diff -r 69a033e099a2 -r 62b8d701cd88 src/EditProduct.cpp
--- a/src/EditProduct.cpp	Fri Apr 29 17:07:35 2022 +0200
+++ b/src/EditProduct.cpp	Fri Apr 29 20:29:26 2022 +0200
@@ -341,6 +341,8 @@
 		    QJsonObject obj = fermentables.array().at(i).toObject();
 		    //qDebug() << i << obj;
 		    Fermentables f;
+		    f.f_inventory = 0;
+		    f.f_avail = false;
 		    f.f_name = obj["f_name"].toString();
 		    f.f_origin = obj["f_origin"].toString();
 		    f.f_supplier = obj["f_supplier"].toString();
@@ -366,6 +368,16 @@
 		    if (f.f_adjust_to_total_100)
 			product->fermentables_use100 = true;
 		    percentcheck += f.f_percentage;
+		    /* Check and update inventory */
+		    yquery.prepare("SELECT inventory FROM inventory_fermentables WHERE name=:name AND supplier=:supplier AND origin=:origin");
+                    yquery.bindValue(":name", f.f_name);
+                    yquery.bindValue(":supplier", f.f_supplier);
+                    yquery.bindValue(":origin", f.f_origin);
+                    yquery.exec();
+		    if (yquery.first()) {
+			f.f_avail = true;
+			f.f_inventory = yquery.value(0).toDouble();
+		    }
 		    product->fermentables.append(f);
 		}
 		qDebug() << "fermentables" << product->fermentables.size() << percentcheck;