Trial; location | Study design; treatment/control groups | Dosage; duration | Active ingredients per daily dosage | Mean age; mean BMI | N treatment/control | Reason for exclusion |
---|---|---|---|---|---|---|
Grassi et al. [19]; Italy | Crossovera,c | 100 g/d | 500 mg polyphenols | 33.9 yr; | 15/15 | Same population and protocol as studied in Grassi et al. [11] |
 | Dark/white chocolate | 15 d |  | 22.6 |  |  |
Crossoverb; | 22g/d | Not reported | 44.7 yr; | 44/44 | No cocoa-free control group | |
 | Chocolate + plant sterols/chocolate + no plant sterols | 28 d (4 wk) |  | 27.8 |  |  |
Balzer et al. [36]; USA | Parallel; | 3 drink mix/d | 963 mg flavanols; | 63.8 yr; | 21/20 | No mean SBP/DBP (SD) reported |
 | High/low-flavanol drink | 30 d (4 wk) | control: 75 mg flavanols | 32.1 |  |  |
Faridi et al. [37]; USA | Crossovera,c; | 74 g bar with 22 g cocoa/d; | 821 mg flavanols | 53 yr; | 44/44 | Duration < 2 wk |
 | Dark chocolate/placebo bar | Single dose, 1 d |  | 30 |  |  |
Ried et al. (phase 2) [23]; Australia | Crossoverd; | 50 g/d; control: 1 capsule/d; | 750 mg polyphenols; | 53.1 yr; | 26/26 | Crossover of two active treatment groups, no true control group |
 | Dark chocolate/Tomato extract capsules | 56 days (8 wks) | control: tomato extract (15 mg lycopene) | 26.6 |  |  |
Almoosawi et al. [38]; UK | Crossovera,c; | 20 g/d; | 1000 mg polyphenols; | 31 yr; | 14/14 | Two dosages, no true control group |
 | Dark chocolate dosage 1/dosage 2 | 14 days | control: 500 mg | 27.7 |  |  |