Dietary factors, hormesis and health.
Level 5 - mechanism / opinion, no new human data
Narrative review of cellular mechanisms and preclinical concepts with no primary clinical data.
PubMed 17913594 · doi:10.1016/j.arr.2007.08.004
What was done
This narrative review synthesized mechanistic concepts and experimental findings regarding how dietary energy restriction (caloric restriction and intermittent fasting) and specific dietary phytochemicals (such as sulforaphane, curcumin, allicin, capsaicin, and resveratrol) modulate health, disease resistance, and longevity through hormetic pathways.
What was found
The abstract reports no quantitative primary data or statistical metrics. It describes qualitative mechanistic pathways showing biphasic dose-responses, including activation of the Nrf2-ARE pathway by sulforaphane and curcumin, TRP ion channel activation by allicin and capsaicin, and sirtuin-1 activation by resveratrol, which upregulate cytoprotective proteins such as antioxidant enzymes, protein chaperones, growth factors, and mitochondrial proteins.
Why it matters
It provides a conceptual framework linking the health-promoting effects of dietary restriction and plant-derived compounds to cellular stress-adaptation mechanisms rather than direct antioxidant scavenging.
Limits
The review relies on preclinical, mechanistic, and cellular models with unspecified study counts. It does not provide human trial data, quantitative effect sizes, clinical safety thresholds, or kinetic dose-response parameters for therapeutic application.
Cited by
- supports Sulforaphane activates the Nrf2-ARE pathway, and that same pathway is activated by exercise and fasting.