A small randomized study raises a reproductive-health question without establishing a fertility treatment.

A change in a semen measurement is an interesting research signal, not proof of improved chances of pregnancy.

What a controlled brain-imaging experiment contributes to research on low sexual desire—and what it cannot establish.

An experimental brain response can help researchers form a hypothesis without proving an effective long-term treatment.

An arithmetic-only guide to three different quantities that can hide behind the word concentration.

A number is not a complete concentration: identify the substance, the numerator and the denominator before comparing values.

A focused reading of retatrutide’s phase-two obesity trial and the limits of borrowing evidence across catalog compounds.

A trial supports claims about its tested product, population and endpoints—not every benefit attached to a compound online.

What a 176-week trial adds to long-term evidence, and why its observation period is not a reusable schedule.

Long follow-up helps answer a specific clinical question; it does not validate a generic on-and-off peptide cycle.