⚕️ General information only — not medical advice. If pregnant or unwell, always follow the guidance of your midwife, GP or NHS 111. Full disclaimer

Yoghurt: Every Food Safety Answer

Written by Jordan Morley · Reviewed against NHS, FSA and USDA FoodKeeper guidance · Last updated 28 October 2026

This page pulls together the 6 yoghurt answers on the site: how long it keeps, whether you can freeze it, how long it can be left out, what the date on the label means and where it stands in pregnancy. The table gives the short answer for each; the page behind each row gives the full reasoning, the source and the exceptions.

In pregnancy: Yes — yoghurt is safe during pregnancy, including live/bio yoghurt, as long as it's made from pasteurised milk (all standard supermarket yoghurt is).

Worth knowing: Yoghurt is safe frozen, but the proteins and whey separate as it thaws. Greek-style (strained) yoghurt holds together better than thin set yoghurt.

Quick answers

QuestionShort answerFull answer
Can you eat it when pregnant?🟢 SafeYoghurt when pregnant?
How long does it last?🧊 1–2 weeks in the fridgeHow long does yoghurt (opened) last?
Can you freeze it?🟡 Yes — but texture changesCan you freeze yoghurt?
Left out overnight?🔴 No — throw it awayYoghurt left out overnight?
Past the date on the label?🟡 Check your label: use-by or best-beforeYoghurt after its use-by date?

More on yoghurt: pregnancy

🟢Greek Yoghurt when pregnant?

Questions people ask about yoghurt

Each question is answered in full on the page it links to.

❓Can I eat yoghurt in the first trimester?❓Is a small amount of yoghurt OK during pregnancy?❓I accidentally ate yoghurt while pregnant — what should I do?❓Can I eat greek yoghurt in the first trimester?❓Is a small amount of greek yoghurt OK during pregnancy?❓I accidentally ate greek yoghurt while pregnant — what should I do?❓How long does yoghurt (opened) last in the fridge?❓How can I tell if yoghurt (opened) has gone off?

Related foods and topics

→All dairy answers📋Milk: every answer📋Butter: every answer📋Cream: every answer📋Custard: every answer

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Yoghurt storage essentials

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Fridge thermometer

The right storage genuinely extends how long yoghurt stays at its best.

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Fridge thermometer

Safe storage times assume a fridge at 0–5°C — check yours actually is.

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Digital food thermometer

75°C in the middle answers both 'is it cooked?' and 'is it reheated?'.

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General information only, not medical advice: see the medical disclaimer. Feeling unwell after eating something? Contact NHS 111 or your GP.