Myocarditis Symptoms: Chest Pain, Shortness of Breath, and When to Worry
Myocarditis is inflammation and injury of the heart muscle. It can cause chest pain, shortness of breath, unusual fatigue, palpitations, fainting, or signs of...
Nattokinase for Heart Health: Benefits, Risks, and Medication Interactions
Nattokinase is a fibrinolytic enzyme produced when soybeans are fermented to make the Japanese food natto. Supplements are promoted for blood pressure, circulation, cholesterol,...
Nattokinase Safety: Blood Thinners, Bleeding Risk, and Who Should Avoid It
Nattokinase is an enzyme made during the fermentation of soybeans into natto. It is sold as a dietary supplement for circulation, blood pressure, and...
Nature Exposure and Blood Pressure: Can Time Outside Lower Stress and BP?
Spending time in parks, forests, gardens, or other green spaces may help lower stress and support healthier blood pressure, but the effect is usually...
Niacin Flush vs No-Flush Niacin: What Works, What Doesn’t, and Risks
“Niacin” can mean several different compounds, and that difference matters when a label promises cholesterol benefits without a flush. Nicotinic acid is the form...
Niacin for Cholesterol: Does It Still Help and Who Should Avoid It
Niacin can change cholesterol numbers, but it is no longer a routine first-line treatment for high cholesterol. At prescription-level doses, nicotinic acid can lower...
Nicotine and Blood Pressure: Why It Raises Numbers and How Long It Lasts
Nicotine can raise blood pressure within minutes because it activates the body’s “fight-or-flight” system. That response releases stress hormones, tightens some blood vessels, speeds...
Nicotine Pouches and Heart Health: What We Know About Risks
Nicotine pouches avoid smoke and tobacco leaf, but they are not harmless to the heart. Their main cardiovascular concern is nicotine itself: it can...
Nitric Oxide Supplements: L-Citrulline, Beets, and What’s Worth It
“Nitric oxide booster” is a broad marketing label, not one specific supplement. The best-supported options work by giving your body raw materials it can...
Non-HDL Cholesterol: What It Is and Why It Matters
Non-HDL cholesterol is the cholesterol carried in all potentially artery-clogging lipoproteins, not just LDL. You calculate it by subtracting HDL cholesterol from total cholesterol....
Nuts for Heart Health: Best Types, Portions, and Common Mistakes
Nuts are one of the simplest foods to add for heart health because they replace less helpful snacks while providing unsaturated fats, fiber, plant...
Oat Beta-Glucan for LDL: How Much Works and Which Oat Products Count
Oat beta-glucan is one of the few food fibers with a well-established cholesterol-lowering dose. About 3 g per day of oat beta-glucan is the...
Oats for Cholesterol: How Much Helps and the Best Way to Eat Them
Oats can lower LDL cholesterol, but the benefit comes from eating enough of the right part of the grain consistently. The key component is...
Omega-3 for Heart Health: EPA vs DHA and Who Benefits Most
Omega-3 fats support cardiovascular health, but “omega-3” is not one treatment. EPA and DHA are the main long-chain omega-3 fats in fish and marine...
Omega-3 Prescription vs OTC Fish Oil: EPA/DHA Doses That Lower Triglycerides
Prescription omega-3 medicines and fish oil supplements can both contain EPA and DHA, but they are not interchangeable when the goal is to treat...
Omega-3 vs Fish Oil: Which Supplements Help Triglycerides Most?
If your goal is to lower triglycerides, “omega-3” and “fish oil” are not the same thing. Omega-3 is a family of fatty acids that...