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Regulation of Appetite and Obesity · Journal article
Antioxidants · September 9, 2026
Raises a question worth testing. It does not answer one.
This is a narrative literature review that synthesizes mechanistic, in vitro, and in vivo studies on six phytochemicals (berberine, resveratrol, catechins, capsaicin, thymoquinone, phycocyanin) and the myokine irisin as potential multi-target regulators of metabolic pathways implicated in obesity. The review proposes a conceptual framework linking these agents to adipose tissue browning and metabolic reprogramming but does not report clinical trial outcomes or human efficacy data; it raises a hypothesis for therapeutic investigation rather than providing evidence of clinical benefit.
Narrative literature review. Obesity as a multifaceted metabolic disorder; no specific human patient population studied in this review.
Six phytochemicals and irisin modulate key signaling pathways including AMPK, PI3K/Akt/mTOR, SIRT1, Nrf2, and PPARγ These agents promote browning of white adipocytes, suppress de novo lipogenesis in hepatocytes, and enhance fatty acid oxidation in skeletal myocytes Co-targeting redox signaling and metabolic pathways via phytochemicals and irisin proposed as a strategy against obesity
Mechanistic and in vitro evidence predominates; in vivo human efficacy and safety not assessed
This review does not support clinical recommendation at present. Practicing clinicians should recognize it as a conceptual synthesis proposing mechanistic targets for future investigation, not as evidence for therapeutic use of these phytochemicals or irisin in obesity management.
A narrative review synthesizing mechanistic and in vitro evidence on phytochemicals and irisin as potential regulators of adipose tissue browning; raises a therapeutic strategy hypothesis but does not report clinical trial data or human efficacy outcomes.
As stated by the source record.
This review does not support clinical recommendation at present. Practicing clinicians should recognize it as a conceptual synthesis proposing mechanistic targets for future investigation, not as evidence for therapeutic use of these phytochemicals or irisin in obesity management.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
What is missing. This record has no reported figures. That is a gap in the analysis, not a judgement about the study.
Background: Obesity is a multifaceted metabolic disorder characterized by systemic disturbances, particularly impaired energy homeostasis, chronic low-grade inflammation, and mitochondrial dysfunction across the brain, gut, adipose tissue, and liver axes. Objectives: This review aims to examine the metabolic properties and molecular mechanisms of six key phytochemicals (berberine, resveratrol, catechins, capsaicin, thymoquinone, and phycocyanin) and the exercise-induced myokine irisin, and their roles in mitochondrial signaling and metabolic reprogramming. Sources of Evidence: A comprehensive literature search was conducted across major electronic databases, including PubMed, Web of Science, and Scopus, to identify relevant mechanistic, in vivo, and in vitro studies. Results: Both the selected phytochemicals and irisin act as multi-target regulators that modulate key signaling pathways, including AMPK, PI3K/Akt/mTOR, SIRT1, Nrf2, and PPARγ. These phytochemicals and irisin can drive cell- and tissue-specific metabolic reprogramming, promoting the browning of white adipocytes, suppressing de novo lipogenesis in hepatocytes, and enhancing fatty acid oxidation in skeletal myocytes. This synergistic metabolic reprogramming enhances thermogenesis and increases energy expenditure. Conclusions: Co-targeting redox signaling and metabolic pathways via phytochemicals and irisin offers a powerful strategy against obesity. This integrative framework restores multi-organ homeostasis, laying the groundwork for targeted metabolic therapies.
Taken from the source record, never inferred. Follow any of these and new work involving them reaches your briefing.