There are several causes of Low HDL. Here are common reasons for low HDL:
1. Genetic/Inherited Factors
Familial hypoalphalipoproteinemia: Genetic conditions can impair HDL production or function.
Apolipoprotein A1 deficiency: / is a major protein component of HDL; mutations can lower HDL.
2. Lifestyle and Dietary Factors
Poor diet:
High intake of refined carbohydrates and sugars
Trans fats and industrial seed oils (e.g., from processed foods)
Physical inactivity: Sedentary behavior lowers HDL production.
Obesity, especially central/visceral fat accumulation.
3. Substance Use
Smoking: Strongly associated with reduced HDL levels.
Excessive alcohol: While moderate alcohol can increase HDL, heavy use can lower it overall by disrupting liver function.
4. Medical and Metabolic Conditions
Insulin resistance / Type 2 diabetes
Metabolic syndrome
Hypothyroidism: Decreased thyroid function lowers HDL.
Chronic kidney disease or nephrotic syndrome
Liver disease (especially cirrhosis or fatty liver)
Inflammatory states (e.g., chronic infections, autoimmune diseases)
5. Medications
Beta-blockers
Anabolic steroids
Progestins (in some hormonal contraceptives)
Benzodiazepines
Certain antiretrovirals (used in HIV treatment)
6. Functional & Regenerative Considerations
In integrative or regenerative medicine, low HDL might also be explored through:
Oxidative stress and inflammation: Chronic low-grade inflammation impairs HDL function.
Gut microbiome imbalances: Dysbiosis may affect lipid metabolism.
Mitochondrial dysfunction: Impairs metabolic flexibility and lipid handling.
Low HDL cholesterol can be treated by taking medication. I recommend discussing it with your PCP.