Science

The studies behind
the claims.

Human research behind the ingredients in DEXO, organized by outcome, dose, population, duration and result.

Overhead view of a male swimmer in a streamlined dive glide through a dark teal lane pool

Research by outcome

Testosterone

Tongkat Ali, purified Shilajit and standardized ashwagandha carry the direct human testosterone research here. Zinc sits alongside them as a status story: restriction lowers testosterone, while repletion in marginal deficiency has been associated with higher levels.

Tongkat Ali · TestosteroneSystematic review + meta-analysis · 2022

Eurycoma longifolia (Jack) Improves Serum Total Testosterone in Men: A Systematic Review and Meta-Analysis of Clinical Trials

People: Adult men across nine studies; five randomized clinical trials in the quantitative analysis · 9 studies · 5 RCTs pooled
Dose: Varied across standardized Tongkat Ali extracts and trials
Window: Varies by included trial

Result

The pooled randomized evidence reported higher total testosterone with Tongkat Ali versus control.

Context

Included studies differed substantially in population, extract, dose and duration. Tongkat Ali extracts are not interchangeable.

Leisegang K, Finelli R, Sikka SC, et al. · Medicina (Kaunas) · 2022PMID 36013514 · DOI 10.3390/medicina58081047View study →

The research map

What each ingredient is actually here for.

Every ingredient has a different job. Some have direct human testosterone research. Others have been studied for energy and fatigue, sleep, stress, strength, endurance, mineral physiology or reproductive health.

That difference is the point. Each ingredient is listed with the research domains it has actually been studied in.

PRIME / AM