From a BBC.com article by Jessica Brown (April 6, 2020):
“The major findings were that higher intake of spicy foods is related to a lower risk of mortality, particularly deaths due to cancer, heart disease, and respiratory diseases,” says researcher Lu Qi, professor of nutrition at Harvard’s school of public health.
Many researchers believe the health benefits of spices actually come from what we eat them with. For example, there’s a tendency to use them to replace salt, says Lipi Roy. “Spices make food delicious and flavourful, and they can be a healthier alternative to salt,” she says.
Spices have been a part of our diets for thousands of years – it’s second nature to sprinkle our chips with pepper, sip on ginger tea and add chillies to our meals. But recently, some spices have been unofficially promoted from everyday culinary staples to all-healing superfoods.