2.3. Testing of Dietary Supplements
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Patients randomized to the intervention’s experimental group received a daily dose of four capsules composed of 250 mg beta-glucan, 3.75 µg vitamin D3, 1.05 mg vitamin B6, and 7.5 mg zinc, plus microcrystalline cellulose and plant capsule as excipients. The placebo composition was the same capsule with microcrystalline cellulose without any active ingredients. The treatments were identical in terms of size, color, opacity, shape, presentation, and packaging. All capsules were manufactured and donated by Vitae Health Innovation S.L. (Montmeló, Barcelona, Spain). The study pharmacist recorded all treatments supplied on the medication-dispensing forms along with their original prescription.