Ultraviolet rays break down the oil’s molecular structure, while high temperatures accelerate rancidity. These steps significantly slow down the oxidation process.
How Long Castor Oil Really Lasts and Stays Effective
A tightly sealed cap minimizes oxygen exposure, while transferring the oil to a smaller container reduces air space if the bottle is only partially full. These elements collectively determine whether the product remains effective or becomes a source of skin irritation.
Using clean, dry hands or a pump dispenser prevents introducing bacteria and water into the bottle. Keep the bottle in a cool, dark place away from windows and heating sources.
How Long Castor Oil Really Lasts Before Going Bad
Castor oil, a staple in both traditional medicine and modern cosmetics, often sits in bathroom cabinets for years. Each time the bottle is opened, oxygen interacts with the oil, gradually altering its chemical composition.
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