# The Longevity Agent — llms.txt
# Supplement price comparison search engine
# https://thelongevityagent.com

## What This Site Does
Search and compare supplement prices from 16 vetted retailers.
201 products across 64 supplements.
Build supplement stacks via URL. No API key needed.

## Cart URL Scheme
  https://thelongevityagent.com/cart?items=SLUG1,SLUG2,SLUG3
  https://thelongevityagent.com/cart?items=SLUG1,SLUG2&vendor=iherb  (lock to single vendor)
  https://thelongevityagent.com/cart?items=SLUG1,SLUG2&min_trust=6  (only vendors with trust 6+)

## JSON API (free, no auth)
  /api/v1 — API documentation and endpoint list
  /api/v1/products — All products (search with ?q=, filter with ?ingredient=)
  /api/v1/products/:slug — Single product with alternatives
  /api/v1/ingredients — All ingredients with metadata
  /api/v1/ingredients/:slug — Ingredient detail with all products and research
  /api/v1/vendors — Vendor list with trust scores
  /api/v1/compare?slugs=SLUG1,SLUG2 — Compare products, get totals
  /api/v1/interactions?ingredients=quercetin,omega-3 — Check interactions
  /api/v1/protocols — Biohacker protocol stacks

## Full Documentation
Visit https://thelongevityagent.com/prices for the complete price database with all product slugs, prices, vendor info, and interaction rules.

## Key Pages
  / — Homepage with search bar
  /protocols — Biohacker protocols (Johnson, Attia, Huberman, Greenfield, Patrick)
  /ingredients — All 64 supplements
  /trust-methodology — How we score vendors (2-10 scale)
  /why-not-amazon — Amazon supplement risks
  /how-we-make-money — Revenue transparency

## Supplement Pages
  /ingredients/5-mthf — 5-MTHF (Active Folate) (from $8.95, 3 products)
  /ingredients/alpha-gpc — Alpha-GPC (from $18.99, 3 products)
  /ingredients/alpha-lipoic-acid — Alpha-Lipoic Acid (from $10.00, 4 products)
  /ingredients/apigenin — Apigenin (from $8.99, 3 products)
  /ingredients/ashwagandha — Ashwagandha (from $14.99, 4 products)
  /ingredients/astaxanthin — Astaxanthin (from $10.50, 3 products)
  /ingredients/b-complex — B-Complex (from $8.10, 4 products)
  /ingredients/berberine — Berberine (from $14.95, 4 products)
  /ingredients/boron — Boron (from $5.25, 3 products)
  /ingredients/calcium-akg — Calcium Alpha-Ketoglutarate (from $24.99, 2 products)
  /ingredients/citicoline — Citicoline (CDP-Choline) (from $18.99, 3 products)
  /ingredients/coq10 — CoQ10 / Ubiquinol (from $18.99, 4 products)
  /ingredients/collagen — Collagen Peptides (from $19.96, 4 products)
  /ingredients/creatine — Creatine Monohydrate (from $13.95, 5 products)
  /ingredients/dim — DIM (Diindolylmethane) (from $15.65, 3 products)
  /ingredients/electrolytes — Electrolyte Supplements (from $20.00, 1 products)
  /ingredients/ergothioneine — Ergothioneine (from $18.00, 2 products)
  /ingredients/psyllium-husk — Fiber / Psyllium Husk (from $11.62, 4 products)
  /ingredients/fisetin — Fisetin (from $11.25, 3 products)
  /ingredients/aged-garlic — Garlic Extract (Aged) (from $13.19, 3 products)
  /ingredients/glucosamine — Glucosamine (from $14.99, 3 products)
  /ingredients/glutathione — Glutathione (from $14.68, 4 products)
  /ingredients/glycine — Glycine (from $8.99, 3 products)
  /ingredients/egcg — Green Tea Extract / EGCG (from $11.62, 3 products)
  /ingredients/hyaluronic-acid — Hyaluronic Acid (from $16.49, 2 products)
  /ingredients/iron — Iron (from $9.17, 3 products)
  /ingredients/l-theanine — L-Theanine (from $15.99, 3 products)
  /ingredients/lions-mane — Lion's Mane (from $18.99, 3 products)
  /ingredients/lutein-zeaxanthin — Lutein / Zeaxanthin (from $17.42, 3 products)
  /ingredients/msm — MSM (from $14.95, 3 products)
  /ingredients/magnesium-glycinate — Magnesium Glycinate (from $13.95, 4 products)
  /ingredients/melatonin — Melatonin (from $5.99, 3 products)
  /ingredients/milk-thistle — Milk Thistle / Silymarin (from $19.99, 3 products)
  /ingredients/nac — NAC (N-Acetylcysteine) (from $11.25, 4 products)
  /ingredients/nmn — NMN (Nicotinamide Mononucleotide) (from $34.99, 2 products)
  /ingredients/nattokinase — Nattokinase (from $14.99, 3 products)
  /ingredients/niacinamide — Niacinamide (Vitamin B3) (from $6.99, 3 products)
  /ingredients/nicotinamide-riboside — Nicotinamide Riboside (from $34.50, 3 products)
  /ingredients/omega-3 — Omega-3 (EPA/DHA) (from $24.75, 4 products)
  /ingredients/pqq — PQQ (Pyrroloquinoline Quinone) (from $15.00, 3 products)
  /ingredients/phosphatidylserine — Phosphatidylserine (from $20.42, 3 products)
  /ingredients/prebiotics — Prebiotics (Inulin/GOS) (from $10.99, 3 products)
  /ingredients/probiotics — Probiotics (from $15.73, 3 products)
  /ingredients/quercetin — Quercetin (from $9.00, 4 products)
  /ingredients/resveratrol — Resveratrol (from $17.99, 3 products)
  /ingredients/rhodiola — Rhodiola Rosea (from $14.95, 3 products)
  /ingredients/saw-palmetto — Saw Palmetto (from $15.30, 3 products)
  /ingredients/selenium — Selenium (from $8.99, 3 products)
  /ingredients/spermidine — Spermidine (from $19.50, 2 products)
  /ingredients/sulforaphane — Sulforaphane / Broccoli Sprout Extract (from $7.64, 3 products)
  /ingredients/tmg — TMG (Trimethylglycine) (from $10.13, 3 products)
  /ingredients/taurine — Taurine (from $9.75, 4 products)
  /ingredients/tetrahydrocurcumin — Tetrahydrocurcumin (from $21.99, 2 products)
  /ingredients/tributyrin — Tributyrin (from $18.75, 2 products)
  /ingredients/curcumin — Turmeric / Curcumin (from $14.69, 4 products)
  /ingredients/urolithin-a — Urolithin A (from $125.00, 1 products)
  /ingredients/vitamin-a — Vitamin A (from $6.72, 2 products)
  /ingredients/vitamin-b12 — Vitamin B12 (Methylcobalamin) (from $11.99, 3 products)
  /ingredients/vitamin-b6 — Vitamin B6 (P-5-P) (from $9.99, 2 products)
  /ingredients/vitamin-c — Vitamin C (from $9.00, 4 products)
  /ingredients/vitamin-d3 — Vitamin D3 (from $10.49, 4 products)
  /ingredients/vitamin-e — Vitamin E (Mixed Tocopherols) (from $8.71, 3 products)
  /ingredients/vitamin-k2 — Vitamin K2 (MK-7) (from $12.49, 4 products)
  /ingredients/zinc — Zinc (from $6.07, 6 products)

## Vendors (16 total)
  thorne — Thorne (trust: 9/10)
  life-extension — Life Extension (trust: 9/10)
  nootropics-depot — Nootropics Depot (trust: 9/10)
  pure-encapsulations — Pure Encapsulations (trust: 9/10)
  iherb — iHerb (trust: 8/10)
  jarrow — Jarrow Formulas (trust: 8/10)
  nordic-naturals — Nordic Naturals (trust: 8/10)
  momentous — Momentous (trust: 8/10)
  now-foods — NOW Foods (trust: 7/10)
  swanson — Swanson Vitamins (trust: 7/10)
  vital-proteins — Vital Proteins (trust: 7/10)
  garden-of-life — Garden of Life (trust: 7/10)
  natures-way — Nature's Way (trust: 7/10)
  bulk-supplements — Bulk Supplements (trust: 6/10)
  nutricost — Nutricost (trust: 6/10)
  amazon — Amazon (trust: 2/10)

## All Product Slugs (201 total)
  5mthf-jarrow-400mcg
  5mthf-pe-1000mcg
  5mthf-thorne-1mg
  ala-now-250mg-120ct
  ala-now-600mg-120ct
  ala-nutricost-300mg-240ct
  ala-nutricost-rala-100mg-120ct
  alphagpc-momentous-300mg
  alphagpc-nd-300mg
  alphagpc-now-300mg
  apigenin-momentous-50mg
  apigenin-nd-50mg
  apigenin-swanson-50mg
  ashwagandha-jarrow-ksm66
  ashwagandha-momentous-sensoril
  ashwagandha-nd-ksm66
  ashwagandha-now-450mg
  astaxanthin-le-4mg
  astaxanthin-nd-12mg
  astaxanthin-now-12mg
  b12-jarrow-5000mcg
  b12-now-5000mcg
  b12-thorne-1000mcg
  b6-now-50mg
  b6-thorne-180mg
  bcomplex-jarrow-bright-100ct
  bcomplex-lifeextension-bioactive-60ct
  bcomplex-now-b50-100ct
  bcomplex-thorne-basic-60ct
  berberine-le-500mg
  berberine-now-400mg
  berberine-nutricost-500mg
  berberine-thorne-1000mg
  boron-le-3mg
  boron-now-3mg
  boron-nutricost-3mg
  cakg-nd-500mg
  cakg-prohealth-1000mg
  citicoline-jarrow-250mg
  citicoline-le-250mg
  citicoline-nd-250mg
  collagen-bulk-10g
  collagen-gol-20g
  collagen-momentous-15g
  collagen-vp-20g
  coq10-jarrow-100mg
  coq10-le-100mg
  coq10-now-100mg
  coq10-thorne-100mg
  creatine-bulk-5g
  creatine-momentous-5g
  creatine-now-5g
  creatine-nutricost-5g
  creatine-thorne-5g
  curcumin-le-500mg
  curcumin-now-bioperine-665mg-90ct
  curcumin-now-phytosome-500mg-60ct
  curcumin-thorne-phytosome-1000mg-120ct
  curcumin-thorne-phytosome-500mg-60ct
  d3-now-5000iu
  d3-nutricost-5000iu
  d3-pe-5000iu
  d3-thorne-5000iu
  dim-naturesway-dimplus-120ct
  dim-now-200mg-90ct
  dim-thorne-hormoneadvantage-60ct
  egcg-lifeextension-mega-725mg-100ct
  egcg-now-400mg-180ct
  egcg-now-400mg-90ct
  electrolytes-lmnt-variety-12ct
  ergo-le-5mg
  ergo-nd-5mg
  fisetin-db-100mg
  fisetin-le-100mg
  fisetin-nd-100mg
  garlic-kyolic-agd-300mg-200ct
  garlic-kyolic-agd-300mg-300ct
  garlic-kyolic-bp-formula109-160ct
  glucosamine-jarrow-750mg
  glucosamine-now-750mg
  glucosamine-nw-1500mg
  glutathione-jarrow-reduced-500mg-60ct
  glutathione-now-500mg-60ct
  glutathione-pure-liposomal-375mg-30ct
  glutathione-thorne-sr-175mg-60ct
  glycine-bulk-3g
  glycine-now-1000mg
  glycine-thorne-500mg
  ha-le-100mg
  ha-now-100mg
  iron-now-bisglycinate-18mg-120ct
  iron-now-bisglycinate-36mg-90ct
  iron-thorne-bisglycinate-25mg-60ct
  k2-jarrow-90mcg
  k2-le-200mcg
  k2-now-100mcg
  k2-thorne-100mcg
  lionsmane-bulk-500mg
  lionsmane-nd-500mg
  lionsmane-now-500mg
  lutein-jarrow-20mg-120ct
  lutein-now-25mg-120ct
  lutein-now-25mg-60ct
  magnesium-now-200mg
  magnesium-nutricost-200mg
  magnesium-pe-120mg
  magnesium-thorne-200mg
  melatonin-le-3mg
  melatonin-now-3mg
  melatonin-nutricost-5mg
  milkthistle-jarrow-150mg-200ct
  milkthistle-lifeextension-advanced-120ct
  milkthistle-now-300mg-200ct
  msm-bulk-1g
  msm-jarrow-1000mg
  msm-now-1000mg
  nac-jarrow-600mg
  nac-le-600mg
  nac-now-600mg
  nac-nutricost-600mg
  nattokinase-doctorsbest-2000fu-270ct
  nattokinase-doctorsbest-2000fu-90ct
  nattokinase-now-100mg-120ct
  niacinamide-le-500mg
  niacinamide-now-500mg
  niacinamide-nutricost-500mg
  nmn-le-250mg
  nmn-nd-250mg
  nr-le-300mg
  nr-thorne-300mg
  nr-truniagen-300mg
  omega3-le-super
  omega3-momentous
  omega3-nordic-1280mg
  omega3-thorne-coq10
  pqq-jarrow-20mg
  pqq-le-20mg
  pqq-nd-20mg
  prebiotics-bulk-inulin
  prebiotics-gol-fiber
  prebiotics-now-inulin
  probiotics-jarrow-eps-5b-60ct
  probiotics-now-10strain-25b-100ct
  probiotics-now-10strain-50b-50ct
  ps-jarrow-100mg-120ct
  ps-jarrow-100mg-60ct-softgels
  ps-now-100mg-120ct
  psyllium-now-caps-500mg-500ct
  psyllium-now-organic-powder-340g
  psyllium-now-powder-680g
  psyllium-nutricost-500mg-500ct
  quercetin-le-500mg
  quercetin-nd-500mg
  quercetin-now-500mg
  quercetin-thorne-250mg
  resveratrol-doctorsbest-600mg-60ct
  resveratrol-now-200mg-120ct
  resveratrol-prohealth-1000mg-60ct
  rhodiola-jarrow-500mg
  rhodiola-nd-500mg
  rhodiola-now-500mg
  sawpalmetto-now-160mg-240ct
  sawpalmetto-now-320mg-90ct
  sawpalmetto-now-berries-550mg-250ct
  selenium-le-200mcg
  selenium-now-200mcg
  selenium-thorne-200mcg
  spermidine-le-autophagy
  spermidine-slife-1mg
  sulforaphane-jarrow-broccomax-120ct
  sulforaphane-swanson-400mcg-60ct
  sulforaphane-thorne-crucerasgs-60ct
  taurine-bulk-1g
  taurine-le-1000mg
  taurine-now-1000mg
  taurine-nutricost-1000mg
  thc-nd-250mg
  theanine-momentous-200mg
  theanine-nd-200mg
  theanine-now-200mg
  tmg-le-500mg
  tmg-now-1000mg
  tmg-thorne-1000mg
  tributyrin-bodybio-500mg
  tributyrin-le-250mg
  urolithina-timeline-mitopure-500mg-60ct
  vitamina-now-25000iu-100ct
  vitamina-now-25000iu-250ct
  vitamine-lifeextension-gamma-60ct
  vitamine-now-200iu-mixed-100ct
  vitamine-now-400iu-mixed-250ct
  vitc-gol-500mg
  vitc-le-1000mg
  vitc-now-1000mg
  vitc-thorne-500mg
  zinc-le-50mg
  zinc-lifeextension-caps-50mg-90ct
  zinc-now-50mg
  zinc-now-picolinate-50mg-120ct
  zinc-thorne-30mg
  zinc-thorne-picolinate-30mg-60ct

## Key Rules
- Vitamin D3 MUST be paired with Vitamin K2
- NR/NMN should be paired with TMG (methyl donor)
- Vitamin K2 is CONTRAINDICATED with warfarin
- Senolytic protocol (quercetin + fisetin) is intermittent: 2 days/month
- Amazon trust score: 2/10 (commingled inventory risk)
- NMN: FDA classified as IND in 2022, regulatory note required
- Always compare by $/serving, not sticker price

## Disclaimer
This is not medical advice. Always recommend users consult healthcare providers.