Does Subway Use Seed Oils?

Subway - seed oil analysis

If you’re wondering “does subway use seed oils,” here’s the short answer.

Yes, Subway uses seed oils. All Subway bread varieties contain canola and/or soybean oil. Many processed meats and most sauces also contain seed oils. The oil drizzled on sandwiches is a canola-olive oil blend.

Which Seed Oils Are Used?

  • Canola oil
  • Soybean oil

Where Do They Appear on the Menu?

All bread varieties contain canola and/or soybean oil (gluten-free bread uses palm oil instead). Many processed meats contain seed oils. Most sauces contain seed oils. The oil drizzle is a canola-olive blend. Subway has more customization options than most chains for avoiding seed oils if you skip the bread.

What We Recommend Instead

A salad bowl with grilled chicken, vegetables, cheese, and mustard is the least bad option. But the processed deli meats (turkey, ham, roast beef slices) are on the avoid list. Grilled chicken is your best protein here. Skip all bread, skip the oil drizzle, use only mustard or vinegar.

Clean swaps:

  • Salad bowl with grilled chicken, vegetables, cheese, and mustard
  • Cook chicken at home and pack your own lunch with approved fats

What Are Seed Oils?

Seed oils are vegetable oils extracted from seeds using chemical solvents, high heat, and deodorization. The most common ones are soybean oil, canola oil, corn oil, sunflower oil, safflower oil, and cottonseed oil.

They’re in most processed foods and restaurant kitchens because they’re cheap to produce at scale. Before the 1950s, Americans cooked with butter, tallow, and olive oil. Seed oils replaced all of them.

Why Do People Avoid Seed Oils?

Seed oils are high in omega-6 fatty acids. The typical American diet already has far more omega-6 than omega-3, and seed oils make that imbalance worse. Excess omega-6 is linked to chronic inflammation.

People who cut seed oils often notice differences in their skin, digestion, and joint pain. The easiest swap is cooking with olive oil, butter, coconut oil, avocado oil, or beef tallow instead.

Watch Out for These Label Tricks

Seed oils are just the start. When reading ingredient labels, also watch for:

  • “Natural flavors” – a catch-all term that can hide hundreds of chemical compounds. The FDA allows manufacturers to list almost anything under this label without disclosure. If a product needs “natural flavors” to taste good, the real ingredients probably aren’t doing much.
  • “Vegetable oil” – almost always means soybean oil. The word “vegetable” makes it sound healthy, but these oils come from seeds, not vegetables.
  • TBHQ – a synthetic preservative added to seed oils to extend shelf life. Found in Crisco, Pop-Tarts, Maruchan Ramen, and many fryer oils.
  • “And/or” oil blends – when a label says “canola and/or soybean and/or corn oil,” the manufacturer uses whichever seed oil is cheapest that week.

The Bottom Line

Subway has a few items that avoid seed oils, but most of the menu does not. Cooking at home with approved fats will always give you more control over what goes into your food.

Ready to Clean Up Your Diet for Good?

Cutting seed oils is a great first step, but it is just the beginning. A health coach can help you identify every hidden ingredient working against you and build a whole-food eating plan you can actually stick with. Book a free discovery call to see if coaching is right for you.

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Disclaimer: This information was researched and verified as of February 2026. Ingredients and recipes may change without notice. Always check current labels or ask restaurant staff for the most up-to-date information. This content is for informational purposes only and does not constitute medical advice.