Perspective on fasting for metabolic health and longevity
This perspective argues that intermittent fasting or time-restricted eating may support weight loss and metabolic health in motivated overweight or obese patients without certain risk factors, but the evidence is limited and does not justify widespread adoption. [1]
Automatic summary · not editorially reviewed
The key findings
The authors state that benefits of fasting for metabolic health and longevity have not been proven in humans. [1]
The authors conclude that current evidence is limited and not sufficient to justify widespread adoption of fasting practices. [1]
Without individual risk factors such as frailty, osteoporosis or osteopenia, or an eating disorder, a trial of intermittent fasting or time-restricted eating is considered reasonable for motivated overweight or obese patients. [1]
The source at a glance
- Study type / format
- Perspective article (abstract only)
- Population / context
- Motivated patients who are overweight or obese and lack individual risk factors such as frailty, osteoporosis or osteopenia, or a current or historical eating disorder; general statements also concern humans.
- Summary based on
- Study abstract
- Original publication
- April 27, 2026
Fasting rationale and unproven human longevity
The authors state that humans have evolved mechanisms to survive periods of months or longer with zero calories. They suggest that intermittent low-dose exposure to the metabolic stress of fasting may activate pathways promoting metabolic health and longevity. However, they explicitly note that such benefits have not been proven in humans. The abstract presents this as their perspective on the current rationale and evidence base, not as established proof.
Supporting source [1]
Trial reasonable for some overweight or obese patients
In the absence of individual-level risk factors for potential harm, such as frailty, osteoporosis or osteopenia, or a current or historical eating disorder, the authors consider a trial of intermittent fasting or time-restricted eating reasonable for the motivated patient who is overweight or obese. The stated aim of such a trial is to promote weight loss and metabolic health. This is a perspective recommendation, not a demonstrated outcome from a trial reported in the abstract.
Supporting source [1]
Limited evidence and proposed study template
The authors conclude that the current state of evidence is limited and not sufficient to justify widespread adoption of fasting practices. They add that it is also not sufficient to exclude the possibility that fasting holds a key to a longer life. They provide a template for the types of studies needed to optimize fasting protocols and establish therapeutic proof of concept. In their opinion, mechanistic and multi-omics endpoints will be critical to understand potential mechanisms of benefit in humans, and pathways could ultimately be targeted with a fasting mimetic drug to obviate long-term adherence to onerous dietary restriction.
Supporting source [1]
How to interpret this
This is an abstract of a perspective article; the full text was not reviewed. The abstract reports no study design, sample, follow-up or measured outcomes. Statements about possible benefits, reasonable trials and future study needs are the authors' perspective, not demonstrated results.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Steinhauser ML, Fazeli PK. · europepmc.org · April 27, 2026