Argan oil has surged in popularity thanks to its reputation as a miracle elixir for hair, skin, and nails. A change in color, such as becoming noticeably darker.
Recognizing Sour Odor as a Key Clue to Expiration
Changes in viscosity, becoming overly thick or sticky. The Role of Oxidation The primary enemy of natural oils is oxidation, a chemical reaction that occurs when the oil is exposed to oxygen, light, and heat.
The best practice is to keep the oil in a cool, dark place, such as a cabinet or drawer, rather than on a bathroom counter where steam from showers can introduce moisture and heat. Dark glass bottles are the industry standard for a reason; they block harmful UV rays that can accelerate the degradation of the oil.
Recognizing the Sour Odor as a Clear Sign of Spoilage
Exposure to light, heat, and air are the primary causes of premature spoilage. Many reputable brands will include a "Period After Opening" (PAO) symbol on the bottle, which looks like a small jar with a number inside, indicating the number of months the product is safe to use after the cap is first removed.
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