How can you tell if Curd / Dahi (store-bought, set, opened) has gone bad?

Signs that Curd / Dahi (store-bought, set, opened) has gone bad: Yeasty, beer-like aroma; Green, white, or fuzzy surface spots; Watery, with a sharp burning sourness. Still good if: Mildly increased sourness or a small pool of whey on top — stir back in.

What does the date label on Curd / Dahi (store-bought, set, opened) mean?

Curd / Dahi (store-bought, set, opened) usually carries a "Use By" date. The last date the manufacturer recommends for peak quality — for most foods this is still quality-based, not a safety cutoff (infant formula is the one exception). See our date-labels guide for the full breakdown.

Dairy

How long does Curd / Dahi (store-bought, set, opened) last?

Q: How long does Curd / Dahi (store-bought, set, opened) last?

In the fridge: 7–10 days. Sealed / unopened: Check date (unopened, typically ~15 days). Reseal the tub tightly and return it to the fridge right after each use; serve from a separate bowl rather than dipping spoons back in. Power cuts and frequent door-opening shorten its real life.

High confidence Safety concern

How long does Curd / Dahi (store-bought, set, opened) last? fridge 7–10 days. Plus spoilage signs, sources, and an unopened-vs-opened note.

Fridge

7–10 days

Pantry

Refrigerate only

Freezer

Not recommended

Sealed / unopened: Check date (unopened, typically ~15 days)

Signs Curd / Dahi (store-bought, set, opened) has gone bad

Yeasty, beer-like aroma.
Green, white, or fuzzy surface spots.
Watery, with a sharp burning sourness.

Still good if

Mildly increased sourness or a small pool of whey on top — stir back in.

Discard immediately if

Any fuzzy or coloured mold
Bulging lid or fizzing when opened
Sharp, bitter, or alcoholic smell

Why guidance varies

Commercial set curd uses standardised cultures and sometimes stabilisers, but once opened it is exposed to household microbes and temperature swings, so storage time depends on fridge temperature and clean handling.

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Sources for this answer

A USDA FoodKeeper — Opened yogurt and cultured dairy keep roughly 1–2 weeks refrigerated.
A FSSAI — Cold-storage and handling requirements for packaged fermented dairy.

Reviewed: 2026-05 · Rule: if manufacturer storage instructions are stricter than category guidance, the manufacturer instructions win.