that widens blood vessels and lets circulation move with less resistance. When the legs are starved of flow, they complain first: tingling, coldness, a dragging sensation, that weird “not fully awake” feeling in the feet.
Now picture a crowded tunnel during rush hour. One lane is barely moving, horns are blaring, and everything backs up. Niacin is the moment the tunnel expands and traffic finally breathes again.
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That widening matters even more far from the heart, where blood has the hardest job reaching the
