Here’s how consumers can keep their marijuana skin products fresh, potent, and pleasant to use — without much effort.

Light, heat, and oxygen are the three biggest culprits that degrade cannabinoids and fragrant terpenes over time. CBD and THC can lose their strength faster when exposed to air and light, which may dull the product’s effectiveness and change its scent or texture. To maintain potency, marijuana skin products should be stored in a cool, dark place with the caps tightly sealed after every use. Avoid leaving them near sunny windows, in hot bathrooms, or in vehicles where temperatures fluctuate.

Packaging also plays a key role. Opaque or amber bottles and airless pumps protect formulas from light and oxygen, while jars tend to invite more air and bacteria into the product. When using a jar, it’s best to use a clean spatula instead of fingertips to reduce contamination.

Labels provide important clues. Consumers should look for both expiration dates and the “PAO” (Period After Opening) symbol — the open-jar icon followed by a number like 6M or 12M. This indicates how long a product remains safe after being opened. Marking the open date on the bottom of the container can help track freshness. Sunscreens and SPF moisturizers are regulated differently and always display expiration dates. Once expired, they should be discarded to ensure full protection.

The formula also affects how the product should be stored. Oil-rich balms and terpene-infused serums are especially sensitive to heat and air. These aromatic compounds can oxidize or evaporate, changing their fragrance and consistency. Keeping them sealed and away from heat sources — especially in bathrooms or showers — helps maintain quality.

When it comes to refrigeration, most marijuana lotions and creams do best at room temperature (around 68–77°F or 20–25°C) in a dark cabinet. While chilling oil-based serums can slightly extend freshness, refrigeration can also cause separation or thickening. Sudden temperature changes may introduce moisture inside the container and accelerate spoilage. Consumers should follow the brand’s storage instructions and monitor texture or scent for signs of degradation.

Traveling with marijuana skincare requires extra care. High heat inside cars or checked luggage can destabilize preservatives and cause oxidation. It’s best to carry products in personal bags, use smaller airless travel containers if decanting, and always keep caps secured. If a product has been exposed to excessive heat, it should be inspected for changes in color, smell, or separation before applying.

Finally, knowing when to let go of an old product is key. If the cream or serum darkens, separates, smells “off,” or feels irritating on the skin, it’s time to replace it — even if the expiration date hasn’t passed. In the case of SPF products, expired formulas should never be used, as reduced protection compromises skin safety.

Bottom line: Minimize light, heat, and air exposure, use clean application tools, and pay attention to expiration symbols. With a few mindful storage habits, marijuana skincare products can stay fresh, potent, and effective much longer.