PinnyPeptide

HGH Fragment 176-191 vs Tesamorelin

Side-by-side comparison: effects, dosing ranges, side effects, regulatory status, and reconstitution.

Peptide A

HGH Fragment 176-191

Weight Management

The unmodified C-terminal fragment of growth hormone — the original lipolytic peptide.

Peptide B

Tesamorelin

Growth Hormone

FDA-approved GHRH analog for HIV-associated lipodystrophy with potent GH-releasing activity.

Typical vial

5 mg

Typical dose

250-500 mcg

Half-life

~30 minutes

FDA status

Not FDA approved. Distinct from AOD-9604, which holds GRAS s…

Typical vial

2 mg

Typical dose

1000-2000 mcg

Half-life

~26 minutes

FDA status

FDA approved. Egrifta (tesamorelin) approved November 2010 f…

HGH Fragment 176-191 effects

  • Stimulates lipolysis (fat breakdown) in adipose tissue
  • Inhibits lipogenesis (new fat formation)
  • Does not bind the GH receptor
  • Does not raise IGF-1 or affect blood glucose
  • Targets stubborn / subcutaneous fat in cut-phase protocols

Tesamorelin effects

  • FDA-proven reduction of visceral adipose tissue
  • Stimulates physiological pulsatile GH release
  • Improves body composition by reducing trunk fat
  • May enhance cognitive function in older adults
  • Increases IGF-1 levels
  • Does not significantly affect glucose homeostasis at approved doses

HGH Fragment 176-191 side effects

  • Injection-site irritation or redness
  • Occasional headache
  • Mild fatigue at the start of a cycle (rare)
  • Transient flushing

Tesamorelin side effects

  • Injection site reactions (erythema, pruritus, pain)
  • Arthralgia (joint pain)
  • Peripheral edema
  • Myalgia (muscle pain)
  • Hypersensitivity reactions (rare)
  • Potential increase in IGF-1 above normal range

HGH Fragment 176-191 dosing ranges

Fat loss / body recomposition

250-500 mcg · Once daily, morning, on an empty stomach (SubQ) · 8-12 weeks

Split-dose protocol for stubborn fat

250 mcg · Twice daily (morning + pre-cardio), fasted · 8-12 weeks

Tesamorelin dosing ranges

HIV lipodystrophy (FDA approved)

2000 mcg · Once daily (SubQ) · Ongoing as prescribed

Body composition / anti-aging (off-label)

1000-2000 mcg · Once daily · 8-12 weeks

HGH Fragment 176-191 vs Tesamorelin — common questions

What is the difference between HGH Fragment 176-191 and Tesamorelin?

HGH Fragment 176-191: The unmodified C-terminal fragment of growth hormone — the original lipolytic peptide. Typical dose 250-500 mcg. Tesamorelin: FDA-approved GHRH analog for HIV-associated lipodystrophy with potent GH-releasing activity. Typical dose 1000-2000 mcg. Both fall under the Weight Management and Growth Hormone categories.

Can you stack HGH Fragment 176-191 and Tesamorelin?

Stacking HGH Fragment 176-191 with Tesamorelin is a protocol-design question best raised with a clinician — it depends on your goal, current bloodwork, and whether both peptides target overlapping mechanisms. Both peptides should be tracked independently with separate injection sites and timing. PinnyPeptide supports multi-peptide stacks with automatic injection site rotation.

Which is dosed more frequently, HGH Fragment 176-191 or Tesamorelin?

HGH Fragment 176-191 is typically dosed: Once daily, morning, on an empty stomach (SubQ) for Fat loss / body recomposition; Twice daily (morning + pre-cardio), fasted for Split-dose protocol for stubborn fat. Tesamorelin is typically dosed: Once daily (SubQ) for HIV lipodystrophy (FDA approved); Once daily for Body composition / anti-aging (off-label).

Are HGH Fragment 176-191 and Tesamorelin FDA approved?

HGH Fragment 176-191: Not FDA approved. Distinct from AOD-9604, which holds GRAS status as a food additive. Tesamorelin: FDA approved. Egrifta (tesamorelin) approved November 2010 for reduction of excess abdominal fat in HIV-infected patients with lipodystrophy. Egrifta SV (reformulated single-vial) approved 2019.

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