In a society dominated by screens, scientists and physicians are raising alarms about the potential dangers of blue light exposure.
Phones, computers and LED lighting emit blue light, which some researchers argue is damaging human health, fertility and even cognitive stability.
Dr. Jack Kruse, a neurosurgeon and advocate of decentralized medicine, shared his findings in an interview with Rift TV host Elijah Schaffer.
He outlined how blue light disrupts hormones, fertility, mental health, and, in his view, may even influence gender identity.
“Testosterone is destroyed by blue light exposure,” Kruse told Schaffer.
He explained that in the human visual system, photoreceptors contain chemicals called opsins.
When blue light strikes them, the detector melanopsin breaks off vitamin A.
“The vitamin A becomes a wrecking ball and it destroys your hormone panel,” he said.
This process, Kruse stated, damages a critical heme protein known as the CYP enzyme, which plays a vital role in hormone production.
“It dehydrates it, and iron changes its oxidation state. That’s the reason you can’t make your testosterone,” he said, comparing the effect to barren landscapes on Mars.
Kruse argues that society-wide exposure to artificial blue light—from classrooms to big-box retailers like Walmart—carries broad consequences.
“You tend to eat more food, you spend more money,” he said, describing how stores use blue light’s biological effects to drive consumer behavior.
Beyond shopping habits, he said blue light triggers stress responses that mirror survival instincts.
“Blue light puts you in a stress response, like it’s fight or flight,” Kruse said.
“It’s just like if a saber-tooth tiger was chasing you, but you don’t realize that light can cause that.”
He also linked blue light to changes in gender identity and sexual orientation.
“Vitamin A destroys the sex steroid hormones, and that’s actually why we have more kids that have pink hair, green hair, and are gay or bisexual or have bipolar disorder,” he said.
Blue light causes epigenetic changes that alter the body’s hormone balance, according to Kruse.
“It raises the hormones up to change gender ideation,” he explained.
“It is gearing the hormones to change the light ferry boats so that testosterone drops, the female sex steroid hormones drop. It’s flipping the progesterone, estradiol ratio.”
He emphasized that the retina, which is an extension of the brain, connects directly to the hypothalamus, the body’s hormonal control center.
This direct pathway, he argued, allows artificial light to impact brain signaling and hormonal output in powerful ways.
Kruse claims this hormonal disruption contributes to rising levels of gender dysphoria and sexual identity shifts among younger generations who grow up surrounded by screens and LED lighting.
He believes the heavy exposure to these light environments is driving measurable cultural and biological changes.
Infertility is another concern. “In your age group, infertility is off the chain,” Kruse said, pointing to falling fertility rates among young adults.
He described the widespread difficulty many couples face in conceiving as evidence of a light-driven health crisis.
For men, he said declining testosterone contributes to dysfunction.
“Guys can only get off watching porn… but when you put a beautiful woman in front of them, their penis doesn’t get erect,” Kruse told Schaffer.
He argued that this reflects how deeply blue light interferes with normal hormone regulation.
For women, Kruse said blue light is tied to conditions such as polycystic ovarian syndrome and other hormonal imbalances.
These conditions, he argued, not only affect fertility but also make pregnancies more difficult to sustain.
“They become infertile, and not only that, they can still have kids, but it’s very difficult,” he explained.
Kruse also pointed to the booming fertility industry as an indirect sign of the problem.
He described the growth of clinics, treatments and medical interventions as evidence that more couples are struggling to conceive naturally in the modern environment.
To counteract blue light’s effects, Kruse promotes exposure to natural sunlight, particularly at sunrise, as well as red light therapy.
“If you see the sunrise, you don’t have to know all the fancy reasons, biophysically, why that’s important… Your testosterone will rise, your sex steroid hormones will normalize… You’ll be more fertile,” he said.
He recommends red light devices from EMR-Tek and blue-blocking glasses to restore balance in the body.
“Every heme protein in your body loves the red light,” Kruse said.
Schaffer himself reported improved sleep after using blue-blocking glasses.
Kruse noted that El Salvador’s President Nayib Bukele has embraced similar ideas, replacing LED bulbs with incandescent lighting at his brother’s wedding for health reasons.
“He gave a convocation to his family and friends to tell them why he was doing that,” Kruse added, calling attention to the global scope of the issue.
Mental health is another area Kruse connected to blue light exposure.
“Free vitamin A is always associated with poor sleep,” he revealed, pointing to disrupted melatonin production, chronic insomnia, and an increased risk of suicide.
Sleep disruption was something Schaffer personally experienced, sharing that he woke every 45 minutes before using blue-blocking glasses.
He reported near-immediate improvement when he began wearing them, an example Kruse said demonstrated the effects of light on the human brain.
Kruse also tied rising suicide rates and increased cases of anxiety and depression to artificial light environments.
He argued that constant blue light exposure pushes the brain into a stressed, inflamed state that erodes long-term mental health.
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