Sunlight Increases Testosterone Production

Sunlight Increases Testosterone

October 14th, 2009 – Interested in boosting your testosterone levels? Try Sunlight.

Research shows that testosterone levels are highest in men during the summer months of June though July. (1) In a study involving men between the ages of 19-30, researchers found that only 1 hour of sunlight exposure stimulated luteinizing hormone (LH) production by 69.5% (2) luteinizing hormone is the primary hormone that signals the testes to increase testosterone production.

Sunlight exposure is also the main source of vitamin D production in the body, and low vitamin D levels are a good indicator of insufficient sunlight exposure. Therefore, testing for vitamin D can be an excellent way to ensure you are getting enough sunlight for optimal testosterone levels.

The take home message – Get outside as much as possible!

-Eric Potratz
Founder & President


1. Variation in Levels of Serum Inhibin B, Testosterone, Estradiol, Luteinizing Hormone, Follicle-Stimulating Hormone, and Sex Hormone-Binding Globulin in Monthly Samples from Healthy Men during a 17-Month Period: Possible Effects of Seasons
Anna-Maria Andersson, et al
J. Clin. Endocrinol. Metab., Feb 2003; 88: 932 – 937.

2. Luteinizing hormone following light exposure in healthy young men
IY Yoon, et al.
Neurosci Lett, April 24, 2003; 341(1): 25-8

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