diff --git a/public.c77_dbh_get_vacuum_health.sql b/public.c77_dbh_get_vacuum_health.sql
index 772c97a..a163c08 100644
--- a/public.c77_dbh_get_vacuum_health.sql
+++ b/public.c77_dbh_get_vacuum_health.sql
@@ -1,6 +1,13 @@
 CREATE OR REPLACE FUNCTION public.c77_dbh_get_vacuum_health()
     RETURNS JSON AS $$
+DECLARE
+    v_has_pgstattuple boolean;
 BEGIN
+    -- Check if pgstattuple is installed
+    SELECT EXISTS (
+        SELECT 1 FROM pg_extension WHERE extname = 'pgstattuple'
+    ) INTO v_has_pgstattuple;
+
     RETURN (
         SELECT json_agg(
                        json_build_object(
@@ -32,7 +39,8 @@ BEGIN
                                'dead_tuples', dead_tuples,
                                'live_tuples', live_tuples,
                                'table_size', table_size::text || ' bytes',
-                               'bloat_estimate', bloat_estimate::text || '%'
+                               'bloat_estimate', bloat_estimate::text || '%' ||
+                                                 (CASE WHEN v_has_pgstattuple THEN ' (precise)' ELSE ' (estimated)' END)
                        )
                )
         FROM public.c77_dbh_vacuum_stats
diff --git a/public.c77_dbh_update_vacuum_stats.sql b/public.c77_dbh_update_vacuum_stats.sql
index a238332..fb5c1e1 100644
--- a/public.c77_dbh_update_vacuum_stats.sql
+++ b/public.c77_dbh_update_vacuum_stats.sql
@@ -1,6 +1,13 @@
 CREATE OR REPLACE FUNCTION public.c77_dbh_update_vacuum_stats()
     RETURNS void AS $$
+DECLARE
+    v_has_pgstattuple boolean;
 BEGIN
+    -- Check if pgstattuple is installed
+    SELECT EXISTS (
+        SELECT 1 FROM pg_extension WHERE extname = 'pgstattuple'
+    ) INTO v_has_pgstattuple;
+
     -- Insert or update vacuum stats for all user tables
     INSERT INTO public.c77_dbh_vacuum_stats (
         table_name, last_vacuum, last_autovacuum, vacuum_count,
@@ -29,12 +36,26 @@ BEGIN
             table_size = EXCLUDED.table_size,
             last_updated = EXCLUDED.last_updated;
 
-    -- Estimate bloat (simple heuristic for now; requires pgstattuple for precision)
-    UPDATE public.c77_dbh_vacuum_stats
-    SET bloat_estimate = CASE
-                             WHEN live_tuples + dead_tuples = 0 THEN 0
-                             ELSE ROUND((dead_tuples::numeric / (live_tuples + dead_tuples)) * 100, 2)
-        END
-    WHERE last_updated = now();
+    -- Update bloat estimate
+    IF v_has_pgstattuple THEN
+        -- Use pgstattuple for precise bloat if available
+        UPDATE public.c77_dbh_vacuum_stats v
+        SET bloat_estimate = ROUND(CAST(COALESCE(t.free_percent + t.dead_tuple_percent, 0) AS numeric), 2)
+        FROM (
+                 SELECT (pgstattuple(c.oid)).*
+                 FROM pg_class c
+                          JOIN pg_namespace n ON n.oid = c.relnamespace
+                 WHERE (n.nspname || '.' || c.relname) = v.table_name
+             ) t
+        WHERE v.last_updated = now();
+    ELSE
+        -- Fallback to heuristic bloat estimate
+        UPDATE public.c77_dbh_vacuum_stats
+        SET bloat_estimate = CASE
+                                 WHEN live_tuples + dead_tuples = 0 THEN 0
+                                 ELSE ROUND((dead_tuples::numeric / (live_tuples + dead_tuples)) * 100, 2)
+            END
+        WHERE last_updated = now();
+    END IF;
 END;
 $$ LANGUAGE plpgsql;
\ No newline at end of file