Testagen is a peptide that affects the pituitary gland and the thyroid gland. As a consequence, it normalizes testosterone production, thyroid hormone production, and provides benefits to the immune system. The rejuvenating action on the pituitary gland allows Testagen to act as an anti-aging peptide.


Sequence: Lys-Glu-Asp-Gly
Molecular Formula: C17H29N5O9
Molecular Weight: 447.2 g/mol
CAS No: 75007-24-8
Peptide purity: Greater than 98%
Other details: No TFA Salt

Testagen is a bioregulatory peptide specifically designed to stimulate testosterone production and enhance thyroid function. It is distinguished by its ability to traverse both cellular and nuclear membranes, allowing it to interact directly with DNA. This direct interaction with genetic material enables Testagen to exert significant influence over various biological processes, including the stimulation of the anterior pituitary gland. This stimulation leads to an increased release of thyroid-stimulating hormone (TSH), which in turn elevates the levels of thyroid hormones T3 and T4. The peptide’s multifaceted role makes it a powerful tool for addressing hormonal imbalances and improving overall health and vitality.
Anti-Aging Effects
One of the most notable benefits of Testagen is its anti-aging properties. As the body ages, the production of key hormones such as testosterone and thyroid hormones often declines, leading to a range of age-related health issues. Testagen works by rejuvenating the pituitary gland, effectively resetting its function to a more youthful state. This rejuvenation enhances the production of both testosterone and thyroid hormones, contributing to improved energy levels, better muscle mass and strength, enhanced cognitive function, and overall vitality. The peptide’s ability to boost immune function further supports its anti-aging effects, making it a comprehensive solution for age-related decline.
Effects on Thyroid Function and Metabolism
The thyroid gland plays a crucial role in regulating metabolism, growth, and reproductive functions. Dysfunction in the thyroid can lead to significant health issues such as memory and concentration difficulties, changes in heart rate, problems with temperature regulation, weight gain, elevated cholesterol levels, and reproductive challenges. These issues are often linked to the pituitary gland’s failure to produce adequate levels of TSH. By stimulating TSH production directly, Testagen helps normalize thyroid hormone levels, thereby enhancing metabolic processes and improving overall health. This normalization of thyroid function can lead to better energy management, weight control, and cardiovascular health.

Effects on Testosterone Levels
Testosterone is a vital hormone for maintaining muscle mass, bone density, sexual function, and overall energy levels. As men age, testosterone levels naturally decline, leading to a range of health issues including reduced muscle mass, decreased bone density, erectile dysfunction, low libido, cognitive decline, and decreased energy. Testagen has been shown to effectively normalize testosterone levels by influencing the pituitary gland and enhancing the body’s natural hormone production mechanisms. This normalization can help alleviate the symptoms associated with low testosterone, improving quality of life and physical performance, particularly in older men.

Benefits for Blood Clotting
In addition to its hormonal benefits, Testagen has been shown to positively affect blood clotting processes. Research conducted by Dr. Boris Kuznik and others has highlighted the peptide’s potential in improving hemostasis, or blood clotting. This is particularly relevant in conditions where normal clotting processes are disrupted, such as in certain diseases or after exposure to specific medications. By enhancing the thyroid’s function and, consequently, its influence on the blood clotting mechanisms, Testagen can help maintain proper hemostasis and reduce the risk of bleeding complications.

Effects on the Immune System
The immune system’s effectiveness often declines with age, leading to an increased risk of infections and autoimmune diseases. Testagen has demonstrated significant potential in enhancing immune function by promoting the differentiation of stem cells into immune cells. This process is facilitated by the peptide’s ability to penetrate cellular and nuclear membranes and interact directly with DNA, regulating gene expression. The enhanced immune function resulting from Testagen use can help mitigate the effects of aging on the immune system, reducing susceptibility to infections and improving overall immune surveillance. Furthermore, since immune function is closely linked to thyroid function, the peptide’s positive effects on thyroid hormones also contribute to better immune health.

L.I. Fedoreyeva et al., "Penetration of short fluorescence-labeled peptides into the nucleus in HeLa cells and in vitro specific interaction of the peptides with deoxyribooligonucleotides and DNA" [PubMed]
B.I.Kuznik et al., "Effects of Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly peptides on hormonal activity and thyroid morphology in hypophysectomized mature and old birds" [PubMed]
A. Wayne Meikle "The interrelationships between thyroid dysfunction and hypogonadism in men and boys" [PubMed]
V.Kh Khavinson "Short cell-penetrating peptides: a model of interactions with gene promoter sites" [PubMed]

This product is intendend for lab research and development use only. These studies are performed outside of the body. This product is not medicines or drugs and has not been approved by the FDA or EMA to prevent, treat or cure any medical condition, ailment or disease. Bodily introduction of any kind into humans or animals is strictly forbidden by law. This product should only be handled by licensed, qualified professionals.
All product information provided on this website is for informational and educational purposes only.

Data sheet


Customers who bought this product also bought: