Answer: At less than 1 g of net carbs, Hellman's mayonnaise is great for keto.
When it comes to condiments, America's favorite is Hellman's mayonnaise. Keto eaters love it because it's low in carbs, high in good fat, and makes keto recipes delicious.
One tablespoon of Hellman's has zero net carbs, meaning you don't have to worry about blowing past your daily carb limits. It also contains 11 g of fat, most of which is unsaturated fat that helps your body absorb other nutrients. Just avoid Hellman's Light Mayonnaise because it contains less fat and more sugar than the standard flavor.
If you're looking for an even more keto-compatible mayo, check out Primal Kitchen's Mayonnaise. It's zero net carbs and is 10% higher in fat than Hellman's.