Thimerosal [Hg] Accumulates in Rat Brains, Study Reveals

Catherine Frompovich

One of the researchers with whom I network emailed an absolutely stunning article about how Thimerosal, a mercury preservative used in vaccines since the 1930s, caused impairment in the brains of neonatal Wistar and Lewis lab rats. Since mercury—and Thimerosal, in particular—is suspect in neurodevelopmental disorders in children, especially autism, this study corroborates what parents believe happened to their children as a result of vaccinations, vaccines, and adverse effects.

Click to Discover How to Claim Your Free Copy!

Researchers at the Department of Pharmacology and Physiology of the Nervous System, Institute of Psychiatry and Neurology, Warsaw, Poland, published the results of their study, Neonatal administration of a vaccine preservative, thimerosal, produces lasting impairment of nociception [pain sense] and apparent activation of opioid system [controls pain, reward and addictive behaviors] in rats in Brain Research, Volume 1301, 16 November 2009, Pages 143-151.  The authors are Mieszko Olczak, Michalina Duszczyk, Pawel Mierzejewski and Maria Dorota Majewska.

The researchers examined the pharmacokinetics [The process by which a drug is absorbed, distributed, metabolized, and eliminated by the body.] (1) for mercury in the brain, liver and kidneys.  Stunning information states Pharmacokinetic analysis revealed that Hg [mercury] from THIM[EROSAL] injections accumulates in the rat brain in significant amounts and remains there longer than 30 days after the injection. [Emphasis added]

According to the findings, Thimerosal injected into suckling and adult rats impairs sensitivity to pain due to activation of the opioid system that controls pain, reward and addictive behaviors.  Furthermore, in six-week-old rats, hypoalgesia [decreased sensitivity to pain] was induced, but gone after 14 days.

The important aspect of this study, I feel, is that the mercury load was calculated and injected into the rats that corresponded to what infants receive with vaccines in many countries, including Poland, and reflected the 2008 recommended vaccine immunization schedules in both the United States and Poland.  The mercury load was based upon what infants receive during vaccinations. The vaccines included Hepatitis B, DTP [diphtheria-tetanus-pertussis], Hib [Haemophilus influenza b], and MCV [meningococcal conjugate vaccine].

Finally we have a published study that nails Thimerosal to brain damage in rats.  When will the U.S. HHS, CDC, and FDA wake up to real science and stop hiding behind junk science that mercury, a neurotoxin, is not implicated in autism?  This rat study seems to parallel what happens to numerous children: Brain damage.


Brain Research, Volume 1301, November 16, 2009, pp. 143-151


1        The Free Dictionary by Farlex

About the author

Catherine J. Frompovich

Catherine J Frompovich is a retired natural nutritionist who earned advanced degrees in Nutrition and Holistic Health Sciences, Certification in Orthomolecular Theory and Practice plus Paralegal Studies. Her work has been published in national and airline magazines since the early 1980s. Catherine authored numerous books on health issues along with co-authoring papers and monographs with physicians, nurses, and holistic healthcare professionals. She has been a consumer healthcare researcher 35 years and counting. Catherine is an editor and writing consultant who helps authors get into publication. For numerous semesters she taught several writing courses for a suburban Philadelphia school district’s Adult Evening School. Her passion is assisting and guiding authors into print. Catherine’s latest book, A Cancer Answer, Holistic BREAST Cancer Management, A Guide to Effective & Non-Toxic Treatments, will be available on and as a Kindle eBook sometime in July 2012. Two of Catherine’s more recent books on are Our Chemical Lives And The Hijacking Of Our DNA, A Probe Into What’s Probably Making Us Sick (2009) and Lord, How Can I Make It Through Grieving My Loss, An Inspirational Guide Through the Grieving Process (2008).