Can You Reheat Spinach?
Reviewed against FSA/NHS reheating guidance · Updated September 2026
Nutritional data sourced from USDA FoodData Central and Public Health England. Always consult a registered dietitian for personal dietary advice.
Yes, you can reheat spinach safely — once, until piping hot. The old warnings about reheating vegetables are myths.
What makes it safe (or not)
Reheating spinach is safe. You may have heard that vegetables like spinach or beetroot become dangerous when reheated because of nitrates — food safety agencies consider this a myth at normal dietary levels for adults; the nitrate caution applies mainly to preparing food for young babies. Follow the standard rules — cool within 2 hours, refrigerate, use within 3 days, reheat once until piping hot — and reheated spinach is fine.
You can also check the calorie content of spinach alongside its safety information.
How to reheat spinach safely
- Cool spinach within 2 hours of cooking and refrigerate in a sealed container.
- Use within about 3 days.
- Reheat with a splash of water, covered, until steaming hot throughout — 75°C (165°F).
- Eat immediately and don't reheat again.
💡 Pro tip: a digital probe thermometer settles "is it hot enough?" in three seconds — 75°C in the middle means done.
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Reheat with confidence
Digital food thermometer
Steaming hot means 75°C in the middle — a probe tells you in seconds.
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Traps steam so food heats evenly — the main cause of cold spots is dry heating.
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Shallow, microwave-safe portions cool faster and reheat more evenly.
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More kitchen essentials
Oven thermometer
Oven temperatures drift — a thermometer keeps cooking accurate.
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Common questions
Isn't reheating spinach dangerous because of nitrates?
For healthy adults, no — the nitrate warning is a persistent myth at normal dietary levels. The caution about reheated high-nitrate vegetables applies mainly to food prepared for babies under about 12 months.
Can you reheat spinach twice?
The once-only rule applies to all reheated food, spinach included.
Can you reheat spinach in the microwave?
Yes — covered, with a splash of water, stirring once. It's the quickest way to get vegetables piping hot without overcooking.
Can you eat spinach cold?
Yes — properly stored cold cooked vegetables are fine within 3 days, straight from the fridge.
Related answers
Primary source: FSA/NHS reheating guidance.
The information on 247foodcheck.com is compiled from official public guidance (NHS, Food Standards Agency, USDA/FDA FoodKeeper) and is provided for general information only. It is not medical advice and does not replace guidance from your midwife, GP, health visitor or other qualified professional. When in doubt, throw it out — and if you feel unwell after eating something, contact NHS 111 or your doctor.