Stevie- as far as "natural methods", are some of the things below you recommend and/or have researched? Care to spill the beans on any others?
Astralagus
Ginger
Curcumin
Resveratrol
Oregano
Cinnamon
Sulforaphane
This would be a good start on activators of PPAR-a.
https://selfhacked.com/blog/about-p...ys-to-activate-it/#How_to_Increase_PPAR_Alpha
We, a lot of times seek quantity over quality. There's reasons to believe that not all HDL act as anti-inflammatory and antiapoptotic reactants. In fact it's been demonstrated to act dysfunctional, exerting
proatherosclerotic properties in certain environments such as; hyperglycemia, glycation <--those nasty little advanced glycation end-products, elevated estradiol levels could potentially increase copper levels, thus impose negative consequences on HDL function. As could progestins. I've mentioned this a few years ago.
Oh, let's not forget the detrimental effects of systematic inflammation on HDL function. That's a big culprit for dysfunctional HDL. Uncontrolled sleep apnea..?
Ideally when hyperfixating on a specific, like that of HDL. Focus on increasing the capacity of reverse cholesterol transport, and look towards the quality (function) rather than the unit of itself (quantity).
Fermented foods seem to hold promise on all the topics I had mentioned, according to some literature I've consumed. Olive oil has it's place in the functionality of HDL.
Just don't get that oxidized oily stuff
Low dose ASA (aspirin) has been demonstrated to increase cholesterol efflux.
On the other hand, there's some suggestions that the slide-of-hand brings to light about Tamoxifen's negative effects on reverse cholesterol transport. (María Eugenia Fernández-Suárez; et al, Sept 2016). Yet we've perplexed it as okie dokie for increasing HDL. That's yet to be fully understood, I brought it to light on some recent research.
So much to learn, so little time.