If you're a healthy adult and only your 'good' cholesterol is low—but your 'bad' cholesterol and triglycerides are already low—this might not actually raise your heart disease risk much.

What we've found so far suggests that low HDL cholesterol may not meaningfully increase heart disease risk in healthy adults who already have low LDL cholesterol and triglycerides [1]. Our analysis of the available research shows the evidence leans toward this idea, with 53.0 supporting assertions and no studies or claims refuting it. We looked at what the data tells us about HDL cholesterol—often called "good" cholesterol—and its role in heart health when other key markers are already in a healthy range. In this specific scenario, where both LDL ("bad" cholesterol) and triglycerides are low, low HDL does not appear to carry the same concern it might under other conditions [1]. This doesn’t mean HDL is irrelevant—it plays a role in removing cholesterol from the arteries—but its impact may depend heavily on the overall cholesterol and metabolic picture. Our current analysis is based on a single assertion supported by multiple lines of evidence, but we emphasize that this is a limited pool. We don’t yet have enough data to say how this applies across different ages, lifestyles, or health conditions. Also, we can’t determine from this evidence alone whether raising HDL in such individuals would change outcomes—only that low levels, in this context, don’t seem strongly linked to increased risk. As always, we’re building our understanding over time. What we’ve reviewed so far points toward a more nuanced view of cholesterol, where the relationship between individual markers and health depends on the full picture. Practical takeaway: If your LDL and triglycerides are already low, having low HDL may not be a major red flag—but it’s still worth discussing with your healthcare provider as part of your overall health.