Diets
time-restricted eating improves LDL cholesterol and triglycerides
In plain terms: Does time-restricted eating meaningfully improve your cholesterol and triglycerides?
Part of: 🥗 time-restricted eating
Weakly and inconsistently — some trials show small drops in triglycerides or LDL, but pooled evidence is mixed and much of any benefit appears driven by weight loss rather than meal timing itself.
📅 Last reviewed: 2026-07-15 ⓘ
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
How the studies fall
The evidence (14)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Wang XY et al 2025 · study_type: RCT | RCT | contradicts | moderate | 142 postmenopausal women, 8wk, 3-arm RCT: TRE+Tai-Chi > TRE-alone (p=0.030) and > control (p=0.000) for LDL-C; TRE-alone vs control LDL-C difference not separately reported. |
| Motiwala 2025 · Cureus | meta-analysis | mixed | low | Meta-analysis of Ramadan fasting in South Asians found lowered LDL/total cholesterol but no significant triglyceride change. |
| Chen S et al 2025 · study_type: meta-analysis | meta-analysis | contradicts | high | MA of 13 RCTs, n=612 overweight/obese women: TRE 'showed no significant effects on ... blood lipids ... (p>0.05)' despite significant reductions in body weight and fasting insulin. |
| Barve 2025 · Nat Commun | RCT | mixed | low | 6-month intermittent fasting RCT produced significant reductions in LDL, non-HDL cholesterol and triglycerides alongside 8% weight loss. |
| Soltanova L et al 2026 · study_type: observational | observational | tested-null | low | TRE 10am-6pm, 12wk, 9 Cushing's-remission adults with obesity: 'No statistically significant changes were observed in fasting glucose, HbA1c, or lipid parameters' despite significant weight/BMI loss. |
| Popiolek-Kalisz 2026 · Nutr Metab Cardiovasc Dis | meta-analysis | mixed | moderate | Umbrella review of intermittent-fasting meta-analyses found inconsistent, generally small effects on lipid parameters across TRE/ADF/Ramadan regimens. |
| Santos 2018 · Clin Nutr ESPEN | observational | mixed | low | Review found IF (mostly Ramadan/observational) may lower total cholesterol, LDL and TG and raise HDL, but effects were confounded by diet and weight loss and lacked large RCTs. |
| Wong 2025 · Nutrition Reviews | meta-analysis | mixed | moderate | Meta-analysis of 16/8 TRE found modest glycemic benefit but weak/inconsistent effects on lipid profile. |
| Semnani-Azad 2025 2025 · BMJ | meta-analysis | contradicts | high | Network meta-analysis of intermittent fasting found small cardiometabolic benefits largely tracking weight loss, with limited independent lipid improvement. ⚠️ correction-on-file (Crossref) - kept, corrigendum not retraction |
| Sutton EF, et al. (Peterson) 2018 · Cell Metab | RCT | tested-null | moderate | In weight-maintained eTRF crossover (prediabetic men), lipids (cholesterol, TG) did NOT significantly improve, arguing lipid benefits are not intrinsic to meal timing absent weight loss. |
| Wang B et al] # corrected 2026-08-17 from PubMed; was [(IF body-comp SR/MA) 2025 · Nutr J | meta-analysis | mixed | moderate | RCT meta-analysis in overweight/obese adults found inconsistent lipid effects for IF vs continuous energy restriction, with no reliable superiority for TG or LDL. |
| Yi 2025 · Frontiers in Nutrition | meta-analysis | contradicts | moderate | TRE without caloric restriction showed limited/inconsistent lipid changes in non-diabetic adults, with lipid endpoints weaker than BP or glucose effects. |
| Lu 2026 · Diabetol Metab Syndr | meta-analysis | mixed | moderate | Meta-analysis in type 2 diabetes found TRE reduced triglycerides but did NOT significantly change total or LDL cholesterol. |
| Sun 2025 · Sci Rep | meta-analysis | contradicts | low | Network meta-analysis ranked carbohydrate-restricted diets (not IF/TRE) best for lipid modulation and HDL; TRE/IF was not a leading lipid-lowering pattern. |
Disagree, or know a study we missed?
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.