As an anecdote,
I was 40+ pounds overweight and had triglyceride levels over 800, LDL cholesterol over 300. My doctor said it would be physically impossible for me to reduce these numbers into safe levels with lifestyle changes alone. I decided to try anyway.
I tried the low-fat route and not only was it rediculously difficult to keep up with I actually gained weight.
I stopped doing that and I said I would eat whatever fatty foods I wanted, excluding fast food, and instead cut out sugar and refined grains after reading similar stuff. Not only was this a lot easier to do, it has immediate benefits. I dropped my triglycerides to 300 and LDL to 190 both within striking range of the effect of exercise able to reduce them to normal. I also lost 25 pounds over the course of a year that I have kept off for more than a year.
I started slowly, I stopped with the 2 biggest offenders. Soda and alcohol. Luckly I can have a good time without having a beer and soda was easily replaced with tea.
Then I did a few other easy things, whole grain breads and pasta replace the refined versions. If you make a good sandwich/sauce you will barely notice. Replace candy with nuts for snacks. GO with whole grain/oat based cereal, if you want better flavor use fresh fruit.
The harder steps were in locating the hidden sugar in the food you buy. Ketchup, lunchmeat, peanut butter, etc. They aren't obvious but you just have to read that pesky ingredient tag. Don't buy anything whatsoever that has high frutcose corn syrup and watch out for hippy sounding alternatives like "dried cane syrup". Don't try to kid yourself that "Earth Power" cookies are any better for you than Oreos.
One that I recently discovered which I never expected was popcorn. It is better to eat a whole bowl of icecream than to go for that favorite movie snack. The only popcorn that is moderately good for you is the kind that doesn't taste good.
Other than that I buy everything else full fat. Milk, yogurt, eggs, meat, etc. It tastes better and seems to satisfy more.
Now if I could only get my ass to the gym on a regular basis...
Not necessarily for the weight issue but exercise DOES in fact improve your lipid profile.
Of course, biblical creationists are committed to belief in God's written Word, the Bible, which forbids bearing false witness; --AIG (lest they forget)