6 Steps to a Healthy Heart

February is American Heart Month. Here is what we know, according to the National Institutes of Health:

Heart disease is the leading cause of death in the United States.

According to the Centers for Disease Prevention and Control,  25 percent of deaths in 2007 were due to heart disease.

You may be at increased risk for heart disease if:

• You have a family history of heart disease
• Your cholesterol levels are high, specifically total and LDL cholesterol
• You have diabetes
• You smoke
• Your diet is lacking in fiber and key nutrients
• You don't get enough exercise

You may not be able to change your genes, at least not at this point, but there are a few things that you can do to reduce your heart disease risks. Here are a few tips:

• Eat foods rich in omega-3 fatty acids. Choose both plant and animal sources to cover all bases.
• Control your blood sugar by eating the right balance of carbohydrates, protein and fat. Pay attention to the ratio of insulin to carbohydrate to avoid extreme highs and lows.
• Do not smoke. If you smoke, stop.
• Eat foods rich in fiber, healthy fats, vitamins, minerals and other functional plant compounds.
• Avoid trans fats, saturated fats and foods with large amounts of added sugar or salt.
• Stay physically active. Start by climbing stairs and pick up the pace of your steps when walking if you haven't been active for a while.

References

Centers for Disease Control and Prevention; National Vital Statistics Reports: Deaths: Final Data for 2007; Xu, et al., 2007

Heart Disease: The Cholesterol Link 2 - HDL Cholesterol

HDL Cholesterol
As mentioned in my previous blog (November 10, 2010) cholesterol is a waxy substance that is important for a number of vital functions, like forming vitamin D, hormone production and as part of the nerves and other cells in your body. High-density lipoprotein cholesterol, also known as HDL cholesterol or good cholesterol plays a vital role in lowering the risk of a heart attack or stroke.

On the other hand, high levels of LDL does just the opposite, causing the buildup of plaque in the arteries, which can then lead to a heart attack or stroke..

HDL Lowers Risk of Heart Disease and Stroke
HDL or good cholesterol appears to prevent cardiovascular disease by removing LDL cholesterol from the blood and recycling it in the liver. By removing the LDL cholesterol from your blood, HDL reduces the chances of plaque buildup and the risk of a heart attack or stroke.

HDL cholesterol should be above 40 mg/dL. If it is below 40 mg/dL, you risk of having a heart attack or stroke increases. The desirable ratio of HDL to LDL cholesterol is about 1 to 4 (1 mg/dl HDL to 4 mg/dl LDL cholesterol).

Improving Your HDL to LDL Ratio
One way to reduce your risk of heart disease is to improve the boost your HDL cholesterol and lower your LDL cholesterol. There are several things that you can do to achieve that goal - diet, exercise and lose weight if you are overweight.

Diet. One of the most important things you can do to reduce your LDL cholesterol is to avoid foods that contain trans fat and limit your intake of foods that are high in saturated fat and cholesterol. It is not enough to just reduce your intake of cholesterol, since your body makes most of the cholesterol that is in your blood. By limiting your intake of trans fat and saturated fat, you may be able to reduce the amount of cholesterol that your liver produces.

In addition to controlling your fat intake, it is also important to eat foods that are high-fiber, including fruits, vegetables, whole grains, nuts, seeds, dried beans and peas. F

Avoiding foods with added sugar (including high fructose corn syrup), and highly refined and processed foods, especially foods made with white flour is also important, especially if you are trying to cut calories to lose weight.

Exercise. Exercise can help to lower your cholesterol and improve the ratio of HDL to LDL cholesterol in your blood, improve blood circulation and strengthen your heart muscles.

Lose weight. If you are overweight, lose the excess body weight. Studies show that losing as little as 10 percent of your body weight can result in tremendous improvements in a number of health parameters, including lowering your total cholesterol and improving the ratio of HDL to LDL cholesterol.

Resources
Good vs. Bad Cholesterol
High Blood Cholesterol, Treatments
.

Heart Disease: The Cholesterol Link - LDL Cholesterol

What is LDL Cholesterol? 
Cholesterol is a waxy substance that is made by your liver and found in the cell membranes and blood. You can also get it from the foods you eat. Low-density lipoprotein cholesterol, or LDL cholesterol for short, is called bad cholesterol because if you have too much of this form of cholesterol in your blood, it can lead to a heart attack or stroke.

Cholesterol also travels through your body as high-density lipoprotein cholesterol or HDL cholesterol. HDL cholesterol is called good cholesterol because it has a favorable effect on your health. An important function is to clear the LDL or bad cholesterol from your blood. This can help to lower your risk of a heart attack or stroke.

The Good News About Cholesterol
You hear so much about the harmful effect of high cholesterol that you probably never stop to think that this substance could be of any good.  That is where you would be mistaken. In fact, you actually need cholesterol for a number of important functions. For example, cholesterol is used to make vitamin D. It is also used for making hormones like estrogen and testosterone, and is an important part of the structure and function of nerves and the membrane of every cell.

The Bad News About LDL Cholesterol - Plaque
LDL cholesterol becomes dangerous when there is too much in your blood. That is because when the levels get too high, it could cause plaque to build up in your blood vessels. This in turn can cause the arteries to become narrow and interfere with normal blood flow to your heart. When this happens, your heart may not get enough oxygen. As a result, it has to work harder and can become damaged from lack of oxygen and the increased work it must perform.

Another serious danger of plaque is that it can break away from the arterial wall, form a blood clot and block the flow of blood to vital organs like the heart or brain. The end result could be a heart attack or a stroke.

Reducing Your Risk of Cardiovascular Disease

You can reduce your risk of a heart attack or stroke by keeping your LDL cholesterol low and your HDL high.

What Your Cholesterol Numbers Mean
Knowing your cholesterol numbers can help you determine if you are at risk for cholesterol-related cardiovascular disease. A simple blood test can be done to measure your LDL and HDL cholesterol levels. Make a special effort to know your numbers and what they mean. The following information may be helpful. (I will discuss ways to lower your LDL cholesterol and raise your HDL cholesterol in the next blog.)

Total cholesterol:

Less than 200 mg/dL is considered desirable
200 - 239 is borderline high
240 mg/dL and above is high

LDL cholesterol:
Less than 100 mg/dL is optimal
100 to 129 near optimal
130 - 159 mg/dL is borderline
160 - 189 mg/dL is high
190 mg/dL and above is very high

HDL cholesterol:
60 and above is high, which means it is protective
40 mg/dL and above for men and 60 and above for women is good
Below 40 is bad

Next blog post: Heart Disease: The Cholesterol Link - HDL Cholesterol

Resources
Thematic review series: Brain Lipids. Cholesterol metabolism in the central nervous system during early development and in the mature animal
High Blood Cholesterol: What Is
What Your Cholesterol Levels Mean

The Health Benefits of Fiber

Overview

Millions of Americans are not getting the fiber they need sustain their health. In fact, you may be suffering, needlessly, from health problems that could easily be prevented by just eating more foods that are high in fiber and less sugar and other highly processed foods.

What is Fiber

Fiber is the insoluble part of carbohydrates that cannot be digested and absorbed. Although fiber is not absorbed from the digestive tract, it can affect your health in a number of ways, including binding with digestive waste and removing toxins from your body.

Types of Fiber

There are two main types of fiber – soluble and insoluble. Soluble fiber is fiber that can be dissolved in water and is found mostly in fruits. Insoluble fiber is more straw-like and is not soluble in water. Both soluble and insoluble fibers are important to your health.

Health Benefits of Fiber

Fiber is best known for its role in promoting regular bowel movements and preventing constipation.

In the process of moving waste from your gut, mops and traps bile, cholesterol, and other potentially toxic waste and moves through your colon and out of your body.

Another important benefit of fiber is controlling your blood sugar. It does so by slowing the breakdown of carbohydrates in the gut, so that sugar is absorbed more slowly. This helps to prevent potentially harmful spikes in your blood sugar.

Additionally, fiber also acts as a probiotic, which means it allows healthy bacteria to grow and reduces the amount harmful bacteria in the gut.

Numerous studies show that a diet rich in fiber may help to promote weight loss, reduce the risk of diabetes, high blood pressure, cardiovascular disease and colon cancer.

How Much Fiber Do You Need?

The National Research Counsel recommends that adult women consume 25 grams of fiber daily and that men get at least 35 grams. Children need smaller amounts.

Food Sources of Fiber

Fiber comes from plant foods. You can get the fiber you need by eating a diet rich in fruits and vegetables, whole grains, dried beans and peas, legumes, tree nuts and seeds.

Summary

Eat foods that are rich in fiber to keep your digestive tract healthy, prevent rapid spikes in your blood sugar, control your cholesterol and enjoy all of the other health benefits that you get from fiber. These benefits include weight loss and reducing the risk of colon cancer.

Simple Steps to Preventing Heart Disease

Overview

If you have a family history of heart disease, you may be at increased risk for developing the disease yourself. So, it is important for you to pay attention to other risk factors. In many cases, you may be able to prevent or delay the development of heart disease by following a few basic steps.

Know Your Risks

Family history is a known risk factor for heart disease. Other risk factors include obesity, diabetes, high cholesterol levels, particularly high LDL or bad cholesterol levels, and high triglycerides. A diet that is high in sugar, trans fat or saturated fat and low in dietary fiber can also contribute to heart disease. Studies suggest that low vitamin D levels may also put you at risk.

Tips for Making Your Diet Heart-Healthy

The American Heart Association and other healthcare experts have recommended a number of strategies to lower your risk for heart disease. Here are a few tips:

Weight Control. Lose weight if you are overweight. Small changes in your diet, coupled with exercise will help you to lose the weight and reduce your risk of heart disease.

Omega-3 fats. Increase your intake of omega-3 fats. Omega-3 fats are powerful anti-oxidants that help to reduce inflammation in your body; inflammation has been linked to plaque buildup and an increased risk of heart disease.

Fiber. Foods that are rich in fiber play a key role in controlling your cholesterol. Fiber helps to control cholesterol by slowing the absorption of fat and by binding with bile in the gut to reduce the production of cholesterol.

Saturated fats and trans fat. Saturated fat and trans fat can increase the level of cholesterol in the blood, lead to the buildup of plaque in the arteries and increase your risk for a heart attack or stroke. So do your best to avoid these fats.

Triglycerides. High triglyceride levels are common in people with diabetes. These fats have also been linked to heart disease. So, make a special effort to avoid these fats.

Sugar. Excess sugar can contribute to the development of heart disease by causing an increase in blood glucose and high insulin levels. Both high blood glucose and insulin have been associated with increased inflammation. This inflammation can lead to damage to the heart and blood vessels, thereby increasing your risk of heart disease.

Salt. Eating too much salt, specifically the sodium portion of the salt molecule, can lead to high blood pressure in certain individuals. High blood pressure results when the walls of the blood vessels get stiff, making it difficult for blood to pass through the arteries to the heart. When this happens, the heart can be damaged, resulting in a heart attack or a stroke.

Summary.

You can reduce your risk of heart disease by maintaining a healthy weight or losing weight if you are overweight, eating a a diet that is rich in natural fiber,and eating foods rich in omega-3 fats. Avoid consuming sodas and other sugary drinks or foods made with a large amount of sugar. Also, avoid trans fats and  foods containing large amounts of saturated. fat. You should also reduce your salt intake. And finally, stay active.

Health Benefits of Monounsaturated Fats from Avocado

Overview

Avocado is a fruit that offers tremendous health benefits. One of the key benefits of avocado is promoting cardiovascular health. This protection comes from its high content of monounsaturated fats.

Nutrients in Avocado

Avocados are rich in healthy monounsaturated fats, fiber and potassium, which help to control cholesterol and promote blood flow to the heart, brain and other organs.

Monounsaturated Fats

Monounsaturated fats found in avocado act as powerful antioxidants, mopping up free radicals and preventing them from damaging your heart and blood vessels. Monounsaturated fats also help to lower cholesterol levels and improve the ratio of HDL or 'good" cholesterol to LDL or "bad" cholesterol in the blood. 

Health Benefits

• Heart disease. Monounsaturated fats help to prevent heart disease and stroke by increasing HDL or "good" cholesterol, lowering LDL or "bad" cholesterol and reducing triglycerides.

• Skin health. Monounsaturated fats help to promote blood flow to your skin, build collagen and maintain healthier, smoother looking skin.

• Brain function. Monounsaturated fats may help to prevent or slow the  progression of dementia and Alzheimer's disease by improving blood flow to your brain and protecting your brain cells from oxidative damage.

• Weight loss. Despite it's high fat content, studies show you can lose weight on a diet that includes avocado. Simply substitute a about 3 thin slices of avocado for other fats in your diet. Avocados may also cause a decrease in appetite, which could result in fewer calories consumed, thus promoting weight loss.

Resources

High density lipoproteins (HDL) size and comp... PubMed result
Avocado consumption is associated with better .... The FASEB Journal
The effects of various avocado oils on skin collagen

Health Benefits of Resveratrol

Overview

Resveratrol is a powerful antioxidant that helps to prevent heart disease and may provide a number of other health benefits, as well. Red wine has a high concentration of resveratrol from grapes.

Health Benefits of Resveratrol

Studies show that resveratrol promotes health by protecting cells in your body from oxidative damage. The effects of resveratrol in protecting the heart and blood vessels is clear. On the other hand, the effect on cancer. obesity and other diseases is not so clear. 

• Heart disease. Resveratrol in red wine promotes heart health by reducing “LDL or ‘bad” cholesterol and increasing HDL or “good” cholesterol. Studies show that resveratrol may also work by reducing inflammation in the cells. Inflammation is a major cause of a number of chronic diseases, including heart disease and cancer.
• Cancer. Laboratory studies show that resveratrol can prevent the growth of cancer in cell culture and in some laboratory animals by interfering with the ability of cancer cells to multiply and grow. However, further investigations will be needed to determine if the same effects can be achieved with humans.
• Obesity. Resveratrol might help to prevent or treat obesity, based on studies in rats in which  resveratrol prevented fat cells from maturing. Resveratrol also appears to change the size and function of fat cells. However, researchers caution that more studies would be needed to determine the long-term effects of such treatment on humans.

Food Sources of Resveratrol

The most common food sources of resveratrol are red wine, grapes and purple grape juice. Other sources include berries, such as blueberries and cranberries.

A Word About Drinking

Red wine is a good source of resveratrol and offers real health benefits to people who drink responsibly. It is also an alcoholic beverage, which means it has the potential for abuse. Excessive drinking could lead to alcoholism, liver damage and other serious health problems. Recognizing these potential dangers, the American Heart Association and others caution against drinking too much. The recommended limit for those who drink is one drink (12 ounces of wine) per day for women and 2 drinks (24 ounces of wine) per day for men.

Resources

Linus Pauling Institute at Oregon State University
Biochem Biophys Res Commun. 2003 - PubMed result

The Endocrine Society