Clear plastic bottles let in light and air, which makes the healthy parts of olive oil break down faster—so they’re not good for keeping olive oil fresh long-term.

Scientific Claim

Clear polyethylene terephthalate (PET) bottles accelerate the degradation of secoiridoids in extra virgin olive oil due to exposure to light and oxygen, making them unsuitable for long-term storage.

Original Statement

“a clear polyethylene terephthalate bottle, purposely chosen to prompt secoiridoid degradation through exposure to light and oxygen”

From study:Insight into the Storage-Related Oxidative/Hydrolytic Degradation of Olive Oil Secoiridoids by Liquid Chromatography and High-Resolution Fourier Transform Mass Spectrometry

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design cannot support claim

Appropriate Language Strength

association

Can only show association/correlation

Assessment Explanation

Based on abstract only - full methodology not available to verify. The claim reflects an experimental design choice and observed outcome without overstating causation or health impact.

Evidence from Studies

Supporting (1)

Insight into the Storage-Related Oxidative/Hydrolytic Degradation of Olive Oil Secoiridoids by Liquid Chromatography and High-Resolution Fourier Transform Mass Spectrometry

Cross-Sectional Study

In Vitro

2020 Nov 4

The study found that clear plastic bottles let in light and air, which makes the healthy parts of olive oil break down faster—so they’re not good for keeping olive oil fresh over time.

Contradicting (0)

No contradicting evidence found

Source Study

Insight into the Storage-Related Oxidative/Hydrolytic Degradation of Olive Oil Secoiridoids by Liquid Chromatography and High-Resolution Fourier Transform Mass Spectrometry

Score: 4

DOI: 10.1021/acs.jafc.0c04925

Similar Assertions

Storing olive oil in dark glass or a metal can helps keep its healthy compounds intact better than clear plastic bottles—metal cans produce the fewest bad breakdown products.

75%

When olive oil sits too long, its natural compounds break down into simpler molecules like tyrosol and 3-hydroxytyrosol, which are also found in other foods.

72%

When olive oil is stored for a long time with air or light, its natural healthy compounds break down into different chemicals, some of which are less beneficial.

72%