Tag Archive for: cardiovascular disease

News on Food as Medicine

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As a conventional medical journal and one of the leading medical journals in the world, The Journal of the American Medical Association doesn’t often publish reviews of the impact of food on health. However, a recent edition of the Journal included a summary of three such studies, and that’s the topic for this week.

The first study examined whether mushrooms, which are full of vitamins, minerals, and phytonutrients, decrease the risk of cardiovascular disease (CVD) or type 2 diabetes (T2D). The researchers re-analyzed the data from the Nurses’ Health Study and the Health Professionals Follow-up Study. When they compared more than five servings of mushrooms per day with less than one serving per day, they found no differences in the rate of symptoms or markers associated with CVD or T2D. One interesting note was that if mushrooms were substituted for meat, there was a decreased risk of T2D.

This is one of the first studies to acknowledge the problems with nutrition data in these types of studies. The data on mushrooms were only collected at the beginning of the studies; that doesn’t allow for comparisons over time. Further, the questionnaire didn’t allow for data on a variety of types of mushrooms. The best observation at this point is that we don’t know whether mushrooms or specific types of mushrooms are beneficial for reducing the risk of disease until more research is done.

We do know they’re good for you, so enjoy your mushrooms; sautéed mushrooms are a great addition to many dishes. Here’s another way to enjoy mushrooms: Creamy Mushroom Soup from the Health Info page at drchet.com. Check out the other recipes while you’re there.

We’ll look at another study on Thursday.

What are you prepared to do today?

        Dr. Chet

P.S. Don’t forget to complete the survey on Dr. Chet’s Traveling Health Show. I could be coming to a city near you in 2020! Click the link below to go to the survey.

Survey

Reference: AJCN https://doi.org/10.1093/ajcn/nqz057.

Should You Try Prescription Fish Oil?

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The final marketing point that the prescription fish oil supplement makes is that the DHA omega-3 fatty acid found in many heart healthy fish oil blends may raise LDL-cholesterol. That’s the cholesterol, known as the lousy cholesterol, associated with an increased risk of cardiovascular disease.

Based on the studies I read, there may be a small increase in LDL-cholesterol in some studies. What they fail to mention is that there’s more than one type of LDL-cholesterol. The small, dense LDL cholesterol has been shown to be associated in CVD even when LDL-cholesterol is in the normal range; the large and fluffy LDL-cholesterol seems to have no relationship with CVD. The supplement fish oils that contain DHA seem to raise only the large LDL-cholesterol. That has led other researchers to call the effect of fish oil on LDL to be cardioprotective at best and benign at worst.

The Issues with the Marketing of Rx Fish Oil

Every company wants to put their best foot forward and prescription fish oil is no different. In reviewing the marketing materials as well as the research, here are my concerns:

  • The results of the studies they cite show a decrease in triglycerides of 33%. The mean level of triglycerides in one of the studies was about 660 mg/dl. That means it dropped the mean level to 440 mg/dl. While statistically significant, there’s no way to know whether that’s clinically significant in reducing the overall risk of CVD because the studies were so short.
  • The company clearly states that this medication is clinically relevant only to people with triglycerides greater 500 mg/dl; that’s a very small percentage of patients who may have familial high cholesterol. For the typical person with high triglycerides, this medication is not appropriate. That doesn’t mean it’s illegal to prescribe it for people with triglycerides between 250 and 500, but there’s also no evidence that it’s better than a change in diet or exercise. Will it be prescribed only for people with high triglycerides? We’ll see.
  • The company did not run comparative studies against fish oil supplements or with diet and exercise alone. Seems like that would be obvious.
  • Finally, while there are programs to get this medication for lower prices, I checked with my prescription plan and the cost would be $375 per month. For that kind of money, you can have someone prepare healthy meals specifically designed to reduce your triglycerides or take a class to learn to prepare them yourself; you could definitely join and inexpensive gym and buy more fresh fruits and vegetables.

The Bottom Line

Similar to statin medications when they were introduced decades ago, prescription fish oil should be limited to a very specific part of the population with familial high triglycerides. That’s all—no one else.

As for fish oil supplements, the issues they point out in their marketing material are not significant. You never use dietary supplements to treat any disease, but that doesn’t mean they can’t help you compensate for nutritional deficiencies. There will be a difference in the quality of any supplement so make sure you choose a quality manufacturer.

For the bulk of the population to reduce their triglycerides, reducing refined carbohydrates, saturated fats, and alcohol, increasing vegetable and fruit intake, and getting some exercise will help most. Like I always say: Eat better. Eat less. Move more.

What are you prepared to do today?

        Dr. Chet

References:
1. http://dx.doi.org/10.1016/j.atherosclerosis.2016.08.005.
2. J Clin Endocrinol Metab. 2018 Aug 1;103(8):2909-2917.
3. Am J Clin Nutr. 2004 Apr;79(4):558-63.

Fish Oil: Medication versus Supplements

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Before I address the concerns about fish oil supplements put forth by the Vascepa® prescription omega-3 website, it’s important to understand that all prescription and over-the-counter medications have been approved by the U.S. Food and Drug Administration (FDA). That means they have spent a significant amount of money—sometimes over $1 billion—to prove that the treatment claims are significant, and you can’t take that away from them. But marketing is a different story, so let’s look at what they say.

“Fish oil supplements are not FDA-approved.” True; no dietary supplement is FDA-approved, but that doesn’t mean they’re not regulated. They also can’t make claims about curing diseases.

“Daily dose could require 10 to 40 capsules to equal the prescription EPA omega-3.” That depends on the brand purchased, so that critique is weak.

“Fish oil supplements can leave a fish-y aftertaste.” Really? It’s fish oil, what would you expect? (Keeping the supplements in the refrigerator may help with that as well as taking fish oil before meals.) They suggest that the oils turn rancid and that causes the taste, but they offer no proof of that claim.

The last critique they make of fish oil supplements is that “Many contain another omega-3 fatty acid called DHA.” They say DHA can raise LDL cholesterol. I’ll address that claim and provide some concerns I have with the prescription omega-3 and how it’s being marketed on Saturday.

What are you prepared to do today?

        Dr. Chet

Treatment for High Triglycerides

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Hypertriglyceridemia, the medical term for high triglycerides, is a risk for cardiovascular disease. Recently I spotted a health headline from a medical newsletter that read “Omega-3 Fatty Acid Medications Can Boost Cardiovascular Health.” The word that caught my attention was “medications” so I checked it out.

The article described the benefits of recently approved medications based on marine omega-3 fatty acids. I checked out the latest one called Vascepa®. This is a purified form of fish oil that, according to the data on its website, can lower triglycerides up to 33%. Sounds impressive.

Back to the newsletter article: the author interviewed the lead author of a review paper that stated that prescription omega-3s are effective in lowering high triglycerides. Then she went on to say to avoid omega-3s from dietary supplements because they haven’t been proven to lower triglycerides as the prescription omega-3s have.

The website for Vascepa went a lot further in criticizing omega-3 supplements. What were their objections? Is a prescription the best way to go to treat hypertriglyceridemia? That’s what I’ll cover the rest of this week.

What are you prepared to do today?

        Dr. Chet

Reference: https://www.medicalnewstoday.com/articles/326146.php

What Would You Invest in a Healthier Diet?

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Would you eat more vegetables and fruit if your health insurance paid for it? How about an overall healthier diet that also included whole grains, nuts and seeds, fish, and healthy oils? Would you eat healthier if it didn’t cost you more?

Researchers from Tufts and Harvard examined the potential cost and benefits of subsidizing 30% of the costs of both approaches in Medicare and Medicaid programs. This was a computer simulation using data from NHANES on dietary intake and the relationship to cardiovascular disease and type 2 diabetes. They used the CVD events and mortality data and the current costs of treatment. Then they created models, one with increasing vegetable and fruit intake and another increasing all the aforementioned food, to find out if a healthier diet would affect disease events, deaths, and costs associated with the treatments.

Their estimates found that over a lifetime, the vegetable and fruits model would prevent 1.93 million CVD events and 350,000 CVD deaths while saving $40 billion in healthcare costs. The healthy food model would prevent 3.28 million CVD cases and 620,000 CVD deaths, prevent 120,000 diabetes cases, and save $100 billion in healthcare costs.

However, the net cost of the first model—subsidies minus healthcare savings—would be $84 billion while the second would cost $111 billon. It would improve the quality of life, but at a price. It’s easy to get lost in big numbers so let’s bring it down to the individual. After deducting healthcare savings, it would cost $110 per person per year for the fruit and vegetable subsidy and $185 per person per year for the healthy foods model. Does that seem like a reasonable investment for a healthier life for everyone?

The unknowns are whether physicians would actually write the prescriptions for foods; they’re not known for their nutrition knowledge and have a tendency to look for a pharmaceutical solution. But I think that’s minor; the real unknown is whether people will actually buy healthier foods and eat them.

We’ll find out: $25 million has been set aside in the 2018 Farm Bill to run pilot programs. It will be years before we know the results, but it’s a start to see if the theoretical will meet the actual.


The Bottom Line

Using food to improve health and quality of life makes sense. Whether having insurance companies or government pay 30% for healthier foods will work, I’m not convinced. I get the reduction of CVD events and deaths that could potentially be saved and the reduction in healthcare costs, but I question the $100 billion price tag without a public health education program to go along with it. Maybe a better approach would be to invest in the public health education program to teach people and physicians how they can use food to be healthier.

But now you know how a healthier diet could affect your life. What are you prepared to do today?

        Dr. Chet

Reference: PLoS Med 16(3): e1002761. https://doi.org/10.1371/journal.pmed.1002761.

Drop and Give Me 41

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The study on firefighters, push-ups, and CVD was interesting—not only for the relationship between push-ups and CVD, but also for the other relationships between the number of push-ups and other variables. Here’s a summary:

As the number of push-ups increased:

  • Body mass index decreased
  • Systolic and diastolic blood pressure decreased
  • Blood sugar decreased
  • Total cholesterol, LDL-cholesterol, and triglycerides decreased
  • HDL-cholesterol increased

One more thing: age decreased as well. In other words, the men in the study who could do more push-ups were younger. Was that the real reason—they were younger so naturally they could do more push-ups? They accounted for age in the statistical analysis, so it doesn’t appear to be so.

Does this study show cause and effect? No, because it’s observational. What it shows is that the lifestyle of the subject is important in the development of CVD. The subjects who had the greatest reduced risk had the highest aerobic and strength fitness, which may be reflective of an overall healthy lifestyle. Because push-ups require no equipment, progress can be easily tracked in a physician’s office. That was the actual point of the study: a simple test that could be predictive of CVD among other factors.

Here’s my challenge to you. After you see how many you do as a baseline, work at doing push-ups every day until you can hit 41. If you can’t do one, start with knee push-ups, push-ups from an exercise ball or chair, or wall push-ups (stand more than an arm’s length from the wall). As you can get to 41 one way, move to the next more difficult type.

When you get to 41, send me an email saying you did it and I’ll send you a coupon code good for 30% off the Optimal Performance Program; Member and Insider discounts apply. I’ll take you at your word, no selfies and no videos. After all, the only person you would be cheating is yourself and your risk of heart disease. I know age doesn’t matter; one of my readers in his 80s can already do this challenge. All it takes is a little sweat equity. Check with your doctor and get started.

What are you prepared to do today?

        Dr. Chet

Reference: doi:10.1001/jamanetworkopen.2018.8341.

Push-Ups and CVD

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On Tuesday, I asked you to see how many push-ups you can do before you can’t do any more (if you’re fit enough with no real orthopedic issues). How did you do? I have torn biceps in both arms, but I managed to eke out 21. But you may be wondering why I asked you to do push-ups.

A study published in JAMA Online periodically tested a group of 1,500 firefighters between 21 and 66 in 2000 to 2007. They were given several tests including maximal exercise capacity, height, weight, blood pressure, blood glucose, and the number of push-ups they could do. They were tracked for 10 years.

Researchers divided the results into quintiles based on the number of push-ups. They found that as the number of push-ups increased, the rate of CVD decreased. While not all comparisons were statistically different, there was a definite pattern of benefit.

That wasn’t the only data that proved to be interesting in the study. I’ll finish it on Saturday, along with a challenge.

What are you prepared to do today?

        Dr. Chet

Reference: doi:10.1001/jamanetworkopen.2018.8341.

Once a Year, No Matter What!

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I was in the gym locker room recently when I heard a guy ask a question: “Can I use any locker or are they assigned?” I turned to see if he was talking to me, but another guy told him there were no assigned lockers and to use whatever is open. That’s when the locker seeker said, “I couldn’t remember because I’m here only once a year.”

I thought maybe he uses this gym only when he visits this area. Then I realized he meant he gets to the gym only once a year, probably making light of his infrequent visits. The problem is that seems to be what most Americans do: buy gym memberships and never use them.

That’s why a study just published this past week is important. Researchers examined a number of physical variables in a group of firefighters and tracked them for ten years; the goal was to look at factors related to cardiovascular disease. I’ll talk about that study this week.

In the meantime, if you’re fit enough with no real orthopedic issues, see how many push-ups you can do before you can’t do any more.

What are you prepared to do today?

        Dr. Chet

The Bottom Line on the 2018 Cholesterol Guidelines

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In Thursday’s Memo, I talked about the 2018 Cholesterol Guidelines and evidence-based medicine, focusing on the physician side of the treatment discussion. But I believe that’s not the most important part of the discussion; I think the critical part is the patient side. Here’s why.

The Cholesterol Guidelines focus on lifestyle changes first: a healthier diet, exercise, quitting smoking, and weight loss. That’s supposed to be the initial part of the potential treatment plan—lifestyle first. In other words, what will the patients do for themselves before the discussion leads to medications, especially statins?

The guidelines aggressively focus on the use of statins and other medications to get the LDL-cholesterol to desirable levels, so we have a dilemma during the discussion of a treatment plan. Do the physicians assume, based on experience, that the patients won’t do what they’re supposed to do to lower their risk of CVD and immediately prescribe medications? Or do the patients take the lifestyle route seriously and do what’s necessary to change their health?

To be blunt, we patients haven’t done our part. We lose weight and gain it back. We start to eat healthier and don’t sustain it. We start to exercise, but we let life get in the way and stop, or we push too hard and get injured and stop, or the weather turns colder or hotter and we stop. When we agree to change our health habits and then don’t follow through, we make our health issues worse—they’re still in there eating away at our lifespan and not being treated.

Don’t make promises you know you won’t keep; notice I didn’t say can’t keep, I said won’t keep. If you know in your heart you’ll never change your diet or keep up with exercise, the best thing you can do for your health is don’t delay: start taking the meds and start taking care of the problem.

Although I disagree with it, I get why physicians jump to meds. There’s only one way to change that: we have to prove them wrong when they assume we won’t stick to a healthier lifestyle.

The Bottom Line

The 2018 Cholesterol Guidelines put the responsibility for lowering the risk of CVD without medications in our hands—the patients. Work out a timeline with some concrete goals for each lifestyle area with your physician. It won’t be easy: regular exercise for life, eating better from now on, quitting smoking, plus getting to a normal weight and staying there will all take time and consistent effort. That’s okay because even if your risk of CVD is high, it doesn’t mean you drop dead tomorrow. Even if you fall into an at-risk scenario, I know you can do it. There are many tools to help you keep at it: an app, a workout buddy, a Facebook group, and more.

Instead of looking at your health challenge as an obstacle, look at it as an opportunity for better health. If you say you don’t want to take medications, this is your chance to prove whether you really mean it. I can’t guarantee you’ll never need the meds, but you can work your way down to a smaller dosage with fewer side effects.

It all depends on your answer to one question: what are you prepared to do today?

Dr. Chet

 

Reference: www.ahajournals.org/doi/pdf/10.1161/CIR.0000000000000625.

 

2018 Cholesterol Guidelines and Evidence-Based Medicine

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I was encouraged by the AHA’s new cholesterol guidelines for one reason: the promotion of a joint decision between patient and physician on a treatment plan if one was necessary. That’s the basic tenet of evidence-based medicine: any and all treatment plans should take into consideration the wishes and desires of the patient. Many factors can go into that—the age and current physical state of the patient, the financial cost of treatment, and the physical cost of treatment compared to the potential benefit.

The only concern I have is this: will that discussion actually take place as intended or will it be a one-sided conversation with the physician making the decision for the patient? Will the physician listen or ignore the patient’s views? Paula and I have a great primary care physician and specialists who always listen to us, but I know it’s not that way everywhere. It’s easy to say, “If he won’t listen, just find another doctor,” but that isn’t always an option in rural areas or if your health insurance limits your choice.

The physician side of evidence-based medicine is just half the story. I’ll give you my thoughts on the rest of the guidelines on Saturday.

What are you prepared to do today?

Dr. Chet
Reference: www.ahajournals.org/doi/pdf/10.1161/CIR.0000000000000625.