Sulforaphane from broccoli and obesity-related metabolic health
What it found
In lab tests and animal studies, sulforaphane from broccoli improved many metabolic markers, but human studies are limited and do not show clear weight loss.
The authors say it is not yet proven as a weight-loss treatment.
What they found
Studies in people
Human studies on metabolism
Human studies are limited and varied, but they suggest possible improvements in blood sugar control, insulin sensitivity, blood vessel function, and other metabolic markers linked to obesity.
Weight and body fat in people
Evidence for meaningful reductions in body weight, body fat, or body composition in people remains limited and inconsistent. Improvements in metabolic markers do not prove less obesity-related illness or real fat loss.
Animal and lab studies
Fat cell formation in lab tests
In lab tests, sulforaphane blocked the development of fat cells and reduced fat buildup inside them. It also lowered oxidative stress and inflammation and improved how cells use energy.
Animal studies on body fat
In animal studies, sulforaphane reduced body fat, insulin resistance, fatty liver, oxidative stress, and chronic inflammation. It also improved energy use and metabolic flexibility.
Studies in people and animals
How it may work
Lab and animal studies suggest sulforaphane acts through several pathways, including activating Nrf2 and AMPK, blocking NF-kB inflammation, improving mitochondria, promoting fat burning, and changing gut bacteria.
Other findings
Factors affecting sulforaphane levels
How much sulforaphane gets into the body depends on myrosinase activity, food processing, gut bacteria, and differences between people. These factors make study results hard to compare.
What the authors conclude
“Current evidence provides strong mechanistic and preclinical support for sulforaphane as a promising candidate adjunctive nutritional intervention for improving obesity-associated metabolic dysfunction.”
Also in their conclusions
- They say current evidence gives strong mechanistic and preclinical support for sulforaphane as a promising add-on nutritional approach for obesity-related metabolic problems.
- They state that human evidence suggests possible metabolic benefits but does not establish sulforaphane as an effective weight-loss intervention or an evidence-based treatment for obesity.
- They call for large, long-term randomized controlled trials using standardized sulforaphane preparations and thorough assessments of body weight, body fat, metabolic health, and gut bacteria.
How it was done
Obesity is a major global health problem, and current treatments have limitations such as cost, side effects, and poor long-term adherence. The authors wanted to see whether sulforaphane and broccoli-based products could help with obesity-related metabolic problems.
The authors reviewed published studies on sulforaphane, glucoraphanin, or broccoli preparations and their effects on obesity, fat tissue, insulin resistance, inflammation, oxidative stress, and energy metabolism. They included lab studies, animal studies, human studies, and other reviews.
What it can’t tell you
- Most of the evidence comes from lab tests and animal studies, which cannot show what happens in people.
- Human studies so far are limited and varied, so they cannot prove that sulforaphane causes weight loss or treats obesity.
- The amounts of sulforaphane used in lab tests are often higher than what people get from eating broccoli or taking supplements.
Who paid
- Conflicts
- The authors declare no conflicts of interest.
- Authors work at
- University of the Aegean, Greece; International Hellenic University, Greece; General Hospital of Nikea-Piraeus, Greece
The paper
- Title
- Sulforaphane and Broccoli-Derived Preparations in Obesity and Obesity-Related Metabolic Dysfunction: Mechanistic Insights, Preclinical Evidence, and Clinical Perspectives
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people · animals · lab
- Summarised from
- Full text
- Licence
- CC BY. Words in quotation marks are the authors’; the rest is our summary.
- Cite
- Poulios E, Papadopoulou SK, Psara E, Tasoulas D, Giaginis C (2026). Sulforaphane and Broccoli-Derived Preparations in Obesity and Obesity-Related Metabolic Dysfunction: Mechanistic Insights, Preclinical Evidence, and Clinical Perspectives. Pharmaceuticals (Basel, Switzerland). doi:10.3390/ph19081244Free full textPubMed 42653741DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error