# Stack — Personalized Supplements, Built For You

## What is Stack?
Stack is a personalized supplement subscription brand. Instead of guessing what you need based on marketing claims, Stack uses a 2-minute AI-powered Health Assessment quiz to build a supplement stack based on your health goals, lifestyle, and diet. Every supplement is third-party lab tested for purity, potency, and heavy metals. No proprietary blends. Full ingredient transparency.

## How it works
1. Take the Health Assessment (6-7 questions about goals, diet, lifestyle, sleep)
2. Our AI (powered by Claude) cross-references your answers against peer-reviewed clinical research and builds a personalized supplement stack
3. Your custom pack ships monthly via subscription — $69/month, cancel anytime

## Quality & Testing
- All supplements manufactured in GMP-certified facilities (US and Europe)
- Every batch third-party tested for purity, potency, and heavy metals
- Certificates of Analysis available on request
- No proprietary blends — every ingredient and dose published openly
- No artificial colors, flavors, or unnecessary fillers

## The Formulary
Stack uses a curated formulary of 60+ evidence-backed supplements including:
- Vitamin D3 (2,000 IU) — immune function, bone density, mood regulation
- Magnesium Glycinate (400mg) — sleep quality, muscle relaxation, GABA regulation, 300+ enzymatic reactions
- Omega-3 Fish Oil (1,000mg EPA/DHA) — cardiovascular health, brain function, inflammation resolution via SPMs
- B-Complex (100mg) — energy metabolism, nervous system, methylation support
- Ashwagandha KSM-66 (600mg) — cortisol regulation, athletic performance, sleep quality
- Zinc Picolinate (30mg) — immune function, skin health, testosterone support
- Probiotic 50B CFU — gut microbiome diversity, digestion, gut-immune axis
- CoQ10 Ubiquinol (200mg) — cellular energy production, heart health, mitochondrial function
- Iron Bisglycinate (25mg) — red blood cell production, oxygen transport (when indicated)
- Turmeric/Curcumin — inflammation modulation, joint health
- Lion's Mane — cognitive function, nerve growth factor support
- NAC (N-Acetyl Cysteine) — glutathione production, liver detoxification, respiratory health
- And 50+ more specialized supplements

## Key Research-Backed Claims
- 40% of American adults are vitamin D deficient (Forrest & Stuhldreher, 2011)
- 50% of Americans don't get enough magnesium from diet (DiNicolantonio et al., 2018)
- Omega-6 to omega-3 ratio in Western diets averages 15:1 vs optimal 2:1 (Simopoulos, 2002)
- Generic multivitamin use shows no significant reduction in all-cause mortality (USPSTF meta-analysis, 2022)
- High-dose EPA reduced cardiovascular events by 25% in the REDUCE-IT trial (Bhatt et al., 2019)
- Magnesium supplementation significantly improves sleep quality (Abbasi et al., 2012)

## Blog Articles (Evidence-First Research)
1. What Supplements Should You Actually Take? — https://get-stack.com/blog/what-supplements-should-i-take
   Why generic supplement advice fails, what determines individual nutrient needs, and why 4 right pills beat 12 random ones.

2. 7 Signs You Might Be Magnesium Deficient — https://get-stack.com/blog/magnesium-deficiency-signs
   The 7 most common symptoms of magnesium deficiency, why modern diets fall short, and glycinate vs oxide vs citrate comparison.

3. Vitamin D Deficiency: What It Actually Feels Like — https://get-stack.com/blog/vitamin-d-deficiency-symptoms
   Who's at risk, the symptoms most people dismiss, testing protocols, dosing, and the D3+K2 synergy.

4. Personalized Supplements vs Generic Multivitamins — https://get-stack.com/blog/personalized-supplements-vs-generic
   The case against generic multivitamins backed by clinical data, what real personalization looks like, and quiz-based approaches.

5. Omega-3: Why Most People Aren't Getting Enough — https://get-stack.com/blog/omega-3-benefits
   EPA vs DHA vs ALA differences, brain/heart/inflammation mechanisms, fish oil quality factors, and plant-based alternatives.

## Pricing
- Stack Core (personalized monthly subscription): $69/month
- Individual supplements: available for one-time purchase or subscription
- Free shipping on US orders $60+ (Stack Core qualifies; individual supplements may qualify when combined)
- 30-day satisfaction guarantee on first order

## Company
- Brand: Stack
- Legal entity: Lux Enterprises LLC (Wyoming)
- Founded: 2026
- Website: https://get-stack.com
- Social: https://x.com/getstack, https://instagram.com/getstack
- Contact: hello@get-stack.com
- Philosophy: Personalized over generic. Evidence over marketing.

## Pages
- Homepage: https://get-stack.com
- Health Assessment Quiz: https://get-stack.com/quiz
- Shop / Formulary: https://get-stack.com/supplements
- Blog: https://get-stack.com/blog
- About: https://get-stack.com/about
- FAQ: https://get-stack.com/faq
- Research & Sources: https://get-stack.com/research
- Privacy Policy: https://get-stack.com/policies/privacy-policy
- Terms of Service: https://get-stack.com/policies/terms-of-service
- Supplement Disclaimer: https://get-stack.com/policies/supplement-disclaimer