Effect of Supplementation With Anthocyanins on Iron Metabolism in Female Swimmers

"Supplement group: supplement of diet - black chokeberry extract (capsules) with 18% standardization of the anthocyanins content (one capsule contained 200 mg). Each capsule also contained: chokeberry fiber, E460b magnesium salts of stearic acid (anti-caking agent), E551 silicon dioxide (anti-caking agent), hydrocypropyl methylcellulose (capsule shell) and E171 titanium dioxide (shell colour).~The producer of all capsules is MLD Biotrade in Poznan."

"Placebo group: placebo product - chokeberry fiber (placebo capsules, which were made from chokeberry fiber).~The producer of all capsules is MLD Biotrade in Poznan."