If you're not happy with your stack, contact us and we'll make it right.

Question 21

How long does shipping take?

Accepted Answer

Standard shipping is 3-5 business days within the US. Expedited options are available at checkout. Your blood test kit ships separately and arrives within 2-3 business days.

Question 22

How do I track my order?

Accepted Answer

You'll receive a tracking number via email as soon as your order ships. You can also check order status anytime from your account dashboard.

Question 23

Do you ship internationally?

Accepted Answer

We currently ship within the United States. International shipping is on our roadmap — join our waitlist to be notified when we expand to your region.

Question 24

What if my package is lost or damaged?

Accepted Answer

Contact us and we'll send a replacement at no cost. We work with reliable carriers, but if something goes wrong in transit, that's on us to fix.

Everything you need to know

How It Works

Blood Testing

Your Supplements

Subscription & Billing

Shipping & Delivery