Citrus sinensis

Citrus sinensis has been studied in 3 papers since 2022: 2 trials and 1 observational study in people; 2 in the past year. The newest paper, Jun 30, 2026: “Flavonoid-rich foods, genetic risk, and female breast cancer risk: a prospective cohort study”.

Intervention

3 papers study it4 findingsUpdated

MeSH

See all 3 papers on citrus sinensis

At a glance

The findings reach people, from one lab or study. 1 lab in 1 country.

“GSH/GSSG ratio increased by 22.4% and 89.0% after 2 and 8 weeks of product intake.”
Antioxidant Efficacy of a Standardized Red Orange (Citrus sinensis (L.) Osbeck) Extract in Elderly Subjects: A Randomized, Double Blind, Controlled StudyNutrients2022doi:10.3390/nu14204235

None of its findings points the other way.

Humans: a single group. Cells, worms or flies and mice: nothing yet.
  • 1 lab in 1 country
  • 4 of 4 findings with company ties
  • Human trial2
  • Humans1

Studies in people

1 study gave citrus sinensis to people and measured what changed.

What changedDesignPeopleSource

up: Increases GSH/GSSG ratio+22.4% at 2 weeks, +89.0% at 8 weeks

down: Decreases TNF-alpha-2.5%

up: Improves wellbeing

Randomized trial8 weeks60 peopleall male (50%) and female (50%)aged between 45 and 60 years old (extremes included)Healthy adultsNutrients, Oct 11, 2022

What did studies of citrus sinensis find?

3

Studies of citrus sinensis measured 3 outcomes: GSH/GSSG ratio, wellbeing and TNF-alpha.

GSH/GSSG ratio

upin humans1

1 study
  1. Citrus sinensis increases GSH/GSSG ratio in humans (+22.4% at 2 weeks, +89.0% at 8 weeks).

    “Similar consideration can be drawn for the GSH/GSSG ratio that increased by 22.4% and 89.0% after 2 and 8 weeks of use, respectively.”

    Human trial8 weeksn = 60

    Antioxidant Efficacy of a Standardized Red Orange (Citrus sinensis (L.) Osbeck) Extract in Elderly Subjects: A Randomized, Double Blind, Controlled Study

    Nutrients

  2. Citrus sinensis increases GSH/GSSG ratio in humans (+89.0% at 8 weeks (+22.4% at 2 weeks)).

    “GSH/GSSG ratio increased by 22.4% and 89.0% after 2 and 8 weeks of product intake.”

    Human trialstandardized red orange extract8 weeksn = 60

    Antioxidant Efficacy of a Standardized Red Orange (Citrus sinensis (L.) Osbeck) Extract in Elderly Subjects: A Randomized, Double Blind, Controlled Study

    Nutrients

More on GSH/GSSG ratio

Wellbeing

upin humans1

1 study
  1. Citrus sinensis improves wellbeing in humans.

    “The obtained data suggest a positive effect of the test product in improving the QoL even if more data are needed to confirm or to improve the robustness of the obtained data.”

    Human trial8 weeksn = 60

    Antioxidant Efficacy of a Standardized Red Orange (Citrus sinensis (L.) Osbeck) Extract in Elderly Subjects: A Randomized, Double Blind, Controlled Study

    Nutrients

TNF-alpha

downin humans1−2.5%

1 study
  1. Citrus sinensis decreases TNF-alpha in humans (-2.5%).

    “In the active treatment arm, the basal (7.19 ± 0.07 pg/mL) concentration of TNF-a was statistically significant decreased by 2.5% (7.00 ± 0.09 pg/mL, p = 0.0335) after 8 weeks of use, respectively ( b), while do not was statistically significant in the placebo treatment arm.”

    Human trial8 weeksn = 60

    Antioxidant Efficacy of a Standardized Red Orange (Citrus sinensis (L.) Osbeck) Extract in Elderly Subjects: A Randomized, Double Blind, Controlled Study

    Nutrients

More on TNF-alpha

Latest

Dec 2025: 0Jan 2026: 0Feb 2026: 0Mar 2026: 0Apr 2026: 1May 2026: 0Jun 2026: 1Jul 2026: 0Aug 2026: 0Sep 2026: 0Oct 2026: 0Nov 2026: 02 papers in 12 months