Supplementation
POLAND
Participants were randomly allocated to a group receiving either 2.5 or 5.0 g/d BET. BET was administered in the form of cellulose capsules (Medicaline, Konrad Malitka, Poland), each containing 500 mg BET. PL was administered in identical-looking white capsules containing cellulose. Participants receiving a daily dose of 2.5 g of BET took three capsules in the morning and two in the evening. The group supplementing with 5.0 g BET per day ingested four capsules in the morning, three in the afternoon, and three in the evening. The capsules were ingested with at least 250 mL of water. The randomized order (BET first or PL first) of the supplementation was double-blinded, for the researcher and the participant. The supplements were prepared by the third party. The doses were not blinded, because we did not want to expose our subjects to excessive amounts of fiber (PL was cellulose), so the number of capsules per day was different in both supplemental groups.