Does Intermittent Fasting Help Menopause Night Sweats?

Does Intermittent Fasting Help Menopause Night Sweats?

A 12-week trial of 54 menopausal women found that adding 16:8 time-restricted eating to a twice-weekly exercise program improved overall menopause symptoms, mood, and quality of life more than exercise alone — but it did not significantly reduce hot flashes or night sweats specifically compared with exercise alone. In other words, fasting appears to help the broader menopause symptom picture more than it helps heat and sweating on their own.

Medical disclaimer: This article summarises published research for informational purposes only. It is not medical advice and is not a substitute for guidance from a qualified health professional. Always consult your doctor before starting any fasting protocol, especially if you have an existing health condition or take medication.

Study at a Glance

What This Study Looked At

Polish researchers wanted to know whether adding time-restricted eating to an exercise program helps menopausal women more than exercise on its own — specifically for the symptom cluster that includes hot flashes, night sweats, sleep disruption, and mood changes. Every woman in the trial did the same 12-week supervised circuit-training program; the only difference was whether she also followed a 16:8 eating window.

This matters because most fasting-and-hot-flashes advice online is based on anecdote, not a controlled comparison. This trial isolated the fasting variable against an active comparison group, rather than against people doing nothing at all.

Who Was Studied

Participant profile: All 54 participants were women in perimenopause, menopause, or postmenopause, most in their late 40s to late 50s. Eligible women were sedentary or only lightly physically active before enrolling. This is a 100%-female cohort by design — the trial did not include men, so nothing here speaks to how fasting affects night sweats in anyone else.

How 16:8 fasting worked in this study: Women in the combination group confined their food intake to an 8-hour window each day and fasted for the remaining 16 hours, choosing their own window timing. There was no calorie target beyond the eating-window rule itself — this was a timing intervention, not a diet plan.

The exercise protocol: Both groups did the same supervised, moderate-intensity resistance-and-endurance circuit training twice a week for 12 weeks, using eight exercise stations (cycle ergometer, abdominal crunch, leg curl, lat pulldown, elliptical, leg press, back extension, and leg abductor). Resistance load progressed from 50% of each woman's one-rep max in weeks 1–4, to 60% in weeks 5–8, to 70% in weeks 9–12, with endurance stations targeted to 64–76% of age-predicted maximum heart rate.

What the Researchers Found

Hot Flashes and Night Sweats (Vasomotor Symptoms)

• The two symptom scales told different stories. On the broader "somatic" symptom score — which lumps hot flushes and sweating together with sleep problems, joint and muscle aches, and heart discomfort — the fasting-plus-exercise group improved significantly more than exercise alone. But on the questionnaire scale built specifically to isolate hot flashes and night sweats, there was no significant advantage for fasting over exercise on its own.
• The most likely explanation: the improvement in that broader somatic bundle was probably being driven by sleep and joint/muscle symptoms rather than by hot flashes and night sweats themselves — which is exactly the kind of nuance that gets lost when a headline just says "fasting reduces menopause symptoms."

Overall Menopause Symptoms and Quality of Life

• Total score on the Menopause Rating Scale (MRS) fell significantly more in the combination group than the exercise-only group (p = 0.008).
• The MRS psychological subdomain (depressive mood, irritability, anxiety, exhaustion) improved significantly more with fasting added (p = 0.009).
• On the Menopause-Specific Quality of Life questionnaire (MENQOL), the physical subdomain (p = 0.013) and psychosocial subdomain (p = 0.002) were both significantly better in the combination group after 12 weeks.
• The exercise-only group showed no significant change on any of these measures across the 12 weeks — the training alone wasn't enough to move the needle in this trial.

What Did Not Change

• MENQOL vasomotor subscale (hot flashes, night sweats, sweating) — no significant difference between groups.
• MENQOL sexual subscale — no significant difference between groups.
• MRS urogenital subdomain — no significant difference between groups.
• Body composition and muscle mass were not measured in this particular analysis; a companion paper from the same 12-week trial reports those outcomes separately (Jóźwiak et al., Journal of Translational Medicine, 2024) — PMID: 39434160.

What the Researchers Concluded

The authors concluded that adding time-restricted eating to a structured exercise program produced greater improvements in overall menopausal symptom burden and quality of life than exercise alone — while stopping short of claiming that fasting specifically targets hot flashes and night sweats, since the dedicated vasomotor-symptom measure didn't show a fasting-specific advantage.

What This Means If You Fast

• Don't fast expecting it to fix hot flashes and night sweats specifically. On the measurement tool built to isolate vasomotor symptoms, adding fasting to exercise showed no advantage over exercise alone in this trial.
• The bigger win here was mood and overall symptom load, not sweating. If your main menopause complaint is irritability, low mood, or exhaustion rather than heat and sweating, this is where fasting-plus-exercise showed the clearest edge.
• Exercise did real work on its own — and consistently. Both groups trained twice a week; only the group that also fasted saw significant improvement, which suggests fasting was additive rather than a replacement for movement.
• Women specifically: this is one of the few controlled trials to test fasting in a purely menopausal female cohort rather than extrapolating from mixed-sex weight-loss studies — worth reading alongside fasting through perimenopause if hot flashes are your main concern, since this trial suggests fasting alone may not be the lever to pull for that symptom.
• If night sweats are disrupting your sleep, this study doesn't rule out a benefit from fasting, but it doesn't confirm one either — see what the current research on fasting and sleep says more broadly before assuming cause and effect.
• A 16:8 window plus twice-weekly structured exercise is a low-risk combination to try for general menopause symptom relief, independent of whether it moves hot flashes specifically.
• Fasting itself may not be a neutral variable for hot flashes. Older experimental research that directly manipulated blood glucose in menopausal women found that fasting conditions could help trigger the hot-flash mechanism (Menopause, 2003) — PMID: 14501548. That is a separate, older line of evidence, not a finding from this trial, but it is a plausible reason a fasting-specific vasomotor benefit didn't show up here.

Study Limitations

• Small sample, unequal group sizes: 24 women in the combination group versus 30 in exercise-only — a modest sample for detecting subtler effects, especially on a variable symptom like night sweats.
• Quasi-randomized, not true randomization: participants were quasi-randomly, not fully randomly, allocated to groups, which raises some risk of allocation bias compared with a strictly randomized trial.
• No untreated control group: every participant exercised; the comparison is fasting-plus-exercise versus exercise-alone, not fasting versus doing nothing, so this can't isolate fasting's effect in the absence of exercise.
• All-female cohort by design: every participant was a menopausal woman, which is a strength for answering this specific question but means the results say nothing about men or premenopausal women.
• Short duration for a variable symptom: 12 weeks is brief given that hot flashes and night sweats are known to fluctuate substantially month to month regardless of intervention.
• Self-reported symptom scales: both the MRS and MENQOL are self-report questionnaires; the study did not use objective physiological monitoring (such as skin conductance or ambulatory sternal skin temperature) to verify hot flash frequency or severity.
• Funding and conflict-of-interest disclosures could not be independently verified for this article, since direct PubMed and journal access was blocked at generation time.

Source

Jóźwiak, B., Szulc, A., & Laudańska-Krzemińska, I. (2025). Time-restricted eating combined with exercise reduces menopausal symptoms and improves quality of life more than exercise alone in menopausal women: A quasi-randomized controlled trial. Nutrients, 17(20), 3274. PMID: 41156526

Frequently Asked Questions

Does intermittent fasting help with hot flashes and night sweats during menopause?

In this 2025 trial of 54 menopausal women, adding 16:8 fasting to a 12-week exercise program did not produce a significant improvement in hot flashes and night sweats specifically, compared with exercise alone, when measured on the questionnaire scale built to isolate those symptoms.

What did the 2025 Nutrients study find about fasting and menopause symptoms?

It found that women who combined 16:8 time-restricted eating with twice-weekly circuit training had significantly greater improvements in overall menopause symptom scores (p = 0.008), mood-related symptoms (p = 0.009), and quality of life (p = 0.013 and p = 0.002) than women who did the same exercise program without fasting — but no significant advantage specifically for hot flashes, night sweats, or sexual symptoms.

Is 16:8 intermittent fasting safe for menopausal women?

This study didn't report any safety concerns or dropouts attributable to the fasting protocol among the 24 women who followed it for 12 weeks, but it wasn't designed as a safety study. Anyone with an existing health condition or on medication should check with a doctor before starting a fasting schedule, especially during perimenopause or menopause when hormone shifts are already underway.

Does time-restricted eating help with menopause symptoms more than exercise alone?

For overall symptom burden and quality of life, yes — the fasting-plus-exercise group improved significantly more than the exercise-only group on several measures. For hot flashes and night sweats specifically, no — the two groups did not differ significantly on that measure.

How many women were in this fasting and menopause study?

54 women completed the trial: 24 in the group that combined 16:8 fasting with exercise, and 30 in the exercise-only comparison group. All were in perimenopause, menopause, or postmenopause.

Related Research and Articles

• Fasting and Night Sweats in Perimenopause
• Fasting and Hot Flashes: What Menopausal Women Should Know
• Intermittent Fasting During Menopause
• The Best Fasting Schedule for Menopause
• Does Intermittent Fasting Affect Sleep?
• Exercise and Fasting for Women
• Intermittent Fasting for Women Over 50

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