Dana's Low-Carb for Life (Podcast)
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A reader who goes by healthgal asks: Dana, some, such as myself, have higher cholesterol numbers due to the high sat fat content of some recipes. I would love to see some recipes that are lower in sat fat and higher in good fats.
Health Gal, the problem is that for many, perhaps most, of us saturated fats are the good fats; I deliberately favor them because I think they're the natural fuel of human kind, and because, unlike vegetable oils, they are not inflammatory.
That said, everyone is different, and I'll keep this in mind.
In the meanwhile, a few thoughts:
1) Be aware that elevated total cholesterol has never been demonstrated to be a risk factor for heart disease in women of child bearing age, nor in women over 65. Please, take a deep breath, and point this out to your doctor.
2) If, as is the case with so many low carbers, your triglycerides are on the floor -- I've seen mine as low as 36 -- be aware that this will artificially skew your LDL number higher. Why? Because LDL is rarely measured directly, but rather is calculated using something called the Friedewald Equation. The equation goes like this: LDL = TC - (HDL + T/5). In English, that says "LDL cholesterol equals total cholesterol minus HDL plus one-fifth of your triglycerides." Apparently this equation is fairly accurate if your triglycerides are between 100-200.
But when your triglycerides drop really, really low -- a good thing -- that one-fifth of triglycerides drops, too, and there's far less to subtract from the total cholesterol number, skewing the LDL higher. Doctors know this, but seldom think of it when looking at LDL numbers that are running above what they've been trained to look for. My LDL was just a touch "high" at one point; I pointed out my super-low trigs to my doctor and said, "I could lower my LDL by raising my triglycerides." She laughed and said "Bad idea." Yet when my next blood work was done, she commented favorably on my LDL having dropped into the "normal" range -- until I pointed out that, sure enough, my trigs had gone up all the way into the 70s.
Just keep the Friedewald equation in mind, okay?
3) LDL turns out to come in more than one sort. There's small, dense LDL, which is predictive of heart disease, and big, fluffy LDL, which is not. Low carb diets tend to skew LDL toward the big, fluffy, harmless LDL. Consider having your doctor test for which type of LDL is predominant in your blood.
Having said all this, you may be a saturated fat responder, just as some people can't eat dairy, or shellfish, or whatever. I'll do some more recipes with olive oil, okay?
Cholesterol and diet.
Dana,
Thanks so much for this wonderful information. I really appreciate it. I will keep the Friedwald equation mind. My HDL is quite high (86) even without alot of exercise. My triglicerides are are 92, I would like to see that come down. My total number is 244. My doctor isn't really concerned about that because of my high HDL. Hmmmm, is she correct about this? Recently I found out via a food sensitivity test that I am VERY sensitive to dairy in any form. I have pretty much stopped it accept when I cheat a bit.
I'll look forward to your recipes with olive oil which is what I use and cook with. Being from a mediterranean backgound this seems very natural to me.
Thanks again for the info.
More on saturated fat
Hi Dana,
Here's a nice interview that summarizes the benefits of a diet high in saturated fat from a post in today's Hyperlipid blog:
http://high-fat-nutrition.blogspot.com/2009/08/shazia-and-dr-clifton.html
A great parody skewering a low-fat true believer!
The skinny on fat?
Dana, coming from Atkins world: I've seen much written on protein's benefits, but even the Great Doc said relatively little about fats and seemed to hedge his bets on the supposed risks of saturated fats at times. Could you give us a post with your latest thinking on sat fats? Are they not only not as bad as previously trumpeted, but perhaps even better than unsat veg oils? This is new frontier territory for me and maybe for others (despite my screen name!)
Thanks! (Off to get some water...)
thank you for this
I'm getting ready to engage in my annual battle with my health care provider over my cholesterol numbers. At least last year, I got her to concede that my LDL may be high because I'm a low carber. I've eaten absolutely no sugar for 19 months, and no wheat for over 6 months, so my triglycerides should be super low (last year in the 50s). I knew about the fluffy particles, but only recently became aware of the Friedewald equation. I recently found out that high cholesterol runs in the family as well.
I mostly just ignore her, and like you, will find another provider if she insists on statin drugs...but it will be nice this year to be armed with even more information.
You've mentioned Mark's Daily
You've mentioned Mark's Daily Apple before and this is another great time to mention it. His writings on saturated fat, good fats, and reading cholesterol testing results are phenomenal.
Here is the formula for LDL
Here is the formula for LDL when your triglycerides are lower than 100
LDL = TC/1.19 + TG/1.9 - HDL/1.1 - 38
http://www.ams.ac.ir/AIM/NEWPUB/08/11/3/0014.pdf
My LDL by the Friedwald formula (on my lab report) is 56
By this new formula it is 35.4
LDL formula
Wow! Thanks, nonegiven - using the mmol version of that formula
LDL (mmol/L) = TC/1.19 + TG/0.81 – HDL/1.1 – 0.98
my LDL went from a slightly doctor-concerning 2.5 mmol to a comfortable 1.94.
Nicky.