Hm, I really don't think that eating less saturated fat should give you a higher LDL-P.(?) At least that's not how I understand the interaction between the consumption of saturated fats and the expression of LDL-receptors in the liver. Maybe I have to change my mind about that.
Reducing saturated fat, or increasing unsaturated, generally leads to increased LDL receptor activity and reduced LDL-C. This seemed to be the case for me, however minor the changes were. It's hard to find information about how this directly effects LDL-P, and I don't know how much of a role this had in the context of my diet. I'm mostly speculating, albeit in an educated fashion.
Isn't the change in mean LDL particle size the sole culprit for the fall in LDL-C? I think your lab results are a rather benign but good example for the frequent discordance between LDL-P and LDL-C.
More carbs indeed may play a role and explain the reduced LDL particle size, but I'm really somewhat surprised the LDL-P did rise, given your weight reduction, too.
My LDL-C dropped while I had an increase in total and small LDL-P. This means less total and LDL cholesterol but more smaller particles. Though the changes were minimal and possibly testing variability, it would otherwise be textbook LDL-C/LDL-P discordance as you said. I'd say the relationship between LDL-P, LDL-C, and particle size can't be separated such that you can predict one value without knowing the other two, so I'm not sure you can say that the change in LDL particle size is responsible for the fall in LDL-C. Here's a sort of chart of what I'm trying to say:
[LDL-P] [LDL-C] [LDL particle size][no change] [increase] [increase]
[no change] [decrease] [decrease]
[increase] [increase] [decrease]
[decrease] [decrease] [increase]
I agree about carbs and calories. I do eat 4-8 tortillas on most days, and a lot of fruit (mostly bananas, calorically).
Did you already decide if you will change anything soon? And if yes, what will it be? This is still the most inspiring thread on this forum for me by far, so I'm eager to know what are your conclusions and plans for the future.
If I interpret the results correctly you should feel a little more relaxed know about a somewhat more liberal use of saturated and monounsaturated vegetable fats and oils? Does that matter to you anyway in the way you enjoy food?
Someone in the newer
ApoE4 forum posted about a
$75 NMR Lipoprofile test through LabCorp without a doctor's order. With this I'll probably test a few changes, and possibly just retest for validity. My total intake of sugar is fairly high at ~ 100 g/d. This comes from fruit, sweet potatoes, and vegetables (especially things like tomato paste). I'm seriously considering cutting back on my fruit consumption in place of more starches, and possibly bumping my fat back up to 30%. 22% fat is quite palatable to me, but 30% is nice sometimes as it helps the food seem more rich, and especially since higher fat intake seems to help reduce my appetite. The appetite is only a problem under 15-20% fat, and seems to be maxed out at 30-35% fat.
I don't consciously try to eat lower saturated fat, I just chose not to restock my coconut oil and chocolate seemed to be giving me headaches. While it was neat for this experiment for it to be lower, I don't otherwise worry about their intake. I think I posted some research earlier in this thread about how the effects on lipids and atherosclerosis seem to be in the order of dietary cholesterol > saturated fat > total fat.