Protein Style is In-N-Out’s famous low-carb ordering hack: your burger wrapped in crisp iceberg lettuce instead of a toasted bun. It’s not on the printed menu, but every cashier knows exactly what it means — and it costs nothing extra. For the full menu with prices, see our In-N-Out menu with prices (2026) guide.
What Is Protein Style at In-N-Out?
Protein Style replaces the standard toasted bun with a generous wrap of fresh iceberg lettuce leaves. Everything else stays the same — the same never-frozen beef patty, the same melted American cheese, lettuce, tomato, onion, and spread. It’s the go-to order for keto dieters, low-carb eaters, and anyone avoiding gluten in the bun.
Unlike some secret menu items, Protein Style is completely mainstream at this point: it’s listed on In-N-Out’s own “Not So Secret Menu” page, so you never have to explain what it is.
How to Order Protein Style (Step by Step)
- Pick any burger. Hamburger, cheeseburger, Double-Double, 3×3, 4×4 — all of them can be made Protein Style.
- Say “Protein Style.” As in: “Double-Double, Protein Style.” That’s the whole script.
- Add your customizations. Grilled onions, extra tomato, pickles, no spread — everything still applies.
- Grab extra napkins. The lettuce wrap is refreshing but messier than a bun. Eat over the tray.
Does Protein Style Cost Extra?
No. Protein Style is the same price as the regular burger — the lettuce swap is free. Typical 2026 prices (vary by location):
| Burger | Regular Price (2026) | Protein Style Price |
|---|---|---|
| Hamburger | ~$3.50–$3.85 | Same |
| Cheeseburger | ~$4.00–$4.35 | Same |
| Double-Double | ~$5.00–$6.25 | Same |
| 3×3 | ~$5.50–$8.40 | Same |
| 4×4 | ~$6.50–$10.55 | Same |
Protein Style Calories
Dropping the bun saves roughly 140–150 calories and about 30g of carbs. Approximate 2026 numbers:
| Burger | Regular | Protein Style |
|---|---|---|
| Hamburger | ~390 cal | ~240 cal |
| Cheeseburger | ~480 cal | ~280 cal |
| Double-Double | ~670 cal | ~440–520 cal |
Skipping the spread saves another ~80 calories. These are estimates — In-N-Out doesn’t publish item-by-item nutrition for every customization, so treat them as a guide.
Is Protein Style Keto? Is It Gluten-Free?
Keto: Yes — a Protein Style burger (hold the spread, or spread on the side) is one of the most keto-friendly fast food orders in America, with single-digit net carbs.
Gluten-free: The lettuce wrap itself contains no gluten, and many gluten-sensitive customers order it for that reason. But In-N-Out is not a certified gluten-free kitchen — buns are toasted on shared equipment — so those with celiac disease should use their own judgment. Our In-N-Out gluten-free guide goes deeper.
Protein Style Tips
- Combine it with Animal Style. A Protein Style burger, Animal Style (mustard-grilled patty, extra spread, pickles, grilled onions) is a staff favorite combo.
- Ask for extra lettuce. A sturdier wrap holds together better — free to request.
- Eat it fresh. Lettuce wilts fast; Protein Style is at its best in the first five minutes.
- Drive-thru works fine. Just say the words — no explanation needed.
Protein Style FAQs
What does Protein Style mean at In-N-Out?
Your burger wrapped in iceberg lettuce instead of a bun. Same fillings, same price, fewer carbs and calories.
Is Protein Style free?
Yes — swapping the bun for lettuce costs nothing extra. You pay the regular burger price.
How many calories are in a Double-Double Protein Style?
Roughly 440–520 calories, versus ~670 for the regular Double-Double — a saving of about 150–230 calories depending on toppings.
Can any burger be made Protein Style?
Yes — hamburger, cheeseburger, Double-Double, 3×3, and 4×4 can all be ordered Protein Style.
Is Protein Style on the official menu?
It’s not on the printed menu board, but In-N-Out lists it on their “Not So Secret Menu” page and every location knows the term.
