Reference Study Country	Design N randomised/completed Duration(a) Recruitment criteria	Subject characteristics at baseline(b)	Intervention(b)	Outcomes assessed	Results(b)
Navas‐Carretero et al. (2011) Spain	RCT G1, non‐enriched chicken breast: 16/13 G2, Se‐enriched chicken breast: 16/11 Duration: 10 wk Aged 20–45 yr; BMI 18.5–30 kg/m2; not taking any medication or following any dietary treatment; had maintained their weight (±3 kg) for the last 3 mo; no diabetes, thyroid impairments, or other endocrine disturbances; not suffering gastric and peptic ulcer problems; no hypertension, constipation, or diarrhoea.	Sex: M and F Age (yr): 20–45 BMI (kg/m 2 ) G1: 24.2 ± 2.1 G2: 24.1 ± 2.7 Ethnicity: NR Blood Se (μg/dL) G1: 14.2 ± 1.4 G2: 14.6 ± 1.7 Blood pressure (mmHg) Se intake: NR	Non‐enriched chicken breast vs 22 μg/d Se supplementation as Se‐enriched chicken breast Isocaloric diet with 30% of energy as proteins Blood Se, end of trial (μg/dL): G1: 0.7 ± 0.9 G2: 0.2 ± 1.4	SBP and DBP (method not described; not a pre‐planned outcome)	Baseline SBP (mmHg) G1: 110.0 ± 7.4 G2: 110.0 ± 12.0 DBP (mmHg) G1: 68.8 ± 6.8 G2: 69.1 ± 8.6	Changes from baseline SBP (mmHg) G1: −8.5 ± 10.3 G2: −1.8 ± 8.7 G1 vs G2 NS DBP (mmHg) G1: −1.1 ± 8.9 G2: −3.2 ± 7.5 G1 vs G2 NS

d: day; DBP: diastolic blood pressure; F: females; Gx: group x; M: males; mo: month; NR: not reported; SBP: systolic blood pressure; SD: standard deviation; Se: selenium; RCT: randomised controlled trial; wk: week; yr: year.

(a) Duration = duration of the treatment phase, unless specified otherwise.

(b) Mean ± SD, unless specified otherwise.