What studies back this information?

Several studies have explored the effects of cell phone radiation on health, with particular attention to hormone levels and reproductive health. One meta-analysis reviewed outcomes across 18 studies involving 4,280 samples, focusing on radiofrequency waves and heat effects from smartphones. This analysis found that mobile phone use can reduce sperm count and quality, unrelated to usage time, suggesting that the proximity of phones to the body plays a significant role 1.

Additionally, research has shown that chronic exposure to cell phone radiation may impact hormone profiles, reducing levels of cortisol, thyroid hormones, prolactin, and testosterone. These changes could have implications for fertility and overall health, particularly notably affecting individuals' hormone levels based on their proximity to phones and radio frequency towers 2.

However, there remains some controversy and challenges in isolating these effects from other environmental factors, and ongoing research continues to evaluate the full extent of these impacts 3.