# Deer Supply

> Deer Supply & Research (deer.supply) is a Canadian supplier of GLP weight-loss medications (Retatrutide, Tirzepatide and Semaglutide) as pre-filled, ready-to-use injection pens, plus recovery products and ancillary capsules. Ships within Canada only; prices in CAD.

Weight-loss figures below are averages from named clinical trials, not a prediction for any one person. Nothing here is medical advice.

## For AI agents

- MCP server (Streamable HTTP): https://deer.supply/api/mcp
  The catalog tools work without signing in. The account tools need a Deer account: calling one answers 401 with OAuth resource metadata, the person signs in on deer.supply with their email code and chooses what the agent may do (OAuth 2.1 with PKCE and dynamic client registration; metadata at https://deer.supply/.well-known/oauth-authorization-server).
  Catalog tools: search_products, get_product, compare_weight_loss_medications, estimate_weight_loss, quote_cart, create_cart_link, delivery_estimate, get_help, get_store_info, get_lab_results, get_trust_report, track_order.
  Account tools (sign-in required, as permitted): get_my_account, list_my_orders, get_my_health, log_weight, import_weights, report_side_effect, resolve_side_effect, set_health_emails.
- Agents cannot pay or place orders: create_cart_link returns a deer.supply link that opens the cart filled in, and the person checks out with their own details.
- Server card: https://deer.supply/.well-known/mcp/server-card.json
- How to connect, for people: https://deer.supply/agents
- Everything in one read (products, schedules, prices, FAQ, evidence): https://deer.supply/llms-full.txt

## Weight loss

- [Retatrutide Pen](https://deer.supply/products/retatrutide): Third-generation GLP. Triple-action weight loss for the biggest results. From $120 CAD.
- [Tirzepatide Pen](https://deer.supply/products/tirzepatide): Second-generation GLP. Powerful dual-action weight loss with proven performance. From $230 CAD.
- [Semaglutide Pen](https://deer.supply/products/semaglutide): First-generation GLP-1. The trusted GLP-1 that transformed weight loss. From $90 CAD.

Landmark trial averages: Semaglutide about 15% (STEP-1), Tirzepatide about 21% (SURMOUNT-1), Retatrutide about 28% (TRIUMPH-1).

- [Compare the GLP medications](https://deer.supply/compare)
- [Weight-loss calculator](https://deer.supply/calculator): trial averages at your weight
- [Find your medication](https://deer.supply/find)
- [Money-back policy for Retatrutide](https://deer.supply/guarantee)

## Other products

- [HGH Pen](https://deer.supply/products/hgh): 30-day beginner human growth hormone package for recovery, body-composition, and training-support goals. From $300 CAD.
- [KLOW Pen](https://deer.supply/products/klow): 30-day beginner recovery peptide package for a simple, structured recovery-support option. From $240 CAD.
- [SLU-PP-332 Pen](https://deer.supply/products/slu-pp-332): Research compound studied for exercise-mimetic and metabolic signaling; ordered for performance and recovery protocols. From $200 CAD.
- [MOTS-c Pen](https://deer.supply/products/mots-c): Mitochondrial-derived peptide studied for cellular energy, metabolic signaling, and exercise tolerance. From $190 CAD.
- [Enclomiphene 12.5mg](https://deer.supply/products/enclomiphene): Enclomiphene raises LH and FSH so the body makes more of its own testosterone. From $130 CAD.
- [Tadalafil 5mg](https://deer.supply/products/tadalafil): The low daily dose. Tadalafil widens blood vessels and supports erectile function, taken at the same time each day rather than before sex. From $60 CAD.
- [Finasteride 1mg](https://deer.supply/products/finasteride): The 1mg daily dose. Finasteride blocks the enzyme that turns testosterone into DHT, the hormone behind male pattern hair loss. From $65 CAD.

## Evidence

- Orders: 41 paid orders shipped since launch, 100% with carrier tracking, 100% confirmed delivered; the median order ships the day it is paid, then 2.4 days in transit.
- Weight outcomes (de-identified): among 12 customers charting their weight on a treatment plan, a median 8% weight loss over a median 14 weeks; 75% lost 5% or more. Self-reported, not a clinical trial; groups under 10 people are withheld.
- Third-party lab reports (COAs) for each pen size: https://deer.supply/lab-results
- Deer by the numbers (methods included): https://deer.supply/evidence · JSON: https://deer.supply/api/trust
- [Customer reviews](https://deer.supply/reviews) (moderated)

## Buying

- Shipping: free on orders of $100 CAD or more, otherwise $15 CAD. Orders by noon Eastern on a weekday ship that day; pens travel on the fastest service.
- [Shipping policy](https://deer.supply/legal/shipping) · [Refund policy](https://deer.supply/legal/refund-policy) · [Privacy](https://deer.supply/legal/privacy) · [Terms](https://deer.supply/legal/terms)
- [Track an order](https://deer.supply/track) · [Support and FAQ](https://deer.supply/support) · info@deer.supply
- [Deer AI](https://deer.supply/chat): the store's own assistant