Avocado has about 132 mg of a plant sterol, beta-sitosterol, per 173 g, roughly 44 times higher relative than most fruit.
See the scientific wording
Avocado fruit contains approximately 132 mg of beta-sitosterol per 173 g, which is approximately 44 times higher RELATIVE (ratio 44:1) than the beta-sitosterol content found in most fruit; the absolute beta-sitosterol content of most fruit and the absolute difference are not reported.
Not tested yet
No study measured the main part of this claim. No part of this claim has been tested yet.
Not tested yet
No study measured the main part of this claim. No part of this claim has been tested yet.
Parts of this claim
Avocado fruit contains beta-sitosterol.
Not testedNo studiesAvocado fruit contains about 132 mg beta-sitosterol per 173 g.
Not testedNo studiesAvocado fruit contains approximately 44 times more beta-sitosterol relative than most fruit.
Not testedNo studies
Evidence is judged against each part on its own, so a study that tests one part never counts as a verdict on the whole claim.
Avocado fruit uses a series of chemical steps to build a plant sterol called beta-sitosterol from small carbon pieces. The fruit keeps a lot of this finished sterol in its soft flesh instead of breaking it down. Most fruits build less beta-sitosterol or use it up faster, so their beta-sitosterol amount is much smaller. That difference makes avocado's beta-sitosterol level about 44 times higher relative to most fruits.
Score breakdown, mechanism chain, raw evidence, ideal studies needed
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Avocado has about 132 mg of a plant sterol, beta-sitosterol, per 173 g, roughly 44 times higher relative than most fruit.
Mechanism
1 studyAvocado fruit builds beta-sitosterol through a chain of chemical steps and stores a lot of it in its soft flesh. Other fruits run the same chain but end up with much less beta-sitosterol because they make less or use it up more. That is why avocado has about 44 times more beta-sitosterol relative to most fruits.
Avocado fruit uses a series of chemical steps to build a plant sterol called beta-sitosterol from small carbon pieces. The fruit keeps a lot of this finished sterol in its soft flesh instead of breaking it down. Most fruits build less beta-sitosterol or use it up faster, so their beta-sitosterol amount is much smaller. That difference makes avocado's beta-sitosterol level about 44 times higher relative to most fruits.
Acetyl-CoA molecules enter the mevalonate pathway and are converted through sequential enzymatic reactions into mevalonate, then isopentenyl pyrophosphate, then farnesyl pyrophosphate, and finally squalene.
Squalene is cyclized by squalene epoxidase and cycloartenol synthase into cycloartenol, the first sterol intermediate. A series of demethylations, isomerizations, and C-24 alkylation and desaturation reactions then convert cycloartenol into beta-sitosterol.
Avocado mesocarp cells operate this sterol biosynthetic pathway at high flux, producing beta-sitosterol and depositing it in the lipid-rich flesh. The fruit tissue maintains this beta-sitosterol pool with limited conversion to other sterol forms or breakdown.
Most fruits run the same general sterol pathway but produce lower amounts of beta-sitosterol per gram because they direct sterol intermediates toward other phytosterols or sterol conjugates, or they have lower total sterol biosynthesis. This lower accumulation in most fruit creates the 44:1 relative ratio when avocado is compared to them.
Evidence from Studies
Last searched 14h ago
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review and Meta-Analysis of Analytical Studies Measuring Beta-Sitosterol Content in Avocado Versus Other Fruits
Systematic search of analytical chemistry studies that quantify beta-sitosterol via GC-MS or HPLC in avocado and a representative sample of other fruits; pooled analysis of mean content per 100 g or per fruit.
Cross-Sectional Survey of Beta-Sitosterol Content in Avocado and Common Fruits
Collect multiple avocado samples and samples of most common fruits; quantify beta-sitosterol using validated GC-MS; compare means and calculate ratio.
In Vitro GC-MS Quantification of Beta-Sitosterol in Avocado and Comparator Fruits
Laboratory analysis: extract lipids from 173 g avocado and equal masses of several common fruits; quantify beta-sitosterol by GC-MS; calculate mg per 173 g and ratio.
Expert Narrative Review on Phytosterol Content of Fruits
Narrative review by lipid/nutrition experts synthesizing existing analytical data and providing expert interpretation.