diff --git a/api/IsotopeDatabaseHandler.php b/api/IsotopeDatabaseHandler.php
index ee89e1d..851897d 100644
--- a/api/IsotopeDatabaseHandler.php
+++ b/api/IsotopeDatabaseHandler.php
@@ -28,19 +28,73 @@ class IsotopeDatabaseHandler
     }
 
 
-    public function updateProducts(array $products)
+    public function processProducts(array $products)
     {
+        $this->dbHandle->beginTransaction();
+
+        $sql = "SELECT * FROM `tl_iso_product`";
+        $stmt = $this->dbHandle->query($sql);
+        $dbProducts = $stmt->fetchAll(PDO::FETCH_ASSOC);
+
+        $sql = "SELECT * FROM `tl_iso_product_price`";
+        $stmt = $this->dbHandle->query($sql);
+        $dbProductPrices = $stmt->fetchAll(PDO::FETCH_ASSOC);
+
+        $dbProductsBySku = [];
+        foreach ($dbProducts as $prod) {
+            $dbProductsBySku[$prod['sku']] = $prod;
+        }
+
+        $dbProductsPricesByPid = [];
+        foreach ($dbProductPrices as $price) {
+            $dbProductsPricesByPid[$price['pid']] = $price;
+        }
+
         /** @var Product $product */
         foreach ($products as $product) {
-            $productId = $this->updateProduct($product);
-            $productPriceId = $this->updatePrice($product, $productId);
-            $this->updatePriceTier($product, $productPriceId);
+
+            if (array_key_exists($product->getCode(), $dbProductsBySku)) {
+                $dbProduct = $dbProductsBySku[$product->getCode()];
+                $dbPrice = $dbProductsPricesByPid[$dbProduct['id']];
+                $this->updateProduct($product, $dbProduct['id']);
+                $this->updatePriceTier($product, $dbPrice['id']);
+
+            } else {
+                $productId = $this->createProduct($product);
+                $productPriceId = $this->createPrice($product, $productId);
+                $this->createPriceTier($product, $productPriceId);
+            }
         }
+        $this->dbHandle->commit();
+    }
 
+    private function updateProduct(Product $product, $productDbId)
+    {
+        $shippingWeight = $product->getGrossWeight() !== '' ?
+            ($product->getNetWeight() !== '' ? $product->getNetWeight() : '') : '';
+
+        $sql =
+            "UPDATE `tl_iso_product` SET
+                tstamp = ".time().",
+                name = '".$product->getDescription()."',
+                description = '".$product->getExtraDescription()."',
+                shipping_weight = '$shippingWeight'
+             WHERE `id` = ".$productDbId;
+        $this->dbHandle->query($sql);
+    }
 
+    private function updatePriceTier(Product $product, $priceDbId)
+    {
+        $price = $product->getStandardSalesPrice() * (1 + Product::VAT);
+        $sql =
+            "UPDATE `tl_iso_product_pricetier` SET
+                tstamp = ".time().",
+                price = $price
+             WHERE `pid` = ".$priceDbId;
+        $this->dbHandle->query($sql);
     }
 
-    private function updateProduct(Product $product)
+    private function createProduct(Product $product)
     {
         $alias = 'exact-product-'.$product->getCode();
         $shippingWeight = $product->getGrossWeight() !== '' ?
@@ -101,7 +155,7 @@ class IsotopeDatabaseHandler
         return $this->dbHandle->lastInsertId();
     }
 
-    private function updatePrice(Product $product, $productDbId)
+    private function createPrice(Product $product, $productDbId)
     {
         $sql =
             "INSERT INTO `tl_iso_product_price` (
@@ -125,7 +179,7 @@ class IsotopeDatabaseHandler
         return $this->dbHandle->lastInsertId();
     }
 
-    private function updatePriceTier(Product $product, $productPriceDbId)
+    private function createPriceTier(Product $product, $productPriceDbId)
     {
         $price = $product->getStandardSalesPrice() * (1 + Product::VAT);
         $sql =
@@ -143,5 +197,4 @@ class IsotopeDatabaseHandler
         $this->dbHandle->query($sql);
         return $this->dbHandle->lastInsertId();
     }
-    
 }
\ No newline at end of file
diff --git a/api/apiUpdateProducts.php b/api/apiUpdateProducts.php
index 45b2f92..8eee6e7 100644
--- a/api/apiUpdateProducts.php
+++ b/api/apiUpdateProducts.php
@@ -7,6 +7,6 @@ $databaseHandler = new IsotopeDatabaseHandler();
 
 //echo $apiConnector->getAccessToken() . "\n";
 $products = $apiConnector->getProducts();
-$databaseHandler->updateProducts($products);
+$databaseHandler->processProducts($products);
 
 $b = 0;
diff --git a/api/tokenData b/api/tokenData
index d2c44ae..c8a357e 100644
--- a/api/tokenData
+++ b/api/tokenData
@@ -1 +1 @@
-{"access_token":"stampDE001.gAAAAHwOSGEkvQm9cR0GLsLKi-DF5HztPTxwFs1cElb0YqYwsA4Du2xEN2_QDZQaRP2S7JqojAxH7Pgh9bGX8aMk_w2Mc6E8Za3DfOCs5_IU89TUfIZfo-OlriYaWguDBjIhWDV7uyb0fyMk83Vplk4hffbmyTdvoTA1GbmvO9x-wEWYVAIAAIAAAAAMQCUSoZTK5-qcCHPI6G15WhlRHy2qHRJKJIJ3ugg6F95dz8Wq4oLsgD4Ej7n_9zloDUbYzABmiTMs6vu-wa4R3DjXmDtvZ5tFauTNTvlSVdbo-rT5rbHUo_LcdGTdE18njXZDBpK7K58cQXVq4zGxViUoqzrEu8aiqDhfwI93_pAXr1ABdwTj6sFxzeqRTAwIo2WVBG7uwzvYLQCrCUqpzxfxUgwH0FBbjEzcglBx56hNshomL4SNqbqqGIKaK1lNGOKz0jkxnuRdY0-nlBPsi0FN6goQDAE3wfKUFzj8DU0nyQAZhdedAtk4q3AT1mPnM9wuOxIwp3EXDeuYkiCIQNWSvU7WJJaWMqfRPrab86diQ5ffBxWDVc0HnpHgQVWr0peKvzLXS4lx5_pTgwLaJUurvlRbG0LI88x-qcMmGgbj2a54FaF93RrNOtHaheiGZh_CBDwqbT54vrFaxxwp-yNmYLVk2-2c70RUwobUInw9E_eR2RNPU9oHGQTMTQR9at_3jZ5dR68UyrY6BMCGJrqrTvSpXkmJNKhkjP9WHlWtz-dC-gt_m2cYaWifow76NAKHONyRk3-i6Qu3vKDc8vXyyi-RLeX6R0nLYV07p7yHsgSo2E8em5C6KdkHIQjJIanYyHUVf7noHJMuKIrrvaHBfdTuiC1ZbemwzPCsb7sdOftAb5vW3oxSEMmckuCVEROmeTyoZCDAV5oyecNAah73Sx7WLx87npWFhC0F71myL11vkWf5MSt8lQ-o-kZCt0Wws7h9KStVrb3mux9v","token_type":"bearer","expires_in":"600","refresh_token":"stampDE001.vhK0!IAAAANf_ePo7TNLoW4eBzZwdyynZfR7KhO8joJp6EgWw0pF58QEAAAFBqPStZfQ04DNGVJ23edCAkbZsdhwNjz3GfWOQoMaGhf3uoG8iydpqma1dDKY3MmFI5CNNxIKvpiN0jnvHqgi0g6O5QijAmgtB3_sVmzs4L0ODxGt3Befp2rJKu2MMBDySEJ_00XVZzBIKmZqVA6XUflZ7mfbotp22vTRbthYOMZlyz0OIT1leJKHfU8XYgB5Zzp8gPHxsSca93Kh3_3CQRp0ZoGR5YKSh1C2zw8QyVCBU_092gLonzTGHKlaIUd6nVT4oIhzXC9i9Dh7wL-9PSfk7m9OqJ7wX0h-p8wkO4bqjkSJofeglSrAvS3G1U8yo0QpxmJQW1FHsm-7q1s6w4O03LV9LsSZX93Wjm8mMq789tlZFZh7-MqO5_zQcwmgizMVDMbBsxPUMU1ITOrTYBAalNf9kyLvrGE-M4jhK_qQbGQ3FATy25U3QjoEQC9K_PWNyqY2XrzPDHSAoprI6hZxY9lYY71tDg3L10KB6BFXDM6bDj_oWa0BAI-TfO_cKRPhXxt9bAquWxhLYHNFdV-d0Il7FeRgI_Dmp7OsKYuFw6rrd6C8Vuz1AxuTaNT1G3V-ugUn5L-VV12JiLgMTTrBLK6OGh5fooDE3Li8tM7WiA5-K9HgP3Jsesdrl2O7ClBUFRrrhtiQINNgkLN1f","expiry_time":1657581261}
\ No newline at end of file
+{"access_token":"stampDE001.gAAAAADL6aOtBYXnf9oX8oo7QyrDQln7zJtt7sEaJn2dbvaous1UbSvppR1Ya3CqVAanUy1qRx9lkr6U7tCTjX318c4kxnm67dmQmPukEAWpbUjetTe4avA8UMx-J5ykAkUN1pNTB1R9y2GxDt4jCCL1bUZkCDq0HNKnjXkXhtwVBBKWVAIAAIAAAACReWmKSqdcD9GTilQlefKkIOXIV7IWN27Wv2H73pY06G6khyNvxDbfoWCF_ZKeaR6ncZJshOuZ6JzsMdBle7CuX3OE98277itx8n36aVyoxnbE40-dWv9XnFfteOHQfKsAnasF8q746fdxGhJdvxfZmv_99ncUwpuR-7UqePwshwsM0wBvPMI0gaEROyEHv1RwhrtCINJi92UlNNv5pJfD5MQIflZ_3xm1mxF_d-vXNMHASos3YciXA1BzCWTO5ouTRjxTz7PDXhQSrOHOudrPWuCxUa_vQ8i9RbtVxd8DUPRU7fheRGsfaTKwDo76IHYDx0ZP8_YhTaMYlEXKTJM-7qPmNiWZ6_M2J0BsytQtdyXcUP8H6W_S0e0yQ6Ds6Yt8XEfBUPFkyRXKcaL0Jix-YlAA2yRbqyM4g_ndN5R9oiJtrKUxbKEf8WXmmnAWL7yz4UTkgXP-zi7o_z-YvZcrCUHpcESF7chhEXh6C1OPb1XkfeqozFX-JSwO_FwcOsRktXxqT5OCnNeZ7tnaw7zGN8ETRnMCLAOKOueX6lBgOOrGszAJYSkegpl5ZLAQBPgGi3JDASo86xF-yc1zDRKcgIONnAFSatASdvdZen11JzedrCIPaUnXVIKLHOQSTIzqVKNp23yVMEbQfEFj4tFkHsLaiKVab6fMOJdQ5qNHNnoVAzKRhcvhyz3tP__g6BTgUm3C3awOHzu_1LFsZuApavWLf_jZRq6na5jWitCUgCy6Ib4vrBC6KaHqdHi1xb3NXfq3FGw_ZO1phMm2TSK7","token_type":"bearer","expires_in":"600","refresh_token":"stampDE001.vhK0!IAAAALosHRpQdPUuLdhX-jaECbgokkK2deGK7TFtE2UnTaF28QEAAAFEZACQo3HB6AUdD06dCUPbm6lVP-4OtC0-ypV5PXBpfcssApvgMeC5P3JVyqB88YJmy1mvOhlewxPBW5oimVSgoXwJRGTMr9CxgSQTRbfusoi4ZMxEE7pDdfx0W1YffbCUluwuq8-qrQtlALer-5nnUU8B699O_B9qMGAbyO94wapxDKIAX9ArcMQFBiSSflFJtMpGQvrdOI-UCPw-TQ7mKfFSKN6XpG9v8QIzgcxOd8oSt4cGlWVUD7bRMmCFUYkgv2OBMxdlvvJ6ETCkRqQ2B3ydY2XjLm_8_S7FOi7f6ZCck0d9mIY7sQoCAmM8G19fgWX4s02eLOSJ4pY7tLGwfPU0l-d1NZiCedhcDjUVugl3bF42F_LJuPTr2HEbU7Zqgfjh5LvlQrFxBpX9-fYCxGjQPU4pDg39s1BUlUKWADQuR_xZe7q4GyQHV9414B9qUWyf9sC5dYxYcWGEszm6TZyofybaFEK5N2tgGc8h3BbVayX4exUuY_B-bPBiv1uzfv_uDc0UKQ0VX__yyhvER5HQTSg8kGndXKJ3ReOvroXzzJOjZ1AOM5OnZCZZ9lyWGDZuyPJyoSb-W1DfVmiwUmclCxD-OCN7t_W1U1w3ZX4YiS7nANi7KpmFGo0ptcX7GwmyhCPk7jg8JUEyWEAp","expiry_time":1657629511}
\ No newline at end of file