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Diet and food › Seed Oils and the Heart › Studies

Randomized trial · measured lab tests or safety

3-month trial in 90 women: no clear weight difference across soybean, olive, camellia oils

Wu and colleagues · Food & function · 2022

Original title: Effects of n-6 PUFA-rich soybean oil, MUFA-rich olive oil and camellia seed oil on weight and cardiometabolic profiles among Chinese women: a 3-month double-blind randomized controlled-feeding trial.

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What the study found

No difference

Body weight did not differ between soybean, olive and camellia oil groups. Olive oil raised HDL cholesterol slightly (P = 0.03) vs soybean oil. Authors say the oleic-rich oils looked more favorable.

The study at a glance

Type of study
Randomized trial
Who or what was studied
90 people · middle-aged and older Chinese women at high heart risk
What was tested
Cooking with soybean oil vs olive oil vs camellia seed oil for 3 months
What it measured
Lab tests or markers
How long
13 weeks
Who has a stake
No disclosure in PubMed
No disclosure in PubMed.
Journal
Food & function, 2022
Source
PubMed record 35389391. This page is based on the abstract only.

How much this study counts

  • ✓Randomized: people were put into groups by chance, so the groups start out alike.
  • •Medium size: 90 people.
  • •Lasted 13 weeks.
  • –Measured lab tests or markers, which stand in for heart disease and inflammation. A better marker does not always mean better health.
  • •The PubMed record has no conflict-of-interest statement.
  • •Summarized from the PubMed abstract only. The full paper may hold details the abstract leaves out.

✓ Strength– Limit• Note

These points come from fixed rules about the type of study, its size and length, what it measured, and who has a stake. Every study on Digestery gets the same rules.

Where this study sits

Each dot is one on-topic paper on this question. Steps near the top answer the question more directly.

↑ Stronger evidence

  1. Trials in people: heart disease

    1

    1 harm

  2. Trials in people: other measures

    0

    None among the papers we read.

  3. Trials in people: lab tests or safety

    4

    1 benefit, 3 no difference

    ↑ This study is the ringed dot

  4. Population studies

    2

    2 mixed

  5. Blood levels and genes

    0

    None among the papers we read.

↓ Weaker evidence

  • Points to benefit
  • Mixed
  • No difference
  • No direction
  • Points to harm

How it fits with the other research

The short answer to “Are seed oils bad for your heart?”

Not clearly; the evidence conflicts.

Confidence: very low. Based on 13 on-topic papers.

Read the full answer

Of the other 3 papers on the same step: 1 benefit, 2 no difference. This one found no difference. It agrees with most of them.

Other papers on the same step

See all 13 studies on this question

How this page was made

Label

First read of the abstract
Claude Sonnet
Independent second read
Claude Haiku
Differences settled
The two reads differed. The reviewer checked the abstract and kept the first read. Claude Opus 5.5.
Headline
Claude Sonnet, from the checked study record. A script checked its numbers and wording.
Numbers
Checked against the abstract by a script
“How much this study counts”
Fixed rules, the same for every study
Source check by a person
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