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Dr. Chet’s Health Memos

If it’s in the health news today, I’ll be writing about it as soon as I read the research, both old and new. With my email Health Memos, you’ll know more about making lifestyle choices that will help you get and keep good health. These free, concise updates on health are emailed to subscribers twice a week. Subscribe today and get a free MP3, in English or Spanish, of Dr. Chet’s Top Ten Tips—Small Changes for a Healthier Life.

VitaminD-COVID

Does Vitamin D Beat COVID?

March 17, 2026/in Memos/by Chet Zelasko

My Monday morning news feed contained at least three referrals to a recent article published in the Journal of Nutrition. The headlines were all about the same: vitamin D supplementation is ineffective in the short term as a treatment for COVID but provides insight into how to reduce the risk of long-term COVID symptoms. I […]

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https://www.drchet.com/wp-content/uploads/2026/03/VitaminD-COVID.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-03-17 06:00:002026-03-16 15:52:02Does Vitamin D Beat COVID?
2015-2025-Guidelines

What Changed? 2015 vs. 2025 Dietary Guidelines

March 14, 2026/in Memos/by Chet Zelasko

If you read any of the commentary about the latest dietary guidelines, you would have thought there were radical changes. “Eat or drink full-fat dairy! Use beef tallow! Ultra-processed food should be eliminated!” If you took the time to read the synopses, there are very few differences between the recommendations. They still use the same […]

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https://www.drchet.com/wp-content/uploads/2026/03/2015-2025-Guidelines2.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-03-14 06:00:002026-03-09 18:06:22What Changed? 2015 vs. 2025 Dietary Guidelines
2015-2025-Guidelines

The 2015 and 2025 Dietary Guidelines

March 10, 2026/in Memos/by Chet Zelasko

What were the Dietary Guidelines that were published for 2015? Can you remember any of them? What are the Dietary Guidelines for 2025? Did you read them? Here’s your chance. The 2015 Dietary Guidelines were released 10 years ago; the 2025 version about a month ago. Research was reviewed. Meetings were held. Comments were given. […]

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https://www.drchet.com/wp-content/uploads/2026/03/2015-2025-Guidelines.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-03-10 06:00:002026-03-09 18:00:55The 2015 and 2025 Dietary Guidelines
HeartClock

Clock-Changing Solutions

March 7, 2026/in Memos/by Chet Zelasko

We’ve become so obsessed with sleep, even our watches can track the amount of quality sleep we get, so we can expect something unusual tonight. We go to bed at our usual time and for most of us in the U.S., we wake up one hour earlier than planned because the clocks have changed. As […]

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https://www.drchet.com/wp-content/uploads/2026/03/HeartClock.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-03-07 06:00:002026-03-02 16:18:48Clock-Changing Solutions
TimeChange

Warning: Spring Ahead

March 3, 2026/in Memos/by Chet Zelasko

This coming weekend, the clocks are moved ahead one hour in most states here in the U.S. This seems to impact some people more than others; our bodies are more sensitive to the effects of changing sleep patterns than we think. I first wrote about this 10 years ago, and I wanted to check to […]

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https://www.drchet.com/wp-content/uploads/2026/03/TimeChange.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-03-03 06:00:002026-03-02 16:14:55Warning: Spring Ahead
Vitamin-C-Foods

Immune Booster 2 and 3

February 28, 2026/in Memos/by Chet Zelasko

Continuing with our look at how to approach the first tickle of a cold or seasonal allergies, we’ll finish up with the final two parts of our immune boosting supplements. Garlic The second part of our immune boost supplements is garlic; it’s been noted to have beneficial properties for over 5,000 years. Garlic thins the […]

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https://www.drchet.com/wp-content/uploads/2026/02/Vitamin-C-Foods.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-02-28 06:00:002026-02-23 16:41:06Immune Booster 2 and 3
Echinacea2

Immune Booster 1: Echinacea

February 24, 2026/in Memos/by Chet Zelasko

Just like nine years ago when I first wrote this, the cold and flu season is still around. The seasonal allergy season is right around the corner and may have started, depending on where you live. When you feel that first tickle in the back of your throat, that first nasally sensation, that’s when you […]

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https://www.drchet.com/wp-content/uploads/2026/02/Echinacea2.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-02-24 06:00:002026-02-23 16:36:04Immune Booster 1: Echinacea
Dairy-Foods

The Bottom Line on Full-Fat Dairy

February 21, 2026/in Memos/by Chet Zelasko

If you’re a long-time reader, you know that science by headlines really annoys me because they often distort the findings of the research papers to make them seem more important than they are—gotta get that next click! It doesn’t help that research institutions send out press releases that contribute to the hype of their research […]

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https://www.drchet.com/wp-content/uploads/2026/02/Dairy-Foods.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-02-21 06:00:002026-02-16 14:04:02The Bottom Line on Full-Fat Dairy
Whole-Milk

Does Whole Milk Reduce Obesity?

February 19, 2026/in Memos/by Chet Zelasko

The second research paper that was included in many news articles that talked about the potential benefits of full-fat dairy products was a study from the Women’s Health Study (1); researchers collected dietary data and self-reported weight and height from over 39,000 women. The analysis included only about 18,000 middle-aged and older women who had […]

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https://www.drchet.com/wp-content/uploads/2026/02/Whole-Milk.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-02-19 06:00:002026-02-16 13:58:19Does Whole Milk Reduce Obesity?
Cow-Question

Does Whole Milk Reduce Diabetes?

February 17, 2026/in Memos/by Chet Zelasko

Full-fat foods are back in the headlines in light of the recent proclamations by the USDA. I don’t know about you, but it’s been decades since I drank whole milk or ate whole fat yogurt or cheese. It’s not just about the calories; it just doesn’t seem to taste as good. Have I been missing […]

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https://www.drchet.com/wp-content/uploads/2026/02/CowQuestion.jpg 630 1200 Chet Zelasko https://www.drchet.com/wp-content/uploads/2017/08/Logo-cz.jpg Chet Zelasko2026-02-17 06:00:002026-02-16 13:54:18Does Whole Milk Reduce Diabetes?
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