Hidden Hazards: Heavy Metals, EMF & Blue Light

"In all these things, it is important to separate fact from fiction as you draw your own conclusions." — Kurt Bravata, M.D., Live Free or Diet

Mercury

Long-term mercury exposure causes neurological damage, mood swings, and cognitive impairment. Limit high-mercury fish (tuna, swordfish, king mackerel) to no more than one serving per week.

Lead

"Lead exposure can cause learning and behavioral problems, lower IQ, and delayed growth and development in children." — Live Free or Diet

If you live in a home built before 1978, have your water tested.

EMF and Wi-Fi

"Some studies have linked EMF exposure to an increased risk of certain types of cancer, including brain tumors. EMFs can interfere with your body's natural sleep-wake cycle."

Practical steps: turn off Wi-Fi at night, use wired connections, keep electronics out of the bedroom, practice grounding.

Blue Light

Blue light suppresses melatonin and disrupts the circadian rhythm. Use blue light filters, practice the 20-20-20 rule, and limit screen time in the evening.

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Read the full chapter: Live Free or Diet by Dr. Kurt Bravata, M.D. is available at [livefreeordietbook.com](https://livefreeordietbook.com) and on [Amazon](https://www.amazon.com/dp/9798385040568).