Mini-review of intermittent and periodic fasting mechanisms and evidence
This mini-review describes proposed metabolic and nutrient-sensing mechanisms of intermittent and periodic fasting and reports short-term feasibility in pilot clinical studies, while long-term benefit and safety remain unproven. [1]
Automatic summary · not editorially reviewed
The key findings
The review says intermittent and periodic fasting shift metabolism from glucose breakdown to ketogenesis and activate AMPK and sirtuins while suppressing the mTOR/IGF-1 axis. [1]
Time-restricted eating and fasting-mimicking diets showed feasibility and short-term efficacy in pilot clinical studies, but long-term potential and durability remain unproven. [1]
The authors cite over-reliance on homogeneous animal models and insufficient high-quality long-term human trials as major research bottlenecks. [1]
The source at a glance
- Study type / format
- Mini-review (abstract)
- Population / context
- Intermittent and periodic fasting as described in a mini-review, including animal models and pilot clinical studies
- Summary based on
- Study abstract
- Original publication
- September 15, 2026
Proposed fasting mechanisms in this mini-review
The review describes intermittent fasting and periodic fasting as biologically plausible non-pharmacological interventions. According to the text, they trigger a shift from glucose breakdown to ketogenesis and activate conserved nutrient-sensing networks including AMPK and sirtuins, together with suppression of the mTOR/IGF-1 axis. The authors link this adaptive regulation to enhanced cellular repair, antioxidant defense and inflammatory homeostasis. They present these as mechanisms within a hierarchical framework that separates primary drivers from secondary consequences and speculative mechanisms.
Supporting source [1]
Claimed multi-system benefits and pilot clinical evidence
The text states that this adaptive regulation confers multi-system benefits covering metabolic improvement, neuroprotection, anti-tumor activity and healthspan extension. Clinically, time-restricted eating and fasting-mimicking diets showed feasibility and short-term efficacy in pilot clinical studies. The review explicitly says their long-term translational potential and the durability of benefits remain unproven. These are described associations and proposed effects, not established causal human lifespan benefits.
Supporting source [1]
Research bottlenecks and proposed agenda in this review
The authors list major bottlenecks: over-reliance on homogeneous animal models, insufficient high-quality long-term human trials, unresolved individual response heterogeneity, and the lack of validated non-invasive biomarkers and systematic long-term safety evidence. They aim to distinguish established knowledge from speculation and to propose a prioritized research agenda guiding future investigation toward precise clinical translation. This is a mini-review synthesis; the abstract does not report its own trial data, sample sizes or follow-up.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. The abstract reports no trial data, sample sizes or follow-up, and the long-term human benefit and safety of fasting approaches remain unproven according to the text.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Liu Y, Guo H. · europepmc.org · September 15, 2026