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Cts4.2
Chitosan – Forschung
Hilft wahrscheinlich
9 begutachtete Studien
Was die Evidenz sagt
Hilft wahrscheinlich
Chitosan scheint in 6 von 6 Studien mit messbaren Effekten zu helfen — die Evidenz tendiert klar ins Positive.
Die meiste Evidenz stammt aus hochwertigen Meta-Analysen und randomisierten Studien, veröffentlicht 2004–2024 mit einer typischen Studiengröße von 1,130 Teilnehmenden.
Basierend auf 9 Studien · 6 Meta-Analysen · 4,637 Teilnehmende insgesamt
Konfidenz
Hohe Konfidenz
Was die Studien gefunden haben
6geholfen· 3 weitere ohne bewertete Effektdaten
Nach Outcome
Weight managementSmall weight and body-fat reduction (~0.8-1.7 kg in trials); effect shrinks in higher-quality studies and is unlikely to be clinically meaningful on its own · 8-12 weeks
Hilft wahrscheinlich7 Studien
Cholesterol & lipidsModest total-cholesterol reduction; effect on LDL is inconsistent · 8-12 weeks
Überwiegend Mechanismus / Beobachtung3 Studien
Lean body mass & muscle growth
Zu wenige bewertete Studien2 Studien
Heart & blood pressureModest total-cholesterol reduction; effect on LDL is inconsistent · 8-12 weeks
Zu wenige bewertete Studien1 Studie
Glucose & metabolicSmall reductions in fasting glucose and HbA1c reported at 1.6-3 g/day for 13+ weeks in metabolic-syndrome populations · 12+ weeks
Zu wenige bewertete Studien1 Studie
Safety profile
Zu wenige bewertete Studien1 Studie
In Zahlen
Aus 9 Studien mit messbaren Effekten gezogen
Wahrscheinlich echte Effekte
100%
über Studien hinweg
Untersuchte Personen
4,637
typische Studie: 1130 Personen
Stärkste Designs
6
6 gepoolt, 0 randomisiert
Zeigte Nutzen
100%
6/6 Studien
Untersuchte Populationen
Overweight and obese adults3
Adults, mostly overweight/obese1
Adults1
Adults with metabolic syndrome / diabetes1
Stetige Forschung
2 Studien in den letzten 5 Jahren · Neueste Meta-Analyse: 2024
200420142024
1Body weight reductionMeta-Analysen=1,219 · large study2008
Einfach gesagt: Results obtained from high quality trials indicate that the effect of chitosan on body weight is minimal and unlikely to be of clinical significance.
Jull AB, Ni Mhurchu C, Bennett DA, Dunshea-Mooij CA, Rodgers A · Cochrane Database of Systematic Reviews (2008)
Spürbar Nutzen
← SchlechterKein EffektBesser →
Fifteen randomized controlled trials with 1219 participants met the inclusion criteria.
Pooled analysis showed a statistically significant greater weight loss with chitosan (weighted mean difference -1.7 kg; 95% CI -2.1 to -1.3; P < 0.00001), plus small decreases in total cholesterol and blood pressure.
When analyses were restricted to trials that met allocation-concealment criteria, were larger, or of longer duration, the decreases in weight and total cholesterol were substantially smaller.
2Body weight and body compositionMeta-Analysen=1,130 · large study2020
Einfach gesagt: Our findings provided evidence that chitosan consumption might be a useful adjunctive pharmacological therapeutic tool for body weight management particularly in overweight/obese participants.
Huang H, Liao D, Zou Y, Chi H · Critical Reviews in Food Science and Nutrition (2020)
Spürbar Nutzen
← SchlechterKein EffektBesser →
Likely real
Fifteen eligible trials (18 treatment arms) with 1130 subjects were pooled using random-effects models with trial sequential analysis.
Chitosan significantly reduced body weight (WMD -0.89 kg; 95% CI -1.41 to -0.38; P = 0.0006), BMI (WMD -0.39 kg/m2; P = 0.002) and body fat (WMD -0.69%; P = 0.0001).
Subgroup analyses showed effects were larger at doses above 2.4 g/day, in shorter trials (<12 weeks), and in overweight/obese participants.
3Obesity indicators (weight, body fat, BMI, waist circumference)Meta-Analyse2024
Einfach gesagt: Chitosan supplementation shows promise in improving obesity indicators by reducing BFP and increasing FFM. However, further well-designed studies with larger sample sizes are needed to confirm these findings.
Kholdebarin M, Pahlavani N, Nikbaf-Shandiz M, et al. · Food Science & Nutrition (2024)
Spürbar Nutzen
← SchlechterKein EffektBesser →
Likely real
Nineteen RCTs contributing 21 effect sizes were combined using random-effects models.
Chitosan significantly reduced body weight (WMD -0.79 kg; 95% CI -1.30 to -0.29; P = 0.002) and body-fat percentage (WMD -0.41%; P < 0.001), and modestly increased fat-free mass (WMD +0.20 kg; P = 0.005).
There was no significant effect on BMI (WMD -0.35 kg/m2; P = 0.054) or waist circumference (WMD -0.71 cm; P = 0.069).
4Fasting glucose and HbA1cMeta-Analysen=1,473 · large study2020
Einfach gesagt: The glucose level of patients who are diabetic and obese/overweight can be improved by supplementation with chitosan for at least 13 weeks at 1.6-3 g per day.
Guo W, Yi L, Zhou B, Li M · Nutrition Journal (2020)
Spürbar Nutzen
← SchlechterKein EffektBesser →
Ten randomized controlled trials with 1473 subjects were pooled with random-effects meta-analysis and trial sequential analysis.
Chitosan significantly reduced fasting glucose (SMD -0.39 mmol/L; 95% CI -0.62 to -0.16) and HbA1c (SMD -1.10; 95% CI -2.15 to -0.06), but did not affect insulin levels.
Subgroup analyses found significant fasting-glucose reductions at 1.6-3 g/day and in studies lasting longer than 13 weeks.
5Serum lipids (total cholesterol)Meta-Analysen=416 · medium study2009
Einfach gesagt: Based upon the currently available literature, we can only say that chitosan beneficially affects total cholesterol with 95% confidence.
Baker WL, Tercius A, Anglade M, White CM, Coleman CI · Annals of Nutrition & Metabolism (2009)
Spürbar Nutzen
← SchlechterKein EffektBesser →
Likely real
Six randomized, placebo-controlled trials in hypercholesterolemic patients (n = 416) were meta-analyzed.
Chitosan significantly lowered total cholesterol (WMD -11.59 mg/dL; 95% CI -21.45 to -1.73; P = 0.02).
It did NOT significantly change LDL cholesterol, HDL cholesterol, or triglycerides.
6Body-weight reduction across dietary supplementsSystematische Übersicht2004
Einfach gesagt: The evidence for most dietary supplements as aids in reducing body weight is not convincing. None of the reviewed dietary supplements can be recommended for over-the-counter use.
Pittler MH, Ernst E · The American Journal of Clinical Nutrition (2004)
A systematic review of five prior systematic reviews/meta-analyses and 25 additional double-blind RCTs covering chitosan, glucomannan, chromium, Garcinia and other weight-loss supplements.
The reviewed studies provided some encouraging data but no evidence beyond reasonable doubt that any specific supplement, including chitosan, is effective for reducing body weight.
9Efficacy and safety of complementary weight-loss therapiesÜbersicht2021
Einfach gesagt: The evidence is still relatively limited and not encouraging to provide a definitive conclusion due to the methodological shortcomings and the presence of adverse events in chitosan and fiber supplementation.
Lua PL, Roslim NA, Ahmad A, Mansor M, Aung MMT, Hamzah F · Journal of Evidence-Based Integrative Medicine (2021)
A narrative review of eight systematic reviews/meta-analyses and 11 additional RCTs (765 participants) evaluating complementary weight-loss therapies.
Chitosan, spirulina, probiotics, EPA+DHA, vitamin D, fiber and herbal extracts were each associated with only small reductions in body weight (roughly 1-10 kg across heterogeneous studies).
They concluded the evidence is limited and not encouraging enough for a definitive recommendation.