2) What are Lipids and How do They Relate to Atherosclerosis Part I
The more experience I get as a personal fitness trainer, the more I realize how confused people are about nutrition and especially fats. People are confused in part by the many popular diet books in which many different diets claim to be the only solution. Analyzing scientific evidence doesn’t always make things easier. I hope this short article helps provide some clarity regarding “lipids in the diet.”
The major sources of visible fats in our diets come from butter and margarine, vegetable oils, the visible fat in meat, and chicken skin. There is also fat (although not visible) in milk products, poultry, fish, nuts and seeds, and whole grain foods. The triacylglycerols (all fats and oils are composed of triesters of glycerol with three fatty acids) in meat, poultry, fish, dairy products, and eggs are mostly saturated while vegetable oils have a higher content of unsaturated fatty acids with no cholesterol. The U.S. Food and Drug Administration recommends a diet with not more than 30% from fats and oils and they further recommend not more than 10% of daily calories coming from saturated fat. In addition, the FDA recommends not more than 300 mg of cholesterol be included in the daily diet. One tip to reduce the amount of saturated fats in the diet is to use certain low fat food varieties. For example, 1% milk is a much wiser choice than whole milk. Both high-fat dairy products and egg yolks are high in cholesterol.
The FDA has found evidence of diets high in saturated fats and cholesterol being linked to heart disease as well as certain types of cancer. One thing for sure is that diets rich in saturated fat lead to higher blood-serum cholesterol while diets lower in saturated fat and higher in unsaturated fat can lower serum cholesterol level.
Atherosclerosis, a condition in which yellowish plaque forms within the larger arteries, is correlated with high levels of cholesterol. The result of atherosclerosis is an increased risk for a myocardial infarction (heart attack).
Following are the risk factors for heart disease:
High blood levels of cholesterol and low levels of high-density lipoproteins (HDLs)
Cigarette smoking
High blood pressure
Obesity
Low level of physical activity
Family history of early heart disease
The following are the current recommendations that individuals should strive for:
Total cholesterol
200 mg/dL or lower
LDL
160 mg/dL or lower
HDL
60 mg/dL or higher
Always remember that HDL is the good cholesterol and LDL is the bad. The way I remember that is HDL begins with H so you want them high (they are good). LDL begins with L so you want them low (they are bad). In other words, HDL fights the plaque from sticking to your arteries so the higher the better. LDL actually clogs your arteries so you want to keep your levels low (160 or lower).
To determine what your lipid profiles are, make an appointment with your physician to have some blood work done.
I hope you found this information to be helpful. Stay tuned for part II which will include some practical tips for a healthy heart.
Also, please let me know if you know anyone who would like to receive this newsletter. Either have them sign up or send their name and e-mail to me at billy@howtogetlean.com and I can send them an issue as a gift from you.
Until next time, be a Functional Fitness Freak,
- Billy Hofacker
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Hofe-Man Fitness Systems, LLC
Billy Hofacker, Certified Personal Trainer
Specializing in Mens Fitness Programs
Serving Lindenhurst, Long Island, Suffolk County, and New York
Lindenhurst, NY 11757-1672
Phone: 631-225-7831 • Fax 631-225-0693 • E-mail:
billy@howtogetlean.com