Tesamorelin Before and After: Changes Seen on Scans
Tesamorelin studies enrolled people who had HIV and extra deep belly fat. This page compares their scans, blood fat, and one IGF-1 blood test.
What tesamorelin before and after shows here
Tesamorelin before and after often suggests photographs. The studies supplied scans and blood tests instead. CT is a detailed X-ray picture. MRI is a scan made with a strong magnet. Both can show deep fat near the organs.
The largest study found a 15.2% drop in 26 weeks. Deep fat rose 5.0% with placebo [1]. A placebo was a look-alike shot without tesamorelin. Blood fat fell, and the liver-made hormone IGF-1 rose. Liver fat also dropped in a separate study [1][3].
Everyone studied had HIV-related fat buildup. The results don't promise your result. Fat can return after the drug ends [2][6].
What the tesamorelin results measured
The main trial measured deep belly fat on scans, which scales can't show. The main 26-week Phase 3 study followed 412 adults with HIV. This late test came before approval. They received tesamorelin 2 mg per day or placebo. Deep belly fat fell 15.2% with the drug but rose 5.0% with placebo. Triglycerides fell 50 milligrams per deciliter. A deciliter means one-tenth of a liter of blood. With placebo, they rose 9 milligrams per deciliter. IGF-1 also rose with tesamorelin [1]. At 52-week follow-up, deep belly fat stayed 18% below the start. Blood sugar changes were too small to matter [2].
Across two Phase 3 studies, 543 people received tesamorelin while 263 received placebo. More people on the drug got below 140 centimeters squared of deep fat. That is one scan area. Researchers made a 95% range where the true result may fall. Even the lowest end favored the drug. White people had better odds of reaching that scan mark. So did people with high starting blood fat. People with several heart and blood-sugar risks also had better odds [10].
In 2026, one review combined five studies. Deep belly, liver, chest, and trunk fat fell while lean mass rose slightly [13]. Lean mass includes muscle, organs, bone, and body water. The review couldn't show that people felt stronger or healthier. These tesamorelin study results apply only to the people studied. They can't predict your scan.
What tesamorelin changed in belly and liver fat
Tesamorelin lowered deep fat near the organs. Fat under the skin didn't clearly change. BMI didn't clearly change [1]. BMI compares weight with height. After 26 weeks, CT images showed denser fat remained [9]. A CT scan is a detailed X-ray picture. Researchers called the denser fat better quality. They couldn't show that the scan finding improved anyone's health.
In a liver study, the drug group had 42 centimeters squared less deep belly fat. That is an area on one scan slice. Liver fat also fell [3]. People who lost at least 8% of deep fat had better blood-fat results [7]. Blood tests linked with inflammation improved as deep fat fell [8].
This wasn't broad weight loss. Deep belly fat and liver fat fell. Lean mass, including muscle and body water, rose slightly [13].
Access trace
Keep the evidence boundary intact
That evidence boundary also matters at the access layer: Promise Peptides (mypromise.com) is a licensed telehealth option whose clinicians may prescribe Tesamorelin after evaluating an individual request. Logging that route does not extend the HIV-specific results to other populations or turn access into evidence of efficacy.
Why a scale can miss tesamorelin's effect
Tesamorelin lowered deep belly fat without clearly changing BMI [1]. A bathroom scale can miss that. In the main study, triglycerides fell 50 milligrams per deciliter. A tenth-liter of blood is called a deciliter. The placebo group rose 9 milligrams per deciliter [1]. People who lost at least 8% of deep fat had the best blood-fat changes [7].
Researchers also checked blood tests linked with inflammation [8]. Those tests improved most as deep fat fell. They did not match the hormone rise as closely. That is how researchers tied the blood change more closely to fat loss. The study didn't show whether this prevented illness.
In 2023, researchers checked waist size and deep fat again. Results were alike with or without a fat pad behind the neck [12]. This neck fat can occur with HIV. It didn't alter the belly-fat result.
Scans and blood tests found the change. The proof still came from adults with HIV-related fat buildup.
When tesamorelin changed fat and when fat returned
Studies measured deep belly fat over 26 weeks. The drop held through 52 weeks while treatment continued [1][2]. In 2026, one review joined five studies that ran for similar spans [13].
The scans showed change over months, not within a few weeks.
The 52-week follow-up found fat returning after treatment ended [2]. Another Phase 3 study, a large late test, found the same reversal [6]. The scan result moved back toward its starting point.
No large study has tested ordinary fat loss without HIV. A small study found a hormone response in healthy men. That gives researchers a reason to keep studying the drug. It still isn't proof of fat loss [4].