But according to Dr David Sinclair, a Harvard-based expert in ageing and genetics who’s known for his research into longevity ...

Dr David Sinclair, a professor of genetics at Harvard Medical School, says the rate at which your nails grow is a good ...

According to Dr. David Sinclair, a professor of genetics at Harvard Medical School, your nails are actually a clear sign of ...

But longevity Dr David Sinclair says he pays closer attention to his nails when it comes to knowing how quickly he is aging, ...