Cholesterol Too Low – What are the dangers of a too low cholesterol?
Cholesterol Too Low – Cholesterol is often viewed as “bad” these days and many people are doing everything they can to lower cholesterol levels as much as possible. This isn’t necessarily a good thing.
Cholesterol is essential for many normal bodily functions. Enzymes use cholesterol to produce vitamin D, steroid hormones (estrogen, progesterone, testosterone), stress hormones, and bile acids for digestion. Cholesterol forms a membrane that surrounds all cells and is also a critical part of regenerating damaged endothelial cells (inner layer of blood vessel walls).
For most individuals, if you do not eat enough dietary cholesterol the liver produces the cholesterol needed for bodily functions. The amount of cholesterol in your diet determines how much the liver produces.
Cholesterol is essential for optimal health and pushing levels too low can cause problems. Back in 1994, the American Heart Association issued a statement noting an increase in deaths from trauma, cancer, hemorrhagic stroke, respiratory diseases, and infectious diseases in individuals with cholesterol levels less than 160 mg/dl. It’s worth noting that a large number of these deaths seemed to be due to poor health unrelated to the low cholesterol levels.
However, since then many studies are linking low cholesterol levels with depression, suicide, impulsivity, aggression, and anxiety when levels drop below 160 mg/dl. One psychologist suggested having too low cholesterol alters brain cell function and the brain cells with low cholesterol levels may have fewer receptors for the mood-elevating neurotransmitter serotonin. This could be the reason low cholesterol levels increase rates of depression.
With the rapidly rising use of medications, such as statin drugs, I’m noticing individuals reporting cholesterol levels that are dropping into potentially dangerous territory. Work with your physician to ensure you maintain healthy cholesterol levels appropriate for you.
Be sure to sign up for the free e-course How to Lower Cholesterol in 8 Simple Steps.
All the best,
Lisa Nelson RD
Heart Healthy Tips
Heart Disease – Does green tea lower heart disease risk?
All right, this green tea article has been hanging over my head for at least a month now. I just couldn’t get motivated to wade through all the research to determine if yes, this is an effective way to lower cholesterol and prevent heart disease, or no, it’s just a lot of hype.
Well, I sat down and sorted it all out today and here’s what I found.
Health Claim
The proposed health claim for green tea is that drinking at least 5 fluid ounces as a source of catechins may reduce risk factors associated with cardiovascular disease.
What are catchins?
Green tea contains catechins, which are a type of flavenoid with antioxidant properties. Antioxidants slow the oxidation process. The oxidation of LDL molecules is what results in plaque formation. Therefore, increasing antioxidant intake should slow oxidation of LDL, resulting in less arterial plaque formation.
Also, when molecules are oxidized, free radicals are released that damage cells. These free radicals can increase inflammatory issues associated with cardiovascular disease.
How flavenoids work
The body recognizes flavenoids as foreign particles and works to eliminate them from the body. Flavenoids themselves do not act as an antioxidant and they are poorly absorbed by the body. However, the proposed benefit of extra flavenoids is that as the body eliminates the unwanted flavenoids, damaging free radicals are also eliminated.
Tea production
The various types of tea are produced differently. The leaves of oolong tea and black tea are allowed to oxidize (enzymes in the tea change catechins to larger molecules). Green tea is not oxidized, but produced by steaming fresh-cut leaves whereby enzymes are inactivated and little oxidation occurs. The least processed tea is white tea, which contains the highest levels of catechins. Green tea contains the second highest catechin level, approximately 125 mg catechins per serving (or ~25% dry weight of fresh tea leaves).
Here’s a little breakdown on tea oxidation:
Black tea – Highest oxidation; also, highest caffeine content and strongest flavor; 90% of all tea served in the West is black tea
Oolong tea – 10-70% oxidized
Green tea – Low oxidation
White tea – Minimal oxidation; Uncured, unfermented; Lower caffeine content that other teas
FDA Review
In 2005, the FDA did not approve the health claim for green tea, because the link between green tea and reduced cardiovascular disease risk was too weak and more conclusive evidence was needed.
Recent Research
This past June, 2008, a study was published that links green tea to reduced flow-mediated dilation of brachial arteries (major blood vessels in the upper arms). Flow-mediated dilation is related to coronary endothelial function and is an indicator for cardiovascular disease risk. Increased dilation is good. It means the heart has to do less work to move blood throughout circulation. (The endothelium is the inner layer of an artery, which blood flows against.)
This was a study of 14 healthy individuals that consumed 6 grams of green tea, followed by a measure of flow-mediated dilation. The results showed an increased flow-mediated dilation with tea (peak at 30 minutes post consumption). There was no change to antioxidant status after consumption. It’s proposed that the improved flow-mediated dilation is how green tea reduces cardiovascular disease risk.
The Hype
I came across multiple articles with headlines screaming “Green Tea Protects Against Heart Disease” since this study was published in June. I think there is significant research that still needs to be completed before it can be determined for sure how tea works to prevent heart disease. A study of 14 individuals is a small study.
Drinking 6 grams of green tea, would equal about three – 6 ounce cups of green tea each day. (Based on making 1 six ounce cup of tea with 1 teaspoon or 2.25 grams of green tea.) However, the study results are based on consuming 6 grams of tea in one setting followed by improved flow-mediated dilation at peak levels 30 minutes after consumption. How likely is it for you to drink three cups of tea quickly, back-to-back to reproduce the short-term benefit shown in this study?
To me, that is not a very effective way to reduce heart disease risk. But, I will say that if you like green tea – drink it. Many studies are showing that green tea is beneficial to heart disease. The what, how, and how much is yet to be determined. Who knows what future studies will find?!
To receive regular heart health and weight loss tips for dietitian Lisa Nelson, sign up for The Heart of Health and grab your copy of the special report “Stop Wasting Money – Take Control of Your Health” today!
All the best,
Lisa Nelson RD
Lipoprotein a – How to Lower Lipoprotein a
Lipoprotein(a) levels are not affected by the foods you eat or your activity level. There are no prescription medications, including statin drugs, that have an impact on reducing levels. That doesn’t mean you don’t have options if you live with an elevated lipoprotein(a). Using supplements, such as omega 3’s, niacin, and vitamin C are three options for reducing lipoprotein(a).
Work with your doctor to learn your lipoprotein(a) and the best treatment approach for you.
Testing lipoprotein a
Function of lipoprotein a
Dangers of elevated lipoprotain a
All the best,
Lisa Nelson RD
How to Lower Cholesterol in 8 Simple Steps
Lipoprotein a – What are the dangers of an elevated lipoprotein a?
Elevated lipoprotein a can cause problems. If your vessel walls are damaged, the body produces more lipoprotein(a) to repair vessel walls. Too much lipoprotein(a) concentrates at damage locations along your artery walls, binds with two amino acids resulting in LDL cholesterol being dumped at the “site” and oxidized LDL is deposited in the artery wall which escalates the build-up of plaque. As the plaque forms, lipoprotein(a) encourages the formation of a blood clot on top of the plaque. All of this acts to narrow the blood vessel and impedes blood flow.
One reason for elevated lipoprotein(a) levels is atherosclerosis (hardening of the arteries) and constant arterial wall damage causing the body to produce excess lipoprotein(a) in an attempt to repair the damage. Another reason for high lipoprotein(a) levels is genetics. Even if you do not have signs of heart disease, meaning your blood pressure and cholesterol levels are normal, you may still have elevated lipoprotein(a) due to genetics.
Which is why if you have heart disease (high cholesterol, high blood pressure, etc.) or your have a strong family history of heart disease, it’s in your best interest to get a comprehensive lipid panel. What you don’t know just might hurt you!
As an FYI, for those of you with recurrent angina, bypass grafts closing, or arteries re-narrowing after angioplasty, elevated lipoprotein(a) levels are a possible culprit.
Function of lipoprotein a.
How to lower lipoprotein a.
All the best,
Lisa Nelson RD
How to Lower Cholesterol in 8 Simple Steps
Lipoprotein a – What is the function of lipoprotein a?
Lipoprotein(a) is formed when one LDL molecule is attached to a protein called apolipoprotein(a). (FYI: Lipo = fat; hence the name lipoprotein – fat with protein.) A healthy level of lipoprotein(a) is beneficial and will:
Repair damaged cells
Restore structure of blood vessel walls
Enhance blood clotting
Prevent excessive blood loss due to damaged vessels
Promote cell regeneration
Basically, lipoprotein(a) at healthy levels acts as an “artery patch”.
Dangers of elevated lipoprotein a levels.
All the best,
Lisa Nelson RD
How to Lower Cholesterol in 8 Simple Steps
Cholesterol Lipoprotein a – Do you know your levels?
Lipoprotein(a) is a type of cholesterol we all have; however, it’s not a cholesterol routinely monitored by physicians. Typically you receive a standard lipid panel which gives you the following labs:
Total Cholesterol
LDL Cholesterol
HDL Cholesterol
Triglycerides (and maybe VLDL Cholesterol)
If the above labs are within normal, there is usually no reason a physician would order any further tests. For those of you with a strong family history of heart disease, I encourage you to have your physician do routine tests beyond this standard lipid panel. You need to have a comprehensive lipid panel. A comprehensive lipid panel tests you for the following labs:
Total Cholesterol
LDL Cholesterol
HDL Cholesterol
Triglycerides
C-Reactive Protein (measure of inflammation)
Insulin
Homocysteine
VLDL Cholesterol
Remnant Lipoprotein
Dense LDL III
Dense LDL IV
Buoyant HDL 2b
LDL Phenotype/Size
Lipoprotein(a)
The function of Lipoprotein a.
All the best,
Lisa Nelson RD
How to Lower Cholesterol in 8 Simple Steps
