niacin can be a double edge sword on raising one's HDL, for those that take Niacin are you monitoring your Homocysteine level?
Homocysteine Risks Include Stroke, Heart Disease and Other Health Concerns - VRP.com
Niacin: Another cause of elevated homocysteine is high dose nicotinic acid (Vitamin B3). This is especially surprising given the proven track record for niacin’s ability to dramatically improve lipid profiles. Niacin is one of the most economical and effective ways to lower total cholesterol, triglycerides, and lipoprotein (a) [lp(a)], and to raise HDL (the “good” cholesterol). However, doses of niacin in excess of 1,000 mg have been shown to cause an increase in homocysteine. (15) This increase may be offset by the benefits of niacin, and may be mitigated by the use of homocysteine-lowering substances described below.
Consider using Folic Acid,B6 and B12 enriched foods and supplements, I would also include , Serrano, Habanero and Jalapeno peppers too your daily diet.