Material

Aluminium foil

Written by the VitaWhat editorial team · Medically reviewed by Steve Davis · Last reviewed 19 July 2026 · Editorial policy

A versatile wrap and cover — but not for acidic foods.

Typical storage time: Short-term wrapping; combine with an airtight box for longer

Best for

  • Covering dishes, wrapping for the oven/BBQ, freezer wrapping (double-wrap)

Avoid for

  • Wrapping acidic foods (tomato, citrus, vinegar) for long periods
  • Microwaves (sparks/fire)

Good to know

Acids and salt react with aluminium, causing pitting and a metallic taste. Never put foil in a microwave. The shiny/dull side makes no practical difference.

Sources & references

  1. UK Food Standards Agency — Storage & food dates
  2. NHS — How to store food safely
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