Most adults already get enough calcium through diet, especially if they eat dairy or fortified foods. The danger often lies in high-dose supplements.
You can protect your legs by balancing calcium with magnesium-rich foods like spinach, pumpkin seeds, or avocados.
5. Niacin (Vitamin B3) – The Flushing Trap
Niacin is often promoted for heart and cholesterol health. But in high doses, it causes a temporary flushing reaction—warm, red skin due to dilated blood vessels. Sounds like good circulation, right? Not quite.
Frequent high doses can cause rebound constriction, where your vessels tighten again, sometimes even worse than before. It’s like pressing the gas pedal too hard—eventually, the engine stalls.
Stick to dietary sources such as fish, poultry, and whole grains, or use niacin supplements only under professional guidance.
4. Vitamin K – Helpful, Until It’s Not
Vitamin K plays a critical role in blood clotting and vascular health. But if you’re on anticoagulant medication (like warfarin), too much vitamin K can interfere with the drug’s effectiveness—raising your risk of clots that can block blood flow in your legs.
