Coenzyme Q10 improves sperm parameters, but the meta-analysis did not show an increase in the percentage of pregnancies or births. What exactly was studied and where the evidence ends.

What exactly was compared in studies on creatine before and after training and on the loading phase, what were the results, and what the ISSN position does not resolve at all.

Ferritin below 50 µg/l and fatigue despite normal morphology: what the Vaucher 2012 study measured, whose threshold it is, and who funded the trial.

A meta-analysis of 18 randomized studies reports 0.09 kg of fat tissue per week over placebo. We check the scale of this effect and safety signals.

The EU health claim for glucomannan exists and has strict conditions. However, a meta-analysis of eight randomized studies did not confirm significant weight loss.

Cochrane Review 2019: 38 studies, 10,377 participants, NNTB 8. We check whether the dose of NAC changes the effect and why older studies yielded better results.

Does iron deficiency harm learning and does supplementation reverse it? Three meta-analyses and a 10-year observation: populations, numbers, and limits of conclusions.

Current Cochrane review from 2023: 7 studies, 1319 women, RR 0.53 for gestational diabetes, but the certainty of evidence is low. We examine what this means.

What to do when edible CBD has a stronger effect than you planned: symptoms from controlled studies, situations requiring a doctor, and the truth about mixing with alcohol.

D-mannose was supposed to prevent recurrent bladder infections. The largest placebo-controlled study did not confirm its effectiveness. What is known today and what works.

Zinc and semen quality: a meta-analysis of 20 studies says one thing, the largest randomized trial of 2370 pairs says another. We compare both results and explain the difference.

Which strains performed better than placebo, which did not, how significant is this advantage, and why the yeast from the ampoule is not neutral for every traveler.