Duke's® Mayonnaise Light. Based on a Family Recipe Since 1917. Half the fat & calories of regular mayonnaise*. *See side panel for nutritional information. Still 32 ounces. Good source of omega 3. ALA. Contains 280mg ALA per serving. 18% of the Daily Value of ALA (1600mg). Try all our Duke's varieties: Duke's, olive oil, mayonnaise light. Duke's, real mayonnaise, smooth & creamy. Duke's, tartar sauce. Per serving - This product. Calories - 50. Fat - 5g. Per serving - Regular product. Calories - 100. Fat - 12g. The secret to great food. Find recipes at dukesmayo.com.