The Lifespan Of Aromatherapy Oils: How Long Do They Last?

Aromatherapy oils are often used as a form of alternative medicine to improve health and well-being. However, essential oils do not last forever and will eventually expire. The shelf life of essential oils varies from oil to oil, with some lasting anywhere from one to eight years. Once opened, the oxidation process begins, and the oil's composition starts to change, reducing its strength and effectiveness over time. To extend the shelf life of essential oils, it is recommended to reduce their exposure to oxygen, light, and heat, and store them in a cool, dry, and dark place.

Aromatherapy oils oxidise and degrade over time

Aromatherapy oils, like all essential oils, do not last forever. They will oxidise and degrade over time, and there are several factors that can influence this process. Firstly, oxidation occurs when essential oils are exposed to oxygen, causing a chemical change in their composition. This is unavoidable, as essential oils will continuously come into contact with oxygen each time the bottle is opened. The oxidation process can cause a change in colour, scent, and consistency, and the oil may become less effective or even unsafe for use.

The rate of oxidation is influenced by temperature. According to the Arrhenius rate rule, for every increase of 18 degrees Fahrenheit (10 degrees Celsius), the oxidation rate doubles, halving the life of the oil. Therefore, keeping aromatherapy oils cool can help slow down the degradation process and extend their shelf life.

Contaminants such as dirt, water, and air can also accelerate the degradation of aromatherapy oils. Dirt containing fine metal particles can act as a catalyst, speeding up the oxidation process. Water and air can provide a source of oxygen, leading to increased oxidation and the formation of varnish, sludge, and sediment.

Additionally, exposure to light and heat can contribute to the degradation of aromatherapy oils. Storing oils in a cool, dry, and dark place, such as a kitchen or bathroom cabinet, can help protect them from these elements. Using dark-coloured glass containers can also provide better protection against ultraviolet light, slowing down the oxidation process.

The shelf life of aromatherapy oils varies depending on the specific oil, with some lasting one to two years and others up to eight years when stored properly. It is important to keep track of when bottles are opened and to dispose of expired oils safely. Expired aromatherapy oils may cause skin irritation and should not be inhaled or applied to the skin.

Pure essential oils vs fragrant synthetic oils

Aromatherapy oils can be essential oils or fragrant synthetic oils. While both types of oils are used for their scent, there are several differences between the two.

Pure Essential Oils

Essential oils are made from natural plant materials. They are highly concentrated liquid plant extracts, produced through steam distillation or solvent extraction. They are called 'essential' because they contain the essence of a plant. Aromatherapy essential oils are found in different parts of plants, including the leaf, stem, blossom, fruit, bark, wood, or resin.

Essential oils are used for their aromatic properties, as well as their healing and therapeutic benefits. They have been identified for use in three primary ways: as odorants, flavors, and medicines. They are ideal for scenting a room, and can be used in diffusers, massages, and therapeutic baths. They have been linked to several health benefits, including the same effects as antidepressants, helping provide natural assistance during pregnancy, and assisting with headaches and other small issues.

However, essential oils do have a shelf life, typically lasting anywhere from one to eight years. Over time, they start to lose their strength and effectiveness due to oxidation, which occurs when the oil comes into contact with oxygen, light, and heat. To extend their shelf life, essential oils should be stored in a cool, dry, and dark place, in opaque or amber-colored bottles.

Fragrant Synthetic Oils

Fragrant synthetic oils, on the other hand, are manufactured in a lab and designed to imitate the scent of a natural product. They are created from artificial chemical components that are not found in nature. Synthetic oils are often used in commercial products as they hold their fragrance for much longer than natural fragrances.

While synthetic oils may have a stronger and longer-lasting scent, they do not offer the same health benefits as essential oils. In fact, they can cause adverse reactions and health issues due to their synthetic nature. Synthetic fragrance oils have been linked to health risks such as hormone disruptors, respiratory issues, and allergens.

The average shelf life of a fragrance oil is anywhere from six to twelve months, but they can last longer if stored in a cool, dark place.

Diffusing oils vs burning oils

Aromatherapy is an ancient form of holistic therapy that has gained popularity in mainstream medicine. Aromatherapy involves inhaling essential oils to benefit well-being. Essential oils are concentrated extracts from fragrant plants like lavender, peppermint, and eucalyptus.

There are two main ways to inhale essential oils: diffusing and burning.

Diffusing Oils

Diffusing oils is a popular method that uses an electric diffuser to disperse essential oils into the air. This method is generally considered safer than burning oils, as there are no fire safety concerns. Diffusers use cold air dispersion methods, which may be preferred by those who want to avoid the potential health risks associated with burning oils.

Diffusing oils can be more cost-effective in the long run, as a single purchase of a diffuser machine can last a long time with proper care and maintenance. In contrast, candles need to be repeatedly purchased and contribute to waste.

Diffusers are also preferred when one wants to scent a space discreetly, as candles can be more noticeable and may not be suitable for all environments.

Additionally, diffusers can disperse fragrance throughout the day or as long as needed, whereas scented candles only release their scent while burning.

Burning Oils

Burning oils via scented candles is a traditional method of aromatherapy. While candles pose fire safety risks, they can create a cosy atmosphere that diffusers may not provide.

To ensure the safe use of scented candles, it is important to follow certain precautions:

• Choose candles made from high-quality, non-toxic ingredients, such as natural wax (soy or beeswax) and essential oils, avoiding synthetic fragrances and harmful additives.
• Trim the wick to about 1/4 inch before each use to prevent excessive soot and uneven burning.
• Never leave a burning candle unattended, and keep it away from flammable materials and drafts.
• Ensure proper ventilation in the room to prevent a buildup of indoor air pollutants.

Both diffusing and burning oils have their advantages and disadvantages. Diffusing oils may be preferred for safety, longevity of scent, and cost-effectiveness, while burning oils via scented candles can create a cosy and atmospheric environment but requires more care and attention. Ultimately, the choice between diffusing and burning oils depends on individual preferences, the desired ambiance, and the specific needs of the user.

Olfactory fatigue

While there is no sure way to prevent olfactory fatigue, there are strategies to reduce its effects. One simple method is to leave the area where you are exposed to the scent for a few minutes and then return. Regularly cleaning your space, opening windows for fresh air, and exercising to increase blood flow to your nose can also help reduce olfactory fatigue.

Proper storage methods

Aromatherapy oils are a great way to improve your health and well-being. However, essential oils do have a shelf life and will expire. To ensure your aromatherapy oils last as long as possible, proper storage methods are key.

Firstly, it is important to remember that essential oils do not like extreme or repeated changes in temperature. Therefore, they should be stored in a cool, dark place, away from direct sunlight and other sources of heat. The ideal storage place is a dark, cool cabinet or storage container. Never leave your oils in a place where the sun will shine directly on them, such as in a car or on a window shelf.

Secondly, the bottles your oils are stored in are important. Most essential oils are sold in amber or dark-coloured glass bottles as this provides better protection against ultraviolet light. Dark-coloured glass bottles also protect your oils from deterioration over time. If you have purchased an oil in a light-coloured bottle, consider transferring it to a tinted or opaque bottle.

Thirdly, reducing the amount of oxygen your oils are exposed to will help to slow down the oxidation process. Ensure that the cap of your oil bottle is always tightly screwed on and don't leave the cap off for long periods. Using smaller containers for your oils will also prevent oxidation from occurring.

Finally, it is important to remember that essential oils should not be ingested and to always do a patch test before trying a new oil.

By following these simple storage methods, you can help to extend the life of your aromatherapy oils and ensure their therapeutic properties are maintained.

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