diff --git a/src/claudeService.ts b/src/claudeService.ts
index d995cdc..7cb0592 100644
--- a/src/claudeService.ts
+++ b/src/claudeService.ts
@@ -47,19 +47,17 @@ function cacheNutrition(foodName: string, grams: number, info: NutritionInfo): v
  * Get detailed nutritional information for a food item using Claude AI
  * Uses in-memory cache to avoid repeated API calls for the same food/amount
  * @param foodName - The name of the food item
- * @param grams - Amount in grams
  * @returns Promise with nutritional information
  */
-export async function getNutritionInfo(foodName: string, grams: number): Promise<NutritionInfo> {
+export async function getNutritionInfo(foodName: string): Promise<NutritionInfo> {
   // Check cache first
-  const cached = getCachedNutrition(foodName, grams);
+  const cached = getCachedNutrition(foodName, 100);
   if (cached) {
-    console.log(`Using cached nutrition info for: ${foodName} (${grams}g)`);
+    console.log(`Using cached nutrition info for: ${foodName} (100g)`);
     return cached;
   }
 
-  console.log(`Fetching nutrition info from AI for: ${foodName} (${grams}g)`);
-
+  console.log(`Fetching nutrition info from AI for: ${foodName} (100g)`);
   try {
     const message = await anthropic.messages.create({
       model: 'claude-haiku-4-5-20251001',
@@ -67,7 +65,7 @@ export async function getNutritionInfo(foodName: string, grams: number): Promise
       messages: [
         {
           role: 'user',
-          content: `Provide detailed nutritional information for ${grams}g of ${foodName}.
+          content: `Provide detailed nutritional information for 100g of ${foodName}.
 
 IMPORTANT: Respond in Brazilian Portuguese (pt-BR).
 
@@ -108,7 +106,7 @@ Be concise but informative. Only include significant amounts of vitamins and min
     const nutritionInfo: NutritionInfo = JSON.parse(jsonMatch[0]);
 
     // Cache the result for future use
-    cacheNutrition(foodName, grams, nutritionInfo);
+    cacheNutrition(foodName, 100, nutritionInfo);
 
     return nutritionInfo;
 
diff --git a/src/index.ts b/src/index.ts
index 422f637..9d5e8de 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -367,15 +367,6 @@ const setupEventListeners = () => {
     }
   });
 
-  getInputById('gramAmount').addEventListener('change', () => {
-    previewCalories();
-    // Reload AI nutrition info with new amount if food is selected
-    if (selectedFood) {
-      const grams = parseFloat(getInputById('gramAmount').value) || 100;
-      loadAINutritionInfo(selectedFood.name, grams);
-    }
-  });
-
   getButtonById('add-food-btn').addEventListener('click', () => {
     if (getButtonById('add-food-btn').innerHTML === 'Add Food') {
       addFood();
@@ -623,12 +614,12 @@ function showAIContent(nutritionInfo: NutritionInfo) {
   }
 }
 
-async function loadAINutritionInfo(foodName: string, grams: number) {
+async function loadAINutritionInfo(foodName: string) {
   showAINutritionCard();
   showAILoading();
 
   try {
-    const nutritionInfo = await getNutritionInfo(foodName, grams);
+    const nutritionInfo = await getNutritionInfo(foodName);
     showAIContent(nutritionInfo);
   } catch (error) {
     console.error('Error loading AI nutrition info:', error);
@@ -648,8 +639,7 @@ function selectFood(food: FoodItem) {
   getButtonById('cancel-food-btn').style.display = 'inline-block';
 
   // Load AI nutrition info for the selected food
-  const grams = parseFloat(getInputById('gramAmount').value) || 100;
-  loadAINutritionInfo(food.name, grams);
+  loadAINutritionInfo(food.name);
 }
 
 async function setFoodToEdit(foodId: string) {