How do you know if Mayonnaise (opened) has gone bad?

Yellow-brown colour, mould, oil separation; Sour, rancid, or tangy-off smell; Watery, curdled, or lumpy texture. Normal smell and appearance do not prove safety. Never taste food to check safety; consider storage history and product instructions.

How long does opened Mayonnaise (opened) last in the fridge?

Mayonnaise (opened) — refrigerator (after opening): 2–3 months. Exact evidence is still under review; follow the product label.

How Long Does Mayonnaise (Opened) Last?

Mayonnaise (Opened): 2–3 months in the refrigerator after opening. These are listed storage intervals; check each card for exact evidence and conditions. Freezer intervals describe quality.

2 cited USDA/FDA/FSIS sources
Editorial review · Editorial record: June 2026

Each card identifies whether its interval has an exact source or is still under review. A missing card means no interval is available for that state.
Unopened and after-opening entries are separate. Use only the tab that matches your product state.

Discard mayonnaise that has separated, darkened, or smells sour. Never leave mayonnaise-based dishes out for more than two hours.

How to tell if it's gone bad

Normal appearance and smell do not prove food is safe. Disease-causing bacteria may be present without visible spoilage. Never taste food to test its safety; follow time, temperature and recall guidance. FDA — Storage Basics

Look:Yellow-brown colour, mould, oil separation
Smell:Sour, rancid, or tangy-off smell
Texture:Watery, curdled, or lumpy texture

When in doubt, throw it out. If Mayonnaise (Opened) smells, looks, or feels off — discard it. Food poisoning is not worth the risk.

Storage tips

Always refrigerate opened mayonnaise and scoop with a clean utensil — crumbs and double-dipping introduce bacteria that shorten its life.

Check your storage dates

Compare the elapsed time with the storage guidance. This cannot certify that food is safe.

FDA — Storage Basics / Freezer Facts

Common questions

How long does opened Mayonnaise (opened) last in the fridge?: Mayonnaise (opened) — refrigerator (after opening): 2–3 months. Exact evidence is still under review; follow the product label.

Was this helpful?