Clove
The Essentials

You'll notice clove's intensity straight away. Its main compound, eugenol, numbs pain on the surface of the gum. This is the best-supported use.
Read the whole guide on one page →It's one of the strongest antioxidant spices, gram for gram, though nobody eats it by the gram.
Clove oil is very strong. Never swallow it, and never give it to a small child.
Clove is a dried flower bud with a very big flavour. A single bud can change a whole pot of rice. In Persian kitchens it goes into advieh spice blends, into rice, into stews, and into winter tea. In Persian homes it has another job too: a clove held against a sore tooth quiets the pain. That old habit turned out to have a real reason behind it. Clove oil contains eugenol, which numbs the surface of the gum. Dentists have used it for more than a hundred years.
Known to botanists as Syzygium aromaticum.