8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Whole Body / General

SUPPRESSION OF THYROID FUNCTION AND ADRENOMEDULLARY ACTIVATION BY LOW-INTENSITY MICROWAVE IRRADIATION

Bioeffects Seen

Lawrence N. Parker · 1971

Share:

1971 research found low-intensity microwave radiation could suppress thyroid function while activating stress hormone systems in rats.

Plain English Summary

Summary written for general audiences

This 1971 study examined how low-intensity microwave radiation affected thyroid hormone production and stress hormone systems in laboratory rats. Researchers measured changes in thyroid function alongside adrenal gland activity, particularly focusing on epinephrine production and related enzyme activity. The research represents early scientific investigation into how microwave exposure might disrupt critical hormone systems that regulate metabolism and stress response.

Why This Matters

This research from 1971 represents pioneering work examining how microwave radiation affects our most fundamental biological systems - the hormones that control metabolism and stress response. What makes this study particularly significant is its focus on low-intensity exposures, suggesting that even modest microwave levels could disrupt thyroid function and trigger stress hormone activation. The thyroid system controls virtually every aspect of cellular metabolism, while the adrenomedullary system governs our fight-or-flight response through epinephrine release.

The reality is that microwave radiation surrounds us daily through WiFi routers, cell phones, and microwave ovens - all operating at power levels that would have been considered 'low-intensity' in 1971 research terms. If microwave exposure can suppress thyroid function while simultaneously activating stress hormones, this creates a concerning biological contradiction: your body's energy production system slowing down while stress systems ramp up. This early research laid important groundwork for understanding how EMF exposure might contribute to metabolic disorders and chronic stress conditions we see increasing today.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Lawrence N. Parker (1971). SUPPRESSION OF THYROID FUNCTION AND ADRENOMEDULLARY ACTIVATION BY LOW-INTENSITY MICROWAVE IRRADIATION.
Show BibTeX
@article{suppression_of_thyroid_function_and_adrenomedullary_activation_by_low_intensity__g5943,
  author = {Lawrence N. Parker},
  title = {SUPPRESSION OF THYROID FUNCTION AND ADRENOMEDULLARY ACTIVATION BY LOW-INTENSITY MICROWAVE IRRADIATION},
  year = {1971},
  
  
}

Quick Questions About This Study

This 1971 study investigated exactly this question in laboratory rats, examining how low-intensity microwave exposure affected thyroid function. The research focused on measuring thyroid hormone suppression alongside stress hormone activation, suggesting microwave radiation could disrupt normal metabolic control systems.
The researchers specifically measured epinephrine (adrenaline) production and PNMT enzyme activity in the adrenal glands. They also tracked corticosterone levels, which is the primary stress hormone in rats equivalent to cortisol in humans, providing comprehensive stress system assessment.
Thyroid hormones control cellular metabolism throughout the body. When microwave radiation suppresses thyroid function as suggested in this study, it could slow down metabolic processes while simultaneously activating stress hormones, creating conflicting biological signals that may contribute to metabolic dysfunction.
This appears to be early research documenting how microwave radiation affects hormone systems, conducted when microwave technology was just entering widespread use. The study's focus on low-intensity exposures makes it relevant to everyday microwave sources we encounter today.
PNMT (phenylethanolamine N-methyltransferase) converts norepinephrine to epinephrine in adrenal glands. Measuring PNMT activity provided researchers a precise way to assess whether microwave exposure was triggering the body's fight-or-flight stress response at the cellular level.