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Food identified:

• Blueberry muffin, gluten-free

Observed evidence:

• Text description states one blueberry muffin
• Described as gluten-free
• No label, size, or brand information provided

Estimated portions:

• Blueberry muffin: about 120 g

Estimated total:

• Calories: 420 kcal
• Protein: 6 g
• Carbohydrate: 58 g
• Fat: 18 g

Confidence:

• moderate

Assumptions:

• Assumed a standard medium bakery-style muffin
• Assumed gluten-free formulation with similar energy density to a typical blueberry muffin
• Assumed no additional spread, filling, or topping beyond a standard muffin

Uncertainty notes:

• Size could materially change the estimate, smaller muffins may be closer to 250 to 320 kcal, larger bakery muffins can exceed 500 kcal