Some studies say fluoride may contribute to hypothyroidism
Q: I have Hashimoto’s autoimmune hypothyroid disease. I did not feel well taking just Synthroid. When I started taking Unithroid along with a small dose of Cytomel, that worked much better for me.
Most doctors only test the TSH level and then treat that number. Testing free T4 and free T3 is a much better indicator of real thyroid activity.
I have heard that fluoride has a negative effect on the thyroid. Is that true?
A: Fluoride remains a controversial water treatment. On the one hand, dentists promote the use of fluoridated water and toothpaste to prevent tooth decay.
On the other hand, there is some data linking exposure to high levels of fluoride with an increased risk for hypothyroidism. A systematic analysis of 10 studies concluded: “The study has shown a positive correlation between fluoride and hypothyroidism, which is an alarming issue.” (Indian Journal of Dental Research, May-June 2018).
A recent study from Canada found that: “In this Canadian pregnancy and birth cohort, fluoride in drinking water was associated with risk of primary hypothyroidism in pregnant women.” (Science of the Total Environment, April 15, 2023) Scientists believe that fluoride may interfere with the deiodinase enzymes that convert inactive T4 hormone to active T3.
Q: You have written about the pros and cons of cortisone
injections. Have the effects on weight been studied? I had steroid shots in my knees every three months for two years. I recently compared notes with a friend who has a similar history. Both of us gained weight — 35 pounds for me and 40 pounds for her. My blood sugar rose and, sadly, my arthritis got worse. A:
Many people are under the impression that a corticosteroid injection into a joint has only local effects. In reality, such shots can affect the entire body. Some people report insomnia and anxiety after an injection. Others have trouble controlling their blood sugar. Prolonged corticosteroid treatment is also linked to weight gain (Allergy, Asthma & Clinical Immunology, Aug. 15, 2013).
Q: My doctor recently told me that my vitamin D levels are low. I have not been taking vitamins because I have to take blood pressure medicines and I hate taking pills. Do I really need to take vitamin D? Is there a gummy or
a liquid preparation that would be just as good as a pill? A:
Low vitamin D levels can contribute to a wide range of health problems, from muscle pain and an increased risk of infection to high blood pressure and kidney disease. We would encourage you to skip the gummies because ConsumerLab.com has found that they don’t always provide an accurate dose.
Nonetheless, if you need calcium as well as vitamin D3, L’il Critters and Kirkland (Costco) products both passed the ConsumerLab.com tests. We suggest you spring for the entire report, as the company updates it from time to time. They have recommended a liquid form, Source Naturals Vitamin D-3, as meeting labeling expectations.
The complete report is available at subscriptionbased www.ConsumerLab. com.