diff --git a/api/src/pcapi/core/offers/repository.py b/api/src/pcapi/core/offers/repository.py
index 74a51e054e8..b818f16c85c 100644
--- a/api/src/pcapi/core/offers/repository.py
+++ b/api/src/pcapi/core/offers/repository.py
@@ -250,6 +250,7 @@ def get_offers_details(offer_ids: list[int]) -> BaseQuery:
             .load_only(
                 models.Product.id,
                 models.Product.description,
+                models.Product.extraData,
                 models.Product.last_30_days_booking,
                 models.Product.thumbCount,
             )
diff --git a/api/src/pcapi/routes/native/v1/serialization/offers.py b/api/src/pcapi/routes/native/v1/serialization/offers.py
index 3569f1c66df..e4edce4adf0 100644
--- a/api/src/pcapi/routes/native/v1/serialization/offers.py
+++ b/api/src/pcapi/routes/native/v1/serialization/offers.py
@@ -269,20 +269,16 @@ def get(self, key: str, default: Any = None) -> Any:
             return [OfferStockResponse.from_orm(stock) for stock in offer.activeStocks]
 
         if key == "extraData":
-            if not offer.extraData:
-                extraData = OfferExtraDataResponse()  # type: ignore[call-arg]
-            else:
-                extraData = OfferExtraDataResponse.parse_obj(offer.extraData)
+            raw_extra_data = product.extraData if product else offer.extraData or {}
+            extra_data = OfferExtraDataResponse.parse_obj(offer.extraData)
 
-            # insert the durationMinutes in the extraData
-            extraData.durationMinutes = offer.durationMinutes
+            extra_data.durationMinutes = offer.durationMinutes
 
-            # insert the GLT labels in the extraData
-            gtl_id = offer.extraData.get("gtl_id") if offer.extraData else None
+            gtl_id = raw_extra_data.get("gtl_id")
             if gtl_id is not None:
-                extraData.gtlLabels = get_gtl_labels(gtl_id)
+                extra_data.gtlLabels = get_gtl_labels(gtl_id)
 
-            return extraData
+            return extra_data
 
         return super().get(key, default)