Understanding the Basics: Is Mayonnaise Keto?
Mayonnaise is traditionally an emulsion of egg yolk, oil, and an acid like vinegar or lemon juice. Given its high fat and virtually non-existent carbohydrate content, classic homemade mayonnaise is a perfect fit for the keto diet. However, the modern grocery store aisle tells a more complex story, particularly regarding ingredients in mass-produced products like Best Foods Real Mayonnaise.
The Verdict on Best Foods Real Mayonnaise
From a strict macronutrient perspective, Best Foods Real Mayonnaise fits the bill for keto. According to the brand's official information, its 'Real Mayonnaise' has 0 grams of carbohydrates and 0 grams of added sugar per serving. So, if you're only tracking net carbs, a small serving of Best Foods will not knock you out of ketosis.
However, for many following a 'clean keto' or whole-foods approach, the issue isn't the carb count but the source of the fat. The primary ingredient in Best Foods is soybean oil. While this is a fat source, many health-conscious individuals and keto advocates choose to avoid industrial seed oils like soybean, canola, and corn oil. These oils are high in omega-6 fatty acids, which can contribute to inflammation in the body when consumed in large quantities without a proper balance of omega-3s. They are also heavily processed and susceptible to oxidation.
Ingredients to Watch Out For
When evaluating any store-bought mayonnaise, keep an eye out for ingredients that don't align with a clean keto lifestyle. This includes:
- Industrial Seed Oils: Soybean oil, canola oil, corn oil, and sunflower oil are commonly used because they are cheap to produce, but they can be inflammatory.
- Added Sugars: Some flavored or low-fat versions may contain added sugars or high-fructose corn syrup, so always check the label.
- Modified Food Starch: This can add trace carbs and is another sign of a highly processed product.
- Artificial Preservatives: Cheaper brands may use artificial additives like calcium disodium EDTA to extend shelf life.
Comparison Table: Best Foods vs. Healthier Keto Mayos
| Feature | Best Foods Real Mayonnaise | Premium Keto Mayo (e.g., Chosen Foods) | 
|---|---|---|
| Primary Oil | Soybean oil | Avocado oil, MCT oil, or olive oil | 
| Carbs per Serving | 0g | 0g | 
| Added Sugar | 0g | 0g | 
| Processing | Highly processed | Minimal processing | 
| Healthier Fat Source | No | Yes, rich in monounsaturated fats | 
| Price | Inexpensive | Higher | 
| Flavor | Standard, classic mayo | Varied; some have a nuttier taste, others are neutral | 
How to Make Your Own Healthy Keto Mayonnaise
For complete control over your ingredients and to avoid inflammatory oils, making your own mayonnaise is the best solution. It is quick, easy, and requires just a few simple ingredients and a blender or immersion blender.
Homemade Keto Mayo Recipe
- Ingredients:
- 1 large whole egg, at room temperature
- 1 cup avocado oil or light olive oil
- 1 tbsp apple cider vinegar or lemon juice
- 1 tsp Dijon mustard
- Salt to taste
 
- Instructions:
- Combine the egg, mustard, vinegar, and salt in a tall, narrow jar or blender cup.
- Place the immersion blender on the bottom of the jar and turn it on. Blend until the mixture turns frothy.
- Keeping the blender running, slowly pour the oil in a thin stream. As the oil is added, the mixture will emulsify and thicken.
- Once all the oil is incorporated and the mayo is thick and creamy, turn off the blender. Add more salt or pepper to taste.
- Store in a sealed jar in the refrigerator for up to a week.
 
Keto Meal Ideas with Mayonnaise
Mayonnaise is an essential condiment for adding creamy texture and fats to many keto-friendly meals. Here are some ideas:
- Classic Salads: Use as a base for chicken, tuna, or egg salad.
- Deviled Eggs: A perfect, fat-filled snack.
- Creamy Dressings: Combine with herbs, spices, and a bit more vinegar to create homemade ranch or blue cheese dressings.
- Dips: Create a spicy dipping sauce by adding sriracha, chili powder, or garlic powder.
- Keto "Potato" Salad: Use it to bind together boiled cauliflower, hard-boiled eggs, and chopped celery for a low-carb version of the classic.
Conclusion
While Best Foods Real Mayonnaise is technically keto-friendly in terms of its macronutrient profile (0g carbs per serving), its reliance on processed soybean oil is a concern for those prioritizing whole, healthy fats. For a cleaner, more anti-inflammatory option, consider brands that use avocado or olive oil, or better yet, make your own homemade keto mayonnaise. Being an informed consumer and reading ingredient lists will help you align your condiment choices with your overall health goals. For more insight into healthy fats, check out this guide on 6 Best Keto-Friendly Cooking Oils.