# Anxiety, appetite and bone findings

> Beyond reproduction | Omni Men's Health — Anxiety, appetite and bone markers take Omni Men's Health beyond kisspeptin's reproductive findings, while keeping each study population in view.

Following the wider research means giving a null result as much room as an intriguing new signal.

## Anxiety during a human experiment

In a [2025 randomized crossover trial involving 95 participants, kisspeptin-54 increased LH but did not significantly alter state anxiety compared with placebo](https://pubmed.ncbi.nlm.nih.gov/40036336/). The group included 63 men and 32 women. Cortisol, blood pressure and heart rate also showed no significant difference.

I appreciate experiments that can put an attractive extension of a story under pressure. The reproductive hormone response established biological activity during this experiment; the anxiety measure still came back without a significant change. A broadly emotional account of kisspeptin has to make room for that.

For me, the result earns a clear sentence of its own. Adding a speculative mood benefit would crowd out what the investigators actually measured. The desire experiments remain interesting, while this anxiety experiment has its own answer.

## Food intake in women with overweight or obesity

A human appetite study produced another useful separation. In women with overweight or obesity, [intravenous kisspeptin raised LH without changing self-rated hunger or objectively measured food intake compared with the control condition](https://pubmed.ncbi.nlm.nih.gov/37039248/). The population was women, and both the subjective hunger measure and the measured meal were considered.

The meal is the part of the experiment I like best. A theory about appetite eventually has to meet something concrete enough to eat. Here, biological activity and the food-intake result went different ways. That is a productive answer, even if it offers little material for an enthusiastic headline.

The [authors argued against a direct appetite-suppressing effect in this population](https://pubmed.ncbi.nlm.nih.gov/37039248/). The scope of that conclusion seems sensible to me: it concerns these women and these measurements. Adding a claim about men or another route of administration would outrun the experiment.

![Partly eaten meal, water glass, cutlery and closed notebook on a plum-coloured dining table](images/appetite-table.webp)

*An imagined research dining table, illustrated to accompany the food-intake finding; it is not a photograph from the study.*

## Bone markers in healthy men

The bone experiment moves into a different group and a different kind of measurement. In [26 healthy eugonadal men, acute kisspeptin administration produced a maximal 20.3% rise in total osteocalcin and a 24.3% rise in carboxylated osteocalcin](https://pubmed.ncbi.nlm.nih.gov/35244717/). Eugonadal describes the normal sex-hormone status of the men studied. Osteocalcin was measured as a marker of bone formation.

This is the sort of peripheral finding that makes the wide view rewarding. I had come for reproductive biology and found a question about the skeleton waiting beside it. My excitement is about a possible line of investigation, while the reported outcome remains a change in markers.

Related [work in mice and osteoclasts identified a kisspeptin-10 pathway that suppressed bone-resorbing cell activity and prevented bone loss in the studied models](https://pubmed.ncbi.nlm.nih.gov/38346942/). Those animal and cellular findings offer a mechanistic lead. They have a different scope from the acute human marker experiment.

## How wide to open the frame

The name Omni could encourage an appetite for benefits everywhere. My version of the wide view gives disagreeing findings room to sit together: an unchanged anxiety measure, a similar meal, and a rise in a bone marker that leaves a larger clinical question open.

I leave this collection impressed by the research and impatient with any larger story that smooths away its awkward edges. Each detour makes the biology less tidy. That untidiness is a reason to stay interested.

For the reproductive experiments, return to [testosterone and timing](/testosterone) or [sexual desire](/sexual-desire). The [reading list](/references) groups the source records around the questions they address.

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Through Omni Men's Health I pursue a wider portrait of men in published research; this editorial site is no healthcare business and offers no medical advice.