diff --git a/iframe.html b/iframe.html
index b640f90..f874090 100644
--- a/iframe.html
+++ b/iframe.html
@@ -2239,11 +2239,13 @@ const CALCULATOR_CONFIG = {
                         state.foodSources.forEach(saved => {
                             // Back-compat: older Kaya state stored Fred & Felia as `chartType: "gc"`.
                             const chartType = saved.chartType === 'gc' ? 'mer' : (saved.chartType || null);
+                            const normalizedEnergy = chartType === 'mer' ? '115' : (saved.energy || '');
+                            const normalizedEnergyUnit = chartType === 'mer' ? 'kcal100g' : (saved.energyUnit || 'kcal100g');
                             const fs = {
                                 id: saved.id || this.generateFoodSourceId(),
                                 name: saved.name || 'Food Source',
-                                energy: saved.energy || '',
-                                energyUnit: saved.energyUnit || 'kcal100g',
+                                energy: normalizedEnergy,
+                                energyUnit: normalizedEnergyUnit,
                                 percentage: typeof saved.percentage === 'number' ? saved.percentage : 0,
                                 isLocked: !!saved.isLocked,
                                 chartType: chartType,
@@ -2796,7 +2798,7 @@ const CALCULATOR_CONFIG = {
                 const container = document.getElementById('foodSources');
                 if (!container) return;
 
-                const isChart = foodSource.chartType === 'kibble';
+                const isChart = foodSource.chartType === 'kibble' || foodSource.chartType === 'mer';
                 const energyReadonlyAttr = isChart ? 'readonly' : '';
                 const energyTitle = isChart ? 'Chart-based food: kcal locked' : 'Enter energy content';
                 const unitDisabledAttr = isChart ? 'disabled' : '';
diff --git a/src/js/calculator.js b/src/js/calculator.js
index ead1f53..9ccdce3 100644
--- a/src/js/calculator.js
+++ b/src/js/calculator.js
@@ -131,11 +131,13 @@
                         state.foodSources.forEach(saved => {
                             // Back-compat: older Kaya state stored Fred & Felia as `chartType: "gc"`.
                             const chartType = saved.chartType === 'gc' ? 'mer' : (saved.chartType || null);
+                            const normalizedEnergy = chartType === 'mer' ? '115' : (saved.energy || '');
+                            const normalizedEnergyUnit = chartType === 'mer' ? 'kcal100g' : (saved.energyUnit || 'kcal100g');
                             const fs = {
                                 id: saved.id || this.generateFoodSourceId(),
                                 name: saved.name || 'Food Source',
-                                energy: saved.energy || '',
-                                energyUnit: saved.energyUnit || 'kcal100g',
+                                energy: normalizedEnergy,
+                                energyUnit: normalizedEnergyUnit,
                                 percentage: typeof saved.percentage === 'number' ? saved.percentage : 0,
                                 isLocked: !!saved.isLocked,
                                 chartType: chartType,
@@ -688,7 +690,7 @@
                 const container = document.getElementById('foodSources');
                 if (!container) return;
 
-                const isChart = foodSource.chartType === 'kibble';
+                const isChart = foodSource.chartType === 'kibble' || foodSource.chartType === 'mer';
                 const energyReadonlyAttr = isChart ? 'readonly' : '';
                 const energyTitle = isChart ? 'Chart-based food: kcal locked' : 'Enter energy content';
                 const unitDisabledAttr = isChart ? 'disabled' : '';