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Stack · Growth Hormone

Tesamorelin + Ipamorelin (Tesa/Ipa)

Also searched as: tesa ipa, tesa/ipa, tesamorelin ipamorelin blend, tesa ipa blend, tesamorelin ipamorelin

A ready-mixed injectable vial of two growth-hormone-raising peptides, sold online for fat loss and 'recomp'. Common vials hold 10mg tesamorelin with 3mg or 5mg ipamorelin. Tesamorelin is a real US medicine (Grade A), but only for deep belly fat in people with HIV. Ipamorelin is Grade C. The blend itself has never been tested.

In plain English

Why people buy it

People buy it to lose belly fat, build muscle and slow ageing. Both parts make the body release more of its own growth hormone.

What we actually know

  • •It mixes two products in one bottle: tesamorelin and ipamorelin.
  • •Tesamorelin is an approved US medicine for deep belly fat in people with HIV. There is no good proof in healthy people.
  • •Ipamorelin raises growth hormone in people. It has never been shown to make anyone healthier, stronger or leaner.
  • •The two together have never been tested in people. Neither is a licensed medicine in the UK.

What might happen

  • •Your growth hormone will probably rise. Whether that helps you is unproven.
  • •Higher growth hormone can bring water retention, joint pain or higher blood sugar.
  • •Tesamorelin might help an existing cancer grow. Doctors do not give it to people with active cancer.
  • •Belly fat lost on tesamorelin came back after stopping in the HIV studies.
  • •It is sold online as 'not for human use'. Nobody checks what is in the bottle, or if it is clean.
  • •Both are banned in sport at all times.

Bottom line

One proven medicine for one group, mixed with one unproven peptide. For healthy people, it is a guess.

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C

The verdict

Mixed evidence: the weakest link is Grade C — early / limited human data.

Stacking peptides doesn't combine their evidence — it combines their unknowns. A stack is only as proven as its members.

01 — What is it?

Tesa/Ipa is not a single drug. It is a pre-mixed powder vial of two peptides: tesamorelin, a lab-made copy of the body's own growth-hormone trigger (GHRH), and ipamorelin, which nudges the pituitary gland through a different switch (the ghrelin receptor). Seller listings show different ratios, such as 10mg tesamorelin with 3mg or 5mg ipamorelin. It is sold by online 'research peptide' shops, labelled for research use only. This is not Egrifta, the licensed US tesamorelin medicine; it is unlicensed powder of unknown quality.

02 — Why it's hyped

It borrows the reputation of both parts. Tesamorelin is the one growth-hormone peptide with big, proper trials and a US licence, so sellers lean on its 'proven belly-fat burner' label. Ipamorelin is marketed as the 'clean' growth-hormone pulse that does not push up hunger or stress hormones much. Put together, the pitch is the same two-levers logic as CJC-1295 + ipamorelin, but with a 'proven' name on the label.

03 — The honest take

Tesamorelin's Grade A is real but narrow: it covers shrinking deep belly fat in people with HIV-associated lipodystrophy, where large placebo-controlled trials led to its US approval, and even there the fat comes back after stopping. That grade does not transfer to fat loss, bodybuilding or anti-ageing in healthy adults, where there is no comparable trial evidence. Ipamorelin reliably raises growth hormone in people, but its only efficacy trial (restarting the gut after bowel surgery) was negative, and nothing it is sold for has been shown in humans. Nobody has tested the two together. And the vial is not the medicine from those trials: it is grey-market powder whose identity, purity and sterility nobody checks. Raising growth hormone also has real trade-offs, including higher blood sugar, fluid retention and a theoretical worry about tumour growth.

04 — What's actually in it

05 — Is it legal in the UK?

Neither is a licensed medicine in the UK. Tesamorelin is approved in the US (Egrifta) but not by the MHRA; in the UK it is only obtainable as an unlicensed medicine through a prescriber, or illegitimately as a grey-market 'research chemical'. Ipamorelin has no marketing authorisation anywhere. Selling either for human use without authorisation breaches the Human Medicines Regulations 2012. Both tesamorelin and ipamorelin are prohibited at all times under WADA category S2.

Last reviewed: 2026-10