Tirzepatide

Quickstart highlights

Dosing & reconstitution guide

Standard protocol (2 mL = 5 mg/mL)

A 10 mg vial dissolved in 2 mL bacteriostatic water gives a concentration of 5 mg/mL. Calculate your own dilution →

Reconstitution steps

1. Let the vial reach room temperature and wash your hands.
2. Disinfect both rubber stoppers with an alcohol swab.
3. Draw up 2 mL of bacteriostatic water.
4. Inject the water slowly down the glass wall, not directly onto the powder.
5. Swirl gently until clear — never shake.
6. Label the vial with date and concentration and refrigerate.

Supplies needed

• Tirzepatide vial (10 mg)
• Bacteriostatic water
• Mixing syringe (1–3 mL) and U-100 insulin syringes
• Alcohol swabs and sharps container

Protocol overview

Dosing protocol in research

Values as described in literature and research protocols; not dosing advice.

Storage instructions

• Lyophilised (powder): cool, dry and dark; long-term at −20 °C.
• After reconstitution: refrigerator at 2–8 °C, use within ~4 weeks.
• Avoid repeated freezing and thawing.

Important notes

How this works

Tirzepatide is a synthetic peptide that mimics two natural incretin hormones. Scientists study this compound for its significant influence on blood sugar levels and body weight. In clinical settings, it is known by the brand names Mounjaro and Zepbound.

This peptide binds to both GIP and GLP-1 receptors. While older compounds like semaglutide target only GLP-1, tirzepatide adds stimulation of the GIP receptor. This combination enhances the post-meal insulin response and slows gastric emptying. The GIP component potentially plays an additional role in how adipose tissue processes energy. With a half-life of approximately five days, the substance remains active in the body for an extended period. The molecule is based on the GIP amino acid sequence, modified for stability and binding.

Clinical research in the SURMOUNT and SURPASS trials examined effects in thousands of participants with type 2 diabetes or obesity. In phase 3 studies, the highest dosage resulted in significant body weight reductions after 72 weeks. The compound is FDA and EMA approved for specific medical uses as Mounjaro and Zepbound. Scientists are currently investigating its effects on fatty liver disease and sleep apnea. Questions regarding the maintenance of muscle mass during use remain a subject of debate.

Potential benefits & side effects

Effects described in research

• Strong appetite suppression
• Improved insulin sensitivity
• Reduction in HbA1c and fat mass

Common side effects

• Nausea and reduced appetite
• Diarrhoea or constipation
• Belching, bloating
• Rare: pancreatitis, gallstones

The most frequently reported side effects are nausea, diarrhea, and vomiting, particularly during the initiation phase. Rarer but serious risks mentioned in literature include pancreatitis and gallbladder issues. Because the compound is relatively new, data on the effects of use over several decades are lacking.

Contraindications

• Personal/family history of medullary thyroid cancer or MEN2
• History of pancreatitis
• Pregnancy or breastfeeding
• Type 1 diabetes

Lifestyle factors

• Smaller, protein-rich meals reduce GI complaints.
• Stay well hydrated; dehydration worsens nausea and constipation.
• Resistance training helps preserve lean mass during weight loss.
• Limit alcohol and very fatty meals.

Injection technique

• Choose a site with subcutaneous fat: abdomen (5 cm from the navel), thigh or back of upper arm.
• Disinfect, pinch a skin fold and insert at a 45–90° angle.
• Inject slowly, wait 5 seconds and withdraw.
• Rotate sites and use each needle once.

Recommended source

Quality varies widely between suppliers. Look for an independent HPLC/MS lab report per batch, purity ≥ 98% and clear storage and shipping conditions.

As a reference we use the Tirzepatide from PeptideWinkel, which publishes lab reports per batch.

Frequently asked questions