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Traditionally used to treat sexual dysfunction and infertility, new scientific research shows how the active ingredient in Andro400 improves immune system function.

In a randomized, double-blind, placebo-controlled study, 84 men and women with low scores according to the Scoring of Immunological Vigor (SIV) ingested either 200 mg/day of the primary ingredient in Andro400, Eurycoma longifolia, or a placebo.

After 4 weeks, healthy T cells and overall immunological grade were significantly higher in the E. longifolia group. In fact, after just 4 weeks, the E. longifolia group lowered their immunological age by 4 years. No significant changes were observed in the placebo group, and no adverse side-effects were reported. (1)

Enhanced Immunity

The results suggest that the active ingredient in Andro400 enhances comprehensive immunity in middle-aged men and women.

Your immune system protects you from all diseases, from influenza and pneumonia to rheumatoid arthritis and cancer. It also weakens with age, so it is important to maintain a highly functioning immune system for your overall health and quality of life. (2)

Studies show how the traditional herb in Andro400 boosts your body’s ability to heal, so you can continue to enjoy all the benefits of increased testosterone — such as more muscle and energy, better heart health, and fat loss — and avoid the dangerous side effects of prescription TRT, such as increased risk of prostate cancer and heart disease. (1, 3)


Brought to you by ANDRO400 – the safe, natural and affordable way to boost your testosterone without dangerous side effects.

About Andro400

Since 2004, Andro400 has been the leader among natural testosterone boosters with a proven track record of successfully helping tens of thousands of customers increase their testosterone safely without side effects. Andro400 contains only the most highly researched and time-tested ingredients proven to naturally increase T levels. Enjoyed by men (and women) of all ages and results are backed by the industry’s leading Satisfaction Guarantee. For more information about Andro400, please visit or call 877-711-3173.


(1) George, Annie, et al. “Immunomodulation in Middle-Aged Humans Via the Ingestion of Physta® Standardized Root Water Extract of Eurycoma longifolia Jack—A Randomized, Double-Blind, Placebo-Controlled, Parallel Study.” Phytotherapy Research (2016).
(2) Harvard Health Publications. “How to boost your immune system.” Harvard Medical School. n.d.
(3) Henkel, R. and George, A. “Phytoandrogenic properties of Eurycoma longifolia as natural alternative to testosterone replacement therapy.” Andrologia. 46: 708–721. doi: 10.1111/and.12214.

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