Research Use Only. This compound is not intended for human consumption or therapeutic use.
Where to Buy Testagen: Vendor Comparison & Research Info
Testagen is a short, bioregulatory peptide that has primary effects on the pituitary gland and ultimately the thyroid gland. As a result of its action on these two glands, Testagen is capable of normalizing testosterone production as well as thyroid hormone production in certain settings. By normalizing thyroid hormone production, Testagen has a moderate impact on the immune system. In these cases, Testagen can be conveniently thought of as resetting the pituitary gland to a more youthful state and thereby acting as an anti-aging peptide. Testagen is being researched for its ability to boost testosterone levels, improve thyroid hormone function, and stimulate the differentiation of stem cells in the immune system to improve immune function.
What is Testagen?
THIS PRODUCT IS INTENDED AS A RESEARCH CHEMICAL ONLY. This designation allows the use of research chemicals strictly for in vitro testing and laboratory experimentation only. All product information available on this website is for educational purposes only. Bodily introduction of any kind into humans or animals is strictly forbidden by law. This product should only be handled by licensed, qualified professionals. This product is not a drug, food, or cosmetic and may not be misbranded, misused or mislabeled as a drug, food or cosmetic.
Testagen
Testagen, as the name implies, is a testosterone boosting bioregulatory peptide. Like many short peptides, Testagen crosses both the cell and nuclear membranes to interact directly with DNA. Research shows that Testagen is able to stimulate the anterior pituitary gland to increase the release of thyroid stimulating hormone and, ultimately, T3 and T4 thyroid hormones. It does this even in the setting of no hypophyseal support, suggesting that it directly alters the expression patters of proteins in the pituitary gland, a function that may explain its effects on testosterone levels. Finally, because Testagen 20mg affects the pituitary gland, it has impacts on hemostasis and immunity, though these are less pronounced than its effects on thyroid stimulating hormone levels and testosterone.
Testagen Structure
Chemical Formula: C17H29N5O9 Molecular Mass: 447.2 g/mol PubChem CID: 123863700
Testagen and Thyroid Hormone
The thyroid gland, a part of the endocrine system, is important to metabolism, growth, and reproductive function. Dysfunction of the thyroid gland can lead to difficulties with memory and concentration, changes in heart rate, difficulty regulating body temperature, weight gain, high cholesterol levels, and trouble with reproductive function.
One of the many reasons that the thyroid gland malfunctions is due to failure of the pituitary gland, the gland that regulates it. In this case, levels of another hormone, TSH, decline and do not stimulate the thyroid gland. There are a number of reasons why this may happen, but research in birds suggests that the pituitary gland can be stimulated, directly, but administration of Testagen. Testagen appears to alter DNA expression profiles in the pituitary gland to raise TSH secretion. Studies show that this results in near-normal thyroid hormone levels[1], [2].
Testagen and Tesosterone Levels
Research suggests that Testagen may help to normalize testosterone levels and thus testicular function. This may be especially pertinent to aging men suffering from declines in testosterone levels and related problems like lower bone density, decrease muscle mass, erectile dysfunction, inhibited libido, problems with cognition, and decreased energy levels.
It is important to note that the benefits of Testagen on the pituitary gland may occur even if the dysfunction is caused by tumors, medications (e.g. steroids, morphine) infection, and or autoimmune conditions. Right now, research is in its early stages so it is difficult to delineate the specific settings in which Tesagen does and does not impact the pituitary gland.
Some or all of the benefit that Testagen has on testosterone levels may be directly linked to its effects on thyroid hormone levels. Research shows that hypothyroidism can lead to low testosterone levels that are subsequently normalized with thyroid hormone replacement therapy. Thyroid hormone replacement has also been shown to normalize free testosterone concentrations[3]. It stands to reason then that Testagen’s benefits on testosterone levels may, in fact, be attributable to its effects on thyroid hormone levels. More research needs to be completed in this area.
Testagen and the Immune System
Research by Dr. Vladimir Khavinson has shown that peptides are capable of penetrating both cell and nuclear membranes to interact directly with DNA[4]. This epigenetic regulation of gene expression extends to the genes responsible for cell differentiation. Testagen has been shown by Dr. Khavinson to help push stem cells to differentiate into cells of the immune system, indicating that the peptide could have potential positive benefits on immune function[5]. This function may be especially useful in elderly individuals experiencing senescence and loss of cell differentiation secondary to chromatin condensation.
By virtue of its effects on the immune system, Testagen may be said to have anti-aging properties. By improving immune function and immune surveillance, Testagen could help to reduce the risk of a number of autoimmune disease as well as cancers that tend to increase in prevalence with age. It is important to note that immune function is often tied to thyroid function and that low thyroid hormone levels are often associated with increased risk of infection and poor immunity. The impact of Testagen on thyroid hormone levels may be a secondary contributor to its beneficial effects on immune function.
Testagen and Blood Clotting
Dr. Boris Kuznik, who is now retired, did some of the preliminary work with Dr. Khavinson on the role of Testagen and similar peptides in the blood system. His specialty of clotting, which is not a function of the immune system per se but is closely related and is, to some extent, influenced by the thyroid gland, led him to explore the ability of Testagen to improve hemostasis (blood clotting). Early research suggests that Testagen is useful in this setting and may, in fact, be able to normalize hemostasis in certain disease conditions.
Testagen Summary
Testagen is a short, bioregulatory peptide that has primary effects on the pituitary gland and ultimately the thyroid gland. As a result of its action on these two glands, Testagen is capable of normalizing testosterone production as well as thyroid hormone production in certain settings. By normalizing thyroid hormone production, Testagen has a moderate impact on the immune system. In these cases, Testagen can be conveniently thought of as resetting the pituitary gland to a more youthful state and thereby acting as an anti-aging peptide. Testagen is being researched for its ability to boost testosterone levels, improve thyroid hormone function, and stimulate the differentiation of stem cells in the immune system to improve immune function.
Testagen exhibits minimal side effects, good oral and excellent subcutaneous bioavailability in mice. Per kg dosage in mice does not scale to humans. Testagen for sale at peptide Review hub is limited to educational and scientific research only, not for human consumption. Only buy Testagen if you are a licensed researcher.
Scientific Journal Author
Vladimir Khavinson is a Professor, President of the European region of the International Association of Gerontology and Geriatrics; Member of the Russian and Ukrainian Academies of Medical Sciences; Main gerontologist of the Health Committee of the Government of Saint Petersburg, Russia; Director of the Saint Petersburg Institute of Bioregulation and Gerontology; Vice-president of Gerontological Society of the Russian Academy of Sciences; Head of the Chair of Gerontology and Geriatrics of the North-Western State Medical University, St-Petersburg; Colonel of medical service (USSR, Russia), retired. Vladimir Khavinson is known for the discovery, experimental and clinical studies of new classes of peptide bioregulators as well as for the development of bioregulating peptide therapy. He is engaged in studying of the role of peptides in regulation of the mechanisms of ageing. His main field of actions is design, pre-clinical and clinical studies of new peptide geroprotectors. A 40-year-long investigation resulted in a multitude of methods of application of peptide bioregulators to slow down the process of ageing and increase human life span. Six peptide-based pharmaceuticals and 64 peptide food supplements have been introduced into clinical practice by V. Khavinson. He is an author of 196 patents (Russian and international) as well as of 775 scientific publications. His major achievements are presented in two books: “Peptides and Ageing” (NEL, 2002) and “Gerontological aspects of genome peptide regulation” (Karger AG, 2005). Vladimir Khavinson introduced scientific specialty "Gerontology and Geriatrics" in the Russian Federation on the governmental level. Academic Council headed by V. Khavinson has oversighted over 200 Ph.D. and Doctorate theses from many different countries.
Prof. Vladimir Khavinson is being referenced as one of the leading scientists involved in the research and development of Testagen. In no way is this doctor/scientist endorsing or advocating the purchase, sale, or use of this product for any reason. There is no affiliation or relationship, implied or otherwise, between peptide Review hub and this doctor. The purpose of citing the doctor is to acknowledge, recognize, and credit the exhaustive research and development efforts conducted by the scientists studying this peptide. Prof. Vladimir Khavinson is listed in [4] and [5] under the referenced citations.
Where to Buy Testagen Online
| Rank | Vendor | Trust Score | Vial Size | Price / mg | Status | Action |
|---|---|---|---|---|---|---|
1 | ![]() Dragon Peptides Verified | 9.0/10 Editorial Rating | $40.80 20mg vial | $2.04/mg | In Stock | Visit Site |
2 | ![]() Dragon Pharma Store Verified | 9.0/10 Editorial Rating | $38.00 20mg vial | $1.90/mg | In Stock | Visit Site |
Top-Ranked Vendor

At Dragon Peptides, we are committed to supplying high-quality research peptides and compounds to scientists, laboratories, and professionals worldwide. Our company was founded on the principles of reliability, transparency, and customer satisfaction. We work closely with trusted manufacturers and testing facilities to ensure every product we offer meets strict quality standards. Our goal is to provide a dependable source for research products while maintaining a user-friendly and secure online experience. We continually expand and refine our product selection to support evolving research needs.
Chemical Properties & Handling
Standard storage protocols for lyophilized peptides generally apply unless otherwise specified.
- Lyophilized (Powder): Store at -20°C for up to 3 years. Keep away from direct light and moisture.
- Reconstituted (Liquid): Store at 2-8°C (refrigerated) and use within 20-30 days to maintain stability.
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