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Insights

The evidence behind the vial

This is where our research write-ups, study breakdowns and practical guides live, so you can check the reasoning before you buy.

Tirzepatide and retatrutide: what the trials show
FeaturedStudy

Tirzepatide and retatrutide: what the trials show

Two of the biggest numbers in obesity research came out of the same lab. Here is how the phase trials compare, and what the figures actually mean.

02 Jul 2026 / 1 min read

AllInsightResearchStudyGuide
Nasal spray, injection or pen and what bioavailability costs you
Insight

Nasal spray, injection or pen and what bioavailability costs you

A peptide that is 90 percent bioavailable subcutaneously and 2 percent intranasally is not the same product at the same label dose. Here is how the three delivery routes compare and what the numbers mean for what reaches your blood.

11 Jun 2026 / 5 min read