There are many studies that indicate even high physiological levels of testosterone lower immune response. First google search
https://med.stanford.edu/news/all-n...ean-weakened-immune-response-study-finds.html
Something I've had a while, seems relevant to this discussion:
Males and females differ in their immune responses, as females have been shown to develop stronger immune responses, have higher concentrations of immunoglobulins and have a higher incidence of autoimmune disorders..
Besedovsky H.O., Del Rey A., Immune-NeuroEndocrine Interactions: Facts and Hypotheses, Endocr. Rev., 1996, 17, 64-102
Bouman A., Jan Heineman M., Fass M.M., Sex hormones and the immune response in humans, Hum. Reprod. Update, 2005, 11, 411-423
This suggests that sex hormones play a role in regulating immune function. Clinical and experimental evidence suggests that gonadal steroids regulate immunological function..
Grossman C.J., Interactions between gonadal steroids and the immune system, Science, 1985, 227, 257-261
Lahita R.G., Sex steroids and rheumatic disease, Arthritis Rheum., 1985, 28, 121-126
Some studies suggest that AAS are immunosuppressive,
Fujii H., Nawa Y, Tsuchiya H., Matsuno K., Fukumoto T,. Fukuda S., et al., Effect of a single administration of testosterone on the immune response and lymphoid tissues in mice, Cell.
Immunol., 1975, 20, 315-326
Hirota Y., Suzuki T., Chayano Y., Bito Y., Humoral immune responses characteristic of testosterone propionate-treated chickens, Immunology, 1976, 30, 341-348
Schuurs A.H., Verheul H.A.M., Effects of gender and sex steroids on the immune response, J. Steroid Biochem., 1990, 35, 157-172
while others suggest that AAS enhance immune function.. (take note you cocky twat)..!!
Calabrese L.H., Kleiner S.M., Barna B.P., Skibinski C.I, Kirkendall D.T., Lahita R.G., et al., The effects of anabolic steroids and strength training on the human immune response, Med. Sci. Sport Exerc., 1989, 21, 386-392
However, the nature of their effects on the immune system depends on the type of AAS used and the dose and timing of administration. It has been shown that different AAS can act in either immunosuppressive or immunostimulatory manner [52,102,103,107].
Hughes T.K., Fulep E., Juelich T., Smith E.M., Stanton G.J., Modulation of immune responses by anabolic androgenic steroids, Int. J. Immunopharmacol., 1995, 17, 857-863
Fujii H., Nawa Y, Tsuchiya H., Matsuno K., Fukumoto T,. Fukuda S., et al., Effect of a single administration of testosterone on the immune response and lymphoid tissues in mice, Cell.
Immunol., 1975, 20, 315-326
Mendenhall C.L., Grossman C.J., Roselle G.A., Hertelendy Z., Ghosn S.J., Lamping K., et al., Anabolic Steroid Effects on Immune Function: Differences between analogues, J. Steroid
Biochem. Molec. Biol., 1990, 37, 71-76
Malcolmson C., Satra C., Kantaria S., Sidhu A., Lawrence M.J., Effect of oil on the level of solubilization of testosterone propionate into oil in-water microemulsions, J. Pharm. Sci., 1997, 87, 109-116
In summary, the literature concludes that AAS use influences immunological function. However, their effects vary according to the dose and type of AAS administered. The vast majority of studies suggest that AAS use decreases antibody formation, NK activity, T and B lymphocyte maturation and stimulation resulting in immunosuppression. Further, supraphysiologic doses of common AAS have been shown to directly influence the production of certain cytokines, altering immune function...
https://link.springer.com/article/10.2478/s11535-008-0058-x