Two questions in the same experiment
Mills and colleagues studied 95 adults, including 63 men, in a randomized, blinded crossover experiment. Each person attended a kisspeptin visit and a placebo visit. Luteinizing hormone increased, but measured anxiety, cortisol, heart rate and blood pressure did not differ significantly. Testosterone in men also did not change during the short observation window.
A signal is not a shortcut
The useful reading distinction is between biological activity and a hoped-for outcome. A laboratory signal can show that an intervention did something without showing that it improved mood, sexual function or general well-being. Treat each claimed benefit as a separate question requiring its own outcome measure.
What a null result can tell us
A result that is not statistically significant is not proof of exact equality or a guarantee for every person. Here, the short visits cannot answer questions about repeated exposure or chronic anxiety disorders. The observation is narrower than a blanket claim that kisspeptin relieves anxiety or never causes it.
Keep the evidence attached
We reviewed the complete indexed abstract and figure descriptions. This 2025 study is newly featured by S7 today; the illustration is conceptual. Our discussion explains evidence, not treatment, dosing or the equivalence of commercial research materials to the studied intervention.