Why shelf life matters
Skincare products are not meant to last forever. Over time, ingredients can break down, water-based formulas can grow bacteria or mold, and oils can go rancid. A product past its best may simply stop working as intended, or it may irritate skin that tolerated it before. Knowing how long things typically last, and how to tell when they have gone off, helps you avoid both waste and avoidable reactions.
Shelf life varies a great deal by formula and packaging, so treat the figures below as rough guidance, not rules. The label and the manufacturer’s instructions take priority.
Two kinds of dates
The expiry date
Some products, especially those sold with specific claims or in certain regions, carry an expiry or “best before” date. This applies to an unopened product kept in suitable conditions. Once you open it, that date no longer tells the full story.
The period-after-opening symbol
Many products show a small open-jar symbol with a number and the letter M, such as “12M”. It indicates roughly how many months the product is intended to remain good after it is first opened. That is a manufacturer’s estimate, not a measure of when a particular jar will spoil in your bathroom. A useful habit is to write the date you opened it on the container or a piece of tape.
Typical ranges
These are broad rules of thumb that vary by product, so check your labels.
- Cleansers and moisturizers in pumps or tubes: often last a year or more after opening, especially when the packaging limits air and finger contact.
- Products in open jars: these are exposed to fingers and air each time, so they may spoil sooner than the same formula in a pump.
- Products with active ingredients: some are less stable. Vitamin C formulas, for example, are often described as sensitive to light and air, so they may change more quickly than a plain moisturizer.
- Sunscreen: typically has an expiry date or period-after-opening symbol. Sunscreen that is past its date may not give the protection stated on the label, so it is not worth taking the risk with an old bottle. If you have sunscreen from last year that has been through heat in a car or beach bag, consider replacing it.
- Natural or minimally preserved products: formulas with fewer preservatives or lots of water may have a shorter life, and some brands recommend using them within weeks or a few months. Follow the label.
How to store products
Good storage will not make a product last forever, but it can slow deterioration.
- Keep them cool and out of direct sunlight. Heat and light can degrade ingredients and change textures. A drawer or cabinet is usually better than a sunny window ledge.
- Be careful in the bathroom. Steamy showers cause temperature and humidity swings. If your bathroom gets very warm and damp, a bedroom shelf or drawer may be a better place.
- Close lids tightly. Air exposure speeds up spoilage, particularly for products with sensitive ingredients.
- Use clean hands or a clean spatula. Dipping fingers into a jar can introduce bacteria. A small clean spatula, or a pump or tube, keeps the product cleaner.
- Never add water to thin out a product, and do not share products, particularly those used around the eyes.
- Keep products in their original packaging when it is designed to protect them, such as dark or opaque bottles and airless pumps.
Some people keep certain products in the refrigerator. That is not necessary for most items, and it may not suit all formulas, so do it only if the label suggests it. Very cold temperatures can also change some textures.
Signs a product has gone off
Check your products occasionally. Signs that a product may have spoiled include:
- Smell: a sour, rancid, metallic or otherwise unpleasant odor that was not there before. Oils that have gone rancid often smell like old crayons or stale nuts.
- Color: noticeable darkening, yellowing or patchy discoloration. Note that some active products change color as they oxidize, which usually means they are past their best.
- Texture: separation that does not mix back together when shaken, clumping, graininess, a watery layer, or a slimy feel.
- Visible growth: any specks of mold or cloudy spots.
- Performance and feel: it stings, burns or causes redness when it did not before.
Some formulas naturally separate and need a shake, so a slight change is not always a problem. If you are unsure, the cautious choice is to throw it away. A product that smells or looks wrong is not worth the risk of a reaction or infection, particularly near the eyes.
Special care for eye-area and makeup products
Products that touch the eye area deserve extra caution, because infections there can be more serious. Products used near the eyes are commonly replaced more often than those used on the rest of the face. If irritated eyes, swelling, discharge or pain develop after using a product, stop using it and seek medical advice.
Reactions to old products
If your skin suddenly reacts to a product you have used happily for a long time, it may be worth checking its age and condition. Irritation can have many causes, including changes in the skin barrier or weather, so an old product is not always the culprit. But removing a possibly spoiled product is an easy first step. If irritation lingers or worsens, speak with a pharmacist, doctor or dermatologist.
Reducing waste
Buying smaller sizes of products you are still testing, and avoiding stockpiling, helps you finish things before they age. Rotating items you use less often to the front of the drawer can help too. A routine of fewer products, used consistently, also tends to mean fewer half-empty bottles expiring in a cabinet.
Dispose of old products according to local guidance. Many containers can be recycled once emptied and cleaned, but rules vary by area.