Tirz 15 mg

What is Tirz?
Tirz is a synthetic peptide developed for research purposes, classified as a dual receptor agonist targeting both the glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) receptors.
This unique mechanism sets it apart from earlier GLP-1only compounds by potentially engaging multiple hormonal pathways involved in energy balance, insulin signaling, and appetite regulation.
In preclinical studies, this peptide has drawn interest for its ability to mimic and enhance the effects of two naturally occurring incretin hormonesGLP-1 and GIP. These hormones are released by the gut in response to nutrient intake and play key roles in stimulating insulin secretion, reducing glucagon levels, delaying gastric emptying, and influencing appetite.
Tirz is provided as a high-purity research peptide in lyophilized powder form, suitable for reconstitution under sterile laboratory conditions.

Note: Tirz is not approved for human use or therapeutic applications. This compound is intended strictly for in vitro or preclinical research and must be handled by qualified professionals in accordance with relevant guidelines and regulations.

Mechanism of Action (Based on Research)
Tirz functions as a dual agonist of the GLP-1 (glucagon-like peptide-1) and GIP (glucose-dependent insulinotropic polypeptide) receptors, which are key components of the incretin system.
GLP-1 and GIP are naturally occuring hormones secreted by the gut in response to food intake, where they play a major role in regulating insulin release, glucose balance, and appetite signals.
By activating both receptors at once, Tirz appears to engage complementary pathways involved in metabolic homeostasis, making it a promising peptide for studies focused on energy regulation.
Research on GLP-1 and GIP Activation
In laboratory settings, GLP-1 receptor activation has been shown to enhance insulin secretion, reduce glucagon levels, and slow gastric emptying, all of which contribute to stabilizing blood glucose levels after meals.
GIP receptor activation, while historically less emphasized, also plays a role in insulin sensitivity and fat metabolism. Interestingly, when both receptors are stimulated togetheras with Tirzthe result may be greater than the sum of its parts, offering improved glucose control and appetite regulation in animal models compared to GLP-1 agonism alone.
In other words, the peptide may help the body respond more efficiently to food, improving how it handles sugar and energy storage.
Research has also shown that this dual activity impacts the central nervous system, potentially altering appetite-related signals in the brain, as well as peripheral systems involved in lipid metabolism and energy expenditure.

Summary: These mechanisms are still under active investigation, but the early data suggest that Tirz’s multi-pathway engagement could make it an important compound in the broader study of obesity, insulin resistance, and metabolic disorders.

Research Applications
Tirz has drawn considerable attention in preclinical and observational research for its potential effects on metabolic function, particularly in studies focused on obesity, insulin regulation, and energy expenditure.
While tirz peptide is not approved for medical use, findings from animal models and in vitro studies suggest this dual-agonist peptide may offer advantages over single-pathway compounds due to its ability to influence both GLP-1 and GIP receptor signaling.
Obesity Management
In animal models simulating diet-induced obesity, Tirz has been associated with significant reductions in body weight.
Researchers attribute this to a combination of reduced food intake mainly through delayed gastric emptying, appetite suppression, and increased energy expenditure, likely influenced by central and peripheral hormone signaling.
Unlike GLP-1only agonists, Tirz has been noted in some research models and anecdotal reports to preserve or improve energy levels, potentially reducing fatigue that may be observed with single-pathway incretin mimetics during long-term study periods.

Note: Anecdotal feedback from research participants and some observational studies have also reported episodes of reduced energy or mild fatigue during Tirz administration. These differences could reflect variability in individual response or dosing protocols within experimental designs.

Metabolic Syndrome Research
Tirz has also been studied in the context of metabolic syndrome, a cluster of conditions including elevated blood pressure, abnormal lipid profiles, insulin resistance, and excess body fat.
In preclinical trials, the peptide has been shown to influence multiple aspects of this syndrome by promoting insulin sensitivity, improving glucose utilization, and reducing markers of systemic inflammation. The dual-receptor approach may allow for more comprehensive modeling of metabolic corrections than GLP-1 agonism alone.
Diabetes Model Research
Several rodent studies have explored Tirz in type 2 diabetes models, where it demonstrated improvements in glucose tolerance, HbA1c levels, and pancreatic beta-cell function.
GIP receptor activation appears to enhance insulin release in a glucose-dependent manner, complementing GLP-1’s effects and potentially reducing the risk of hypoglycemia in certain models. Additionally, early-stage research suggests possible protective effects on pancreatic islet structure and function under chronic metabolic stress.
These findings are based on controlled laboratory research only. Tirz is not intended for human use or therapeutic applications.
Tirz Peptide Characteristics

Molecular Formula: C225H348N48O68
CAS Number: 2023788-19-2
Amino Acid Sequence:

39 amino acid linear synthetic peptide conjugated to a C20 fatty diacid moiety
Note: The full sequence includes proprietary modifications to enhance half-life and receptor activity.

Synonyms:

LY3298176
Dual GIP/GLP-1 receptor agonist
Tirz acetate (research form)

Molar Mass: 4813.5 Da (may vary slightly depending on salt form)
Storage Recommendations:

Store lyophilized peptide between 36F and 46F (2C and 8C) in a dry, sealed container. If storing long-term (months to 1-2 years), store below 0C.
Do not freeze the compounded form of tirz to avoid damaging it
Reconstituted solutions should be stored at 28C and used within a limited timeframe, depending on solvent and laboratory conditions.
Avoid repeated freeze-thaw cycles to maintain peptide integrity.

Remember, tirz is for research use only. Not for human use or therapeutic purposes.
Tirz vs Sema vs Reta (Comparison)

Feature

Sema

Tirz

Reta

Type

Single agonist (GLP-1)

Dual agonist (GLP-1, GIP)

Triple agonist (GLP-1, GIP, Glucagon)

Targets

Appetite, blood sugar

Appetite, blood sugar

Appetite, blood sugar, energy expenditure

Mechanism Complexity

Simplest (single action)

Moderate (dual action)

Most complex (triple action)

Research Stage

FDA Approved (Ozempic/Wegovy)

FDA Approved (Mounjaro)

Preclinical/Early Clinical Trials

Weight Loss Potential (Research)

High (1520% at 68 wks)

Very high (~20% over 72 weeks)

Potentially highest (24% at 48 wks in early trials)

Impact on Glucose Regulation

Strong

Strong

Strong (early studies)

Additional Effects

Cardiovascular benefits

Insulin sensitivity improvements

Increased energy expenditure (animal models)

Dosing Frequency

Weekly

Weekly

TBD (under investigation)

Approval Status

Approved medication

Approved medication

Research use only

Disclaimer

Approved for medical use

Approved for medical use

Research use only, not for human consumption

Safety and Side Effects in Studies
Current findings on Tirz are largely based on preclinical and early clinical research, with many insights drawn from animal models and laboratory-controlled studies. In these settings, Tirz has demonstrated a generally favorable safety profile, particularly at dosages typically used for research purposes.
Across various non-clinical models, adverse effects have been limited and not widely reported, with most subjects tolerating the compound well.
That said, it’s important to note that responses can vary depending on species, dosage, and experimental conditions. The absence of severe side effects in research contexts does not imply safety in humans.
Tirz is provided for scientific research only. It is not intended for human consumption, diagnostic use, or therapeutic treatment.
Certificate of Analysis (COA)
Each vial of Tirz peptide from Evolve Peptides is supported by a Certificate of Analysis (COA) to verify identity, purity, and molecular composition. Every batch undergoes independent third-party testing to confirm consistent quality, with purity levels that typically exceed 99.6%.
Researchers can request a COA with their order by directly contacting us, and we’ll provide one so you can conduct your research with confidence and data reliability.
Tirz FAQs
What is Tirz used for in research?
Tirz is studied for its dual action on GIP and GLP-1 receptors, which are involved in glucose metabolism, appetite regulation, and energy balance. Researchers explore its potential role in metabolic function, insulin signaling, and weight regulation under controlled lab conditions.
Is Tirz the same as GLP-1 agonists like Sema?
Not exactly. While both target GLP-1 receptors, Tirz also activates GIP receptors, making it a dual agonist. This broader mechanism is believed to enhance its effects on insulin sensitivity and appetite signaling in research models.
What’s the difference between Tirz and Reta?
Tirz is a GIP/GLP-1 dual agonist, while Reta is a triple agonist that also includes glucagon receptor activation. This means Reta may influence energy expenditure and fat metabolism in ways Tirz doesn’t, according to early studies.
How is Tirz stored for research?
Lyophilized Tirz should be stored in a cool, dry place, typically -20C for long-term storage. Once reconstituted, it should be used promptly and stored under sterile, refrigerated conditions, as per lab protocol.
Scientific References

Meloni, A. R., DeYoung, M. B., Lowe, C., & Parkes, D. G. (2013). GLP-1 receptor activated insulin secretion from pancreatic -cells: mechanism and glucose dependence. Diabetes, Obesity and Metabolism, 15(1), 1527.
https://doi.org/10.1111/j.1463-1326.2012.01663.x
Paula-Peace James-Okoro, Jo Edward Lewis, Fiona Mary Gribble, Frank Reimann. Frontiers in Endocrinology. (2025). The role of GIPR in food intake control. Frontiers in Endocrinology. Volume 16 2025
https://doi.org/10.3389/fendo.2025.1532076 https://www.frontiersin.org/articles/10.3389/fendo.2025.1532076/full
Baggio, L. L., & Drucker, D. J. (2014). Glucagon-like peptide-1 receptors in the brain: controlling food intake and body weight. The Journal of Clinical Investigation, 124(10), 42234226.
https://doi.org/10.1172/JCI78371
https://www.jci.org/articles/view/78371
Ailin Zhang, Qinhui Liu, Yimin Xiong, Jiahui Li, Ying Xu, Haiying Song, Xiandan Jing, Haixia Xu, Na Yang, Yanping Li, Li Mo, Qin Tang, Jinhan He (2025). Tirz reduces body weight by increasing fat utilization via the central nervous system-adipose tissue axis in male mice. Diabetes Obes Metab. 2025 May;27(5):2844-2856. doi: 10.1111/dom.16294. Epub 2025 Feb 25.
https://pubmed.ncbi.nlm.nih.gov/40000395/
Jalleh, R. J., Plummer, M. P., Marathe, C. S., Umapathysivam, M. M., Quast, D. R., Rayner, C. K., Jones, K. L., Wu, T., Horowitz, M., & Nauck, M. A. Journal of Clinical Endocrinology and Metabolism. (2025). Clinical Consequences of Delayed Gastric Emptying With GLP-1 Receptor Agonists and Tirz. The Journal of Clinical Endocrinology & Metabolism, Volume 110, Issue 1, January 2025, Pages 115,
https://doi.org/10.1210/clinem/dgae719
https://academic.oup.com/jcem/article/110/1/1/7824836
[PMC Article]. (2025). Tirz for MAFLD. Clinical Consequences of Delayed Gastric Emptying With GLP-1 Receptor Agonists and Tirz, Volume 110 Issue 1, https://pmc.ncbi.nlm.nih.gov/articles/PMC10923294/
De Block, C., Bailey, C., Wysham, C., Hemmingway, A., Allen, S. E., & Peleshok, J. PMC Article. (2025). Tirz for the treatment of adults with type 2 diabetes: An endocrine perspective. Diabetes Obes Metab. 2023 Jan;25(1):3-17. doi: 10.1111/dom.14831. Epub 2022 Aug 31. https://pmc.ncbi.nlm.nih.gov/articles/PMC10087310/
UCLA Health. (2025). Sema weight loss: What you need to know. https://www.uclahealth.org/news/article/sema-weight-loss-what-you-need-know
Ghusn, W., De la Rosa, A., Sacoto, D., Cifuentes, L., Campos, A., Feris, F., Hurtado, M. D., & Acosta, A. [PMC Article]. (2025). Weight Loss Outcomes Associated With Sema Treatment for Patients With Overweight or Obesity. National Library of Medicine. Volume 5(9).
https://pmc.ncbi.nlm.nih.gov/articles/PMC9486455/
Emily Harris. JAMA Network. (2025). Triple-Hormone Combination Reta Induces 24% Body Weight Loss. JAMA. 2023;330(4):306. doi:10.1001/jama.2023.12055. https://jamanetwork.com/journals/jama/article-abstract/2807151