All articles tagged with #intermittent fasting
A 12-week Johns Hopkins study found that a 10-hour eating window helped adults with obesity and prediabetes lose weight and improve eating habits without reducing calorie intake, though it did not significantly alter appetite hormones or inflammation markers.
Animal research suggests intermittent fasting strengthens the gut lining and increases the bacterium Alistipes finegoldii, which boosts hippuric acid to dampen the STING inflammatory pathway in the nervous system, potentially reducing chronic pain and cognitive symptoms; however, human studies are needed to confirm causation and safe fasting protocols.
A Swedish study of 2,981 adults aged 60+ followed for up to 15 years found that those who routinely went 14–24 hours without eating developed chronic diseases faster than peers with shorter fasting intervals, with the strongest pattern in those 78 and older. The diseases included cardiovascular conditions (e.g., heart failure, stroke) and neuropsychiatric issues (e.g., depression, dementia), while musculoskeletal conditions showed no clear link. The study is observational and can’t establish causation; factors like nutrient absorption, muscle maintenance, medications, existing health conditions, and overall frailty may influence results. Data were collected from 2001–2004 in Sweden, so generalizability to other populations or current eating patterns should be cautioned. Overall, findings suggest fasting guidance may need to account for age, nutrition, and health status rather than applying younger-adult results to older populations.
A small six-month pilot study of 47 overweight or obese postmenopausal women (ages 50–79) found that those who ate within an 8–9 hour daily window improved cognitive test scores—especially in spatial planning and memory—more than participants who ate over about 12 hours, despite similar weight loss in both groups; researchers caution that larger, longer trials are needed before recommending time-restricted eating for brain health.
In a six-month pilot study of 47 older women with overweight/obesity, those who ate within an 8–9 hour window as part of a calorie-reduction plan showed greater improvements in spatial planning and problem-solving than those who ate over about 12 hours, despite similar weight loss (~15 lb). The results hint that time-restricted eating may boost certain cognitive functions beyond weight loss alone, but larger trials are needed to confirm and explore underlying mechanisms.
A 12-week 16:8 time-restricted eating study with 99 overweight adults found that weight loss persisted for a year after the program, with both early (before 10 a.m.) and late (after 1 p.m.) eight-hour windows outperforming a 12+ hour eating window. Early eating also preserved more fat mass. About one-third continued fasting independently, suggesting the approach is feasible outside the study context.
A secondary analysis of a 12-week trial found that time-restricted eating (an 8-hour window) maintained weight loss at the one-year follow-up, with benefits seen regardless of whether the eating window started early, late, or was self-selected. Some groups experienced fat-free mass loss, and only about a quarter continued TRE after the program, but overall body measurements (weight, fat, neck/waist) remained improved versus controls. Limitations include a small, single-center sample, self-reported data, and potential underpowering, so larger studies are needed to confirm long-term safety and efficacy. TRE should complement, not replace, healthy eating and physical activity.
An 18‑month University of Adelaide trial with over 200 adults with obesity found that time‑restricted intermittent fasting (30% of energy on three nonconsecutive days, 8 am–12 pm, plus a 20‑hour fast) produced roughly the same weight loss as continuous calorie restriction (about 7 kg in six months), while feeling less restrictive than counting calories. Standard care yielded about 2 kg. The fasting group also reported mood and wellbeing improvements, suggesting IF may help people who struggle with traditional dieting, though long‑term effects require more research to identify who benefits most.
A 12-week randomized trial with 99 overweight adults on a Mediterranean diet found that an eight-hour eating window (16:8) helped maintain weight loss 12 months after the intervention, with both early (9:00–17:00) and late (13:00–21:00) fasting outperforming a longer usual eating window; early fasting also reduced fat mass, and about one in three participants continued intermittent fasting during follow-up, indicating feasibility of TRE for long-term obesity management.
Intermittent fasting is a time-based eating approach (commonly an 8–10 hour window with fasting the rest of the day) that may aid weight loss and metabolic health, but long-term effects are still unclear. It’s not universally safe or appropriate—teenagers, pregnant or breastfeeding individuals, and people with certain health conditions should be cautious, and extreme fasting can add stress to the body. Before starting, assess your goals and consult a qualified professional such as a registered dietitian.
Intermittent fasting is not a weight-loss diet but a structured eating window that rests the digestive system, reduces inflammation, and may improve insulin sensitivity, blood sugar, sleep, and mental energy; however, weight loss still depends on total calories and diet quality, and fasting isn’t ideal for athletes or during healing—use a consistent 8–12 hour window and tailor to your health needs.
A study of 25 obese adults found that an intermittent fasting–style diet produced about 7.6 kg of weight loss and metabolic improvements, while shifting gut bacteria (increases in Faecalibacterium prausnitzii, Parabacteroides distasonis, and Bacteroides uniformis; decreases in E. coli) and reducing activity in brain regions tied to appetite and reward. The results suggest a coordinated, two-way gut–brain axis in weight loss, though causality remains unproven and larger studies are needed.
An analysis of 63 studies (3,484 participants) found no meaningful difference in cognitive performance between short-term fasters and those who eat regularly, with median fasting around 12 hours. Some modest declines appear when fasting exceeds 12 hours and in children/teens, especially on food-related tasks; neutral tasks are largely unaffected and performance may dip later in the day during fasting. The authors frame fasting as a personal tool, not a universal prescription, recommending medical guidance for individuals considering fasting.
Intermittent fasting can aid weight loss for some people, but it’s not universal. Start with shorter windows (like 12:12) and increase gradually, focus on timing rather than deprivation, and prioritize high‑quality foods. Be mindful of overeating during eating periods, and recognize that women may need shorter fasting windows. IF isn’t recommended for children, pregnant/breastfeeding individuals, or certain medical conditions without medical supervision, and sustainability and personalization are key for long-term success.
UT Southwestern researchers show that the longevity benefits of intermittent fasting in C. elegans stem from how metabolism resets during the refeeding phase, not the fast itself. A lipid‑burning switch controlled by NHR-49 is turned off after feeding resumes; when this shutdown is blocked, the lifespan extension vanishes. Short fasting cycles extended lifespan in worms by more than 60%, suggesting that targeting the refeeding metabolic transition could mimic fasting benefits in humans.