Gerade selbst erlebt bei der Autoversicherung: Schau Dir nur mal die Genossenschaftsbanken in Deutschland an.
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3 kg (2. 8 pounds) more weight loss compared to placebo, over a period of 12 weeks. They found no difference in appetite between groups (8). Overall, I looked at 4 more studies.
Two of them showed weight loss of a few pounds over a period of 8 weeks (9, 10), but the other two showed no effect (11, 12).