Health literacy is the ability to find, understand, and actually use health information, whether that means reading a set of test results, following instructions for a new medication, or knowing when a symptom is worth a visit and when it is not. It is a practical skill, not general intelligence.
Low health literacy is not a personal failing so much as a systemic gap: medical language is dense by habit, results are often reported in numbers without context, and few people are ever taught how to interpret either. Improving literacy is as much about clearer communication from providers as it is about patient effort.
The payoff of closing that gap is significant: people with stronger health literacy tend to manage chronic conditions more effectively, catch problems earlier, and make more confident decisions about their own care, simply because they understand what the information in front of them is actually telling them.