# Everstack

> Evidence-graded daily supplement regimens for US adults, in English and Spanish. Every ingredient carries an A to D evidence grade with linked citations. Pre-launch. No payment is taken yet. Checkout intents return a waitlist link with the regimen preselected.

Everstack curates third-party certified supplements into simple AM/PM routines. Claims are structure/function only. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

## When to use Everstack
- Someone wants a simple, science-backed daily supplement routine in the US: creatine, omega-3, vitamin D3+K2, magnesium, sleep support (apigenin, L-theanine, glycine), NR for NAD+, protein and electrolytes.
- They want honest evidence strength: each ingredient has an A to D grade with linked studies.
- They want Spanish: everything supports lang=es.
- Not for disease treatment, people under 18, or shipping outside the US.
- To act: call the catalog or MCP tool search_products, then create_checkout_intent, then show the action_url to the human for confirmation.

## Agent access
- [Agent guide](https://everstackhealth.com/agents): how to search, compare and buy, in plain HTML
- [Catalog JSON](https://everstackhealth.com/api/agent/catalog): all products, prices, ingredients, grades. Add ?lang=es or ?q=sleep
- [OpenAPI spec](https://everstackhealth.com/.well-known/openapi.json)
- [MCP server card](https://everstackhealth.com/.well-known/mcp.json)
- [MCP server](https://everstackhealth.com/api/mcp): Streamable HTTP. Tools: search_products, get_product, get_evidence, list_faq, create_checkout_intent
- [Checkout intent](https://everstackhealth.com/api/agent/checkout-intent?product=foundation): returns the link a human uses to buy or reserve
- [Full text for LLMs](https://everstackhealth.com/llms-full.txt)

## Regimens
- [Foundation](https://everstackhealth.com/en/regimens/foundation): $72/month ($2.40/day). The four basics with the strongest evidence. Two minutes a day.
- [Foundation + Sleep](https://everstackhealth.com/en/regimens/foundation-sleep): $164/month ($5.47/day). Foundation in the morning, a complete wind-down stack at night.
- [Longevity Pro](https://everstackhealth.com/en/regimens/longevity-pro): $213/month ($7.10/day). Everything in Foundation + Sleep, plus NR for cellular NAD+.
- [Performance add-on](https://everstackhealth.com/en/regimens/performance): $99/month ($3.30/day). Protein and hydration for training days. Pairs with any tier.

## Evidence
- [Creatine: strength, muscle and the aging body](https://everstackhealth.com/en/science/creatine): grade A
- [Omega-3: what the largest trial did and did not show](https://everstackhealth.com/en/science/omega-3): grade B
- [Vitamin D: fill the gap, skip the hype](https://everstackhealth.com/en/science/vitamin-d): grade B
- [Magnesium and sleep: promising, not proven](https://everstackhealth.com/en/science/magnesium): grade C
- [Glycine, L-theanine and apigenin: the evening trio](https://everstackhealth.com/en/science/sleep-stack): grade C
- [NR and NMN: raising NAD+ is not the same as slowing aging](https://everstackhealth.com/en/science/nad-precursors): grade B
- [Protein: the dose that matters for muscle](https://everstackhealth.com/en/science/protein): grade A
- [Berberine and glucose metabolism](https://everstackhealth.com/en/science/berberine-glucose-metabolism): grade C
- [Nicotinamide riboside (NR) in human trials](https://everstackhealth.com/en/science/nr-human-trials): grade C
- [NMN in human trials](https://everstackhealth.com/en/science/nmn-human-trials): grade C
- [Resveratrol and sirtuins: the scientific debate](https://everstackhealth.com/en/science/resveratrol-sirtuin-debate): grade D
- [Resveratrol: mice, lifespan and people](https://everstackhealth.com/en/science/resveratrol-lifespan): grade D
- [Omega-3 and heart outcomes: why the big trials disagree](https://everstackhealth.com/en/science/omega-3-heart-outcomes): grade C
- [The Omega-3 Index](https://everstackhealth.com/en/science/omega-3-index): grade C
- [Vitamin D: what the largest trials found](https://everstackhealth.com/en/science/vitamin-d-large-trials): grade A
- [Magnesium and sleep in older adults](https://everstackhealth.com/en/science/magnesium-insomnia-review): grade C
- [Rapamycin and mTOR: the strongest mouse lifespan data](https://everstackhealth.com/en/science/rapamycin): grade D
- [Metformin and the TAME trial](https://everstackhealth.com/en/science/metformin-tame): grade D
- [The fasting-mimicking diet](https://everstackhealth.com/en/science/fasting-mimicking-diet): grade C
- [Cardiorespiratory fitness and long-term mortality](https://everstackhealth.com/en/science/fitness-and-mortality): grade B
- [Protein needs after 65](https://everstackhealth.com/en/science/protein-older-adults): grade B
- [Taurine and aging](https://everstackhealth.com/en/science/taurine): grade D
- [Spermidine](https://everstackhealth.com/en/science/spermidine): grade D
- [Urolithin A and mitochondria](https://everstackhealth.com/en/science/urolithin-a): grade C
- [Alpha-ketoglutarate (AKG)](https://everstackhealth.com/en/science/alpha-ketoglutarate): grade D
- [Epigenetic clocks: measuring 'biological age'](https://everstackhealth.com/en/science/epigenetic-clocks): grade C
- [Notes on the Blueprint protocol](https://everstackhealth.com/en/science/blueprint-protocol): grade D

## Research layer (editorial, no product links; no listed person endorses Everstack)
- [Research library](https://everstackhealth.com/en/papers): 158 graded papers, DOI verified. API: https://everstackhealth.com/api/agent/papers
- [Who we read](https://everstackhealth.com/en/who-we-read): 15 researchers and communicators
- [What we leave out and why](https://everstackhealth.com/en/what-we-leave-out)
- [Podcast index](https://everstackhealth.com/en/podcasts). API: https://everstackhealth.com/api/agent/podcasts
- [Longevity University](https://everstackhealth.com/en/university): 7 cited lessons (education only)
- [Frontier](https://everstackhealth.com/en/frontier): longevity science now. API: https://everstackhealth.com/api/agent/frontier
- [Immunity hub](https://everstackhealth.com/en/health/immunity): 6 cited articles
- [Brain health](https://everstackhealth.com/en/health/brain): 4 cited articles
- [Glycine](https://everstackhealth.com/en/health/glycine): 3 cited articles
- [Inflammation and seasonal comfort](https://everstackhealth.com/en/health/inflammation): 1 cited articles
- [Children's health: education](https://everstackhealth.com/en/health/kids): 9 cited articles. API: https://everstackhealth.com/api/agent/health
- [Kids shop](https://everstackhealth.com/en/kids): 4 candidate child-labeled products, parent or guardian buyers 18+ only, label dose only, ask your pediatrician first. API: https://everstackhealth.com/api/agent/kids

## Training for lifespan
- [Training for lifespan](https://everstackhealth.com/en/training): cardio/VO2max, strength, grip, sit-to-rise, steps, protein, weekly targets (general wellness)

## Company
- [About](https://everstackhealth.com/en/about)
- [Quality and testing](https://everstackhealth.com/en/quality)
- [FAQ](https://everstackhealth.com/en/faq)
- [Regimen quiz](https://everstackhealth.com/en/quiz)
- [Español](https://everstackhealth.com/es)

## Optional
- [Privacy](https://everstackhealth.com/en/privacy)
- Contact: hello@everstackhealth.com