護膚品保存期限點睇｜開封後仲可以用幾耐

樽底寫住36個月,係咪即係可以放足三年?

買護膚品嘅時候,好多人都會留意樽身上面標示嘅有效期限,但其實呢個日期只反映「未開封」情況下嘅保存期,一旦開封使用,實際可以用嘅時間可能會短好多。如果唔清楚呢個分別,好容易用過期或者變質嘅產品都唔知。

When buying skincare, many people check the date printed on the packaging — but that date only reflects the unopened shelf life. Once a product is opened, the actual usable period can be much shorter. Without understanding this distinction, you could end up using an expired or degraded product without realising it.

PAO標誌:開封後嘅真正「死線」

留意樽身有冇一個開蓋小罐仔嘅圖案,裡面通常會寫住「12M」、「24M」呢類數字加M字,呢個就係PAO(Period After Opening,開封後使用期限)標誌,代表產品開封之後喺幾多個月內使用會比較理想。呢個標籤主要適用於保質期超過30個月嘅產品,同埋成分接觸空氣之後就會開始出現變化。

Look for a small open-jar icon on the packaging, usually with a number like "12M" or "24M" — this is the PAO (Period After Opening) symbol, indicating the ideal number of months to use a product after opening. This labelling typically applies to products with a shelf life over 30 months, since ingredients start to change once exposed to air.

唔同質地嘅保存注意事項

精華、乳液呢類質地嘅保存期一般會受配方成分影響,例如含高濃度活性成分嘅精華,建議儘量喺開封後12個月內用完,並存放喺陰涼、避免陽光直射嘅地方。以BARR 積雪草舒緩凝膠精華為例,啫喱狀質地開封之後要留意樽蓋緊閉,避免空氣長時間直接接觸,減慢氧化速度。保濕精華液例如By Wishtrend 藍洲蘆薈保濕精華液,亦建議避免放喺浴室蒸氣多、溫差大嘅環境,以免影響質地穩定性。

Storage needs vary by texture and formula — serums with high-concentration actives are generally best used within 12 months of opening, and should be kept somewhere cool and away from direct sunlight. For BARR Centella Calming Gel Essence, make sure the cap is tightly closed after opening to limit prolonged air exposure and slow oxidation. Hydrating serums like By Wishtrend Blue Oasis Aloe Hydrating Serum are also best kept away from steamy, temperature-fluctuating environments like bathrooms, to help maintain texture stability.

幾個判斷產品有冇變質嘅小貼士

• 留意質地有冇明顯分層、變得水狀或者出現異常顆粒。
• 氣味有冇同啱啱開封時明顯唔同,例如出現酸味或者刺鼻味。
• 顏色有冇變深或者出現不均勻嘅色斑。

A few tips for spotting whether a product has degraded: check whether the texture has separated, become watery, or developed odd particles; notice whether the smell has changed noticeably from when it was first opened, such as a sour or sharp scent; and check whether the colour has darkened or become uneven.

護膚品保存,呢幾個常見迷思要留意

• 迷思一:只要未過樽身標示嘅有效日期,開封幾耐都可以照用 — 樽身日期同PAO開封後使用期限係兩件事,即使未到有效日期,開封太耐一樣有可能已經變質。
• 迷思二:放落雪櫃就可以無限期延長護膚品壽命 — 部分配方唔適合低溫環境,冷藏反而可能令質地分離或者變得唔穩定,唔係所有產品都啱雪藏保存。
• 迷思三:淨係聞下有冇異味,冇怪味就等於冇變質 — 質地變水狀、出現顆粒或者顏色變深,一樣係變質嘅重要指標,唔可以單憑氣味一項就下結論。

Common myths about skincare storage: Myth 1 — as long as the printed expiry date hasn't passed, it's fine to keep using an opened product indefinitely; the printed date and the PAO period-after-opening are two different things, and a product can degrade after being open too long even if the printed date hasn't passed. Myth 2 — putting products in the fridge extends their life indefinitely; some formulas don't suit cold storage and refrigeration can actually cause separation or instability, so not every product benefits from being chilled. Myth 3 — as long as there's no odd smell, the product hasn't gone bad; a watery texture, odd particles, or darkened colour are equally important signs of degradation, so smell alone isn't enough to judge by.

常見問題 FAQ

• Q: 未開封嘅護膚品可以放幾耐?
  A: 一般會參考包裝上嘅有效日期,大部分護膚品未開封嘅保質期由18個月到36個月唔等,建議存放喺陰涼乾爽、避免陽光直曬嘅地方。
  Q: How long can unopened skincare last? A: Generally follow the expiry date on the packaging — most unopened products have a shelf life of 18 to 36 months. Store them somewhere cool, dry, and away from direct sunlight.
• Q: 精華開封之後可以用幾耐?
  A: 視乎具體產品同PAO標示,一般建議喺6至12個月內用完,如果超過呢個時間仍未用完,建議留意質地同氣味有冇變化。
  Q: How long can I use a serum after opening? A: This depends on the specific product and its PAO label, but a general guideline is 6 to 12 months. If you haven't finished it by then, check whether the texture or scent has changed.

用得其法,先可以充分發揮產品效用

了解PAO標誌同正確保存方法,可以幫助你更有效咁使用手上嘅護膚品,唔會浪費埋一直放喺化妝枱嘅產品。無論係凝膠精華定係保濕精華液,記得開封之後儘快用完,先可以享受到最佳狀態。

Understanding the PAO symbol and proper storage can help you get the most out of your skincare, instead of letting products sit unused on your vanity. Whether it's a gel essence or a hydrating serum, aim to use it up soon after opening to enjoy it at its best.