Describe the Safety layer

README.md

@@ -60,3 +60,7 @@ print(len(hidden), "ingredients with doses hidden in proprietary blends")
 ## License
 
 Sample data: **CC BY-NC 4.0** — attribution, non-commercial. Full dataset commercially licensed at [suppdb.net](https://supplements-nootropics-suppdb.pages.dev); underlying facts are public-domain U.S. Government data (NIH DSLD + PubChem) — the license covers SuppDB's curated, normalized compilation. **Not medical advice** — always verify against the current physical label. Contact: `suppdb.doorframe589@simplelogin.com`.
+
+## Safety layer
+
+Beyond this catalog sample, a paid **Safety layer** is available, built on the same normalized mg doses: **8,800+ supplement x drug interactions** (each cited to its public-domain source and evidence-graded), per-product **% of the NIH tolerable upper limit** with over-limit flags, **condition contraindications**, and **WADA doping flags**. This sample includes a 30-row `interactions_sample.csv` teaser plus per-product safety columns (`product_max_pct_ul`, `product_over_ul_flag`, `product_interaction_count`). Full layer -> https://supplements-nootropics-suppdb.pages.dev