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Does In-N-Out Burger use Toxic Preservatives?

Our latest 2025 audit of In-N-Out Burger analyzed 9 menu items. We found that 5 items (56%) contain high-risk preservatives.

56% Contain Toxins
4 Safe Options

Specific Ingredients Found:

Sodium benzoate

Want the list of 4 safe items?

We've identified exactly which menu items at In-N-Out Burger are Preservative Free. Download PRūF to see the full list.

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More questions about In-N-Out Burger

Does In-N-Out Burger use Seed Oils? Does In-N-Out Burger use Artificial Dyes? Does In-N-Out Burger use Bioengineered Ingredients? Does In-N-Out Burger use Erythritol?

View the full In-N-Out Burger ingredient audit

Learn more about additives

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Methodology & sources

We analyzed 9 menu items and matched ingredient statements against PRūF’s additive taxonomy. Counts reflect distinct menu items containing any flagged ingredient in this category. Data is sourced from publicly available In-N-Out Burger ingredient disclosures as of 2025-12-28.

People Also Ask

Our 2025 audit of In-N-Out Burger found that 5 menu items (56%) contain high-risk preservatives. Specific ingredients identified include: Sodium benzoate.
Yes, there are 4 items on the menu that are considered are Preservative Free. You can use the PRūF app to see the full list of safe options and filter the menu in real-time.

Audit based on In-N-Out Burger public ingredient data as of 2025-12-28.