Different spices have different qualities, so it’s impossible to generalize over them. If you have liver or kidney issues, you should specifically look up the spices you want to use. But in moderation, the popular spices are ok to consume.
Overall, they usually add very little nutrient as the serving amount is very small, but some of them supposedly have antioxidants. The research is still not solid on antioxidant effects, so I wouldn’t take it too seriously.
Spicy spices such as dried red pepper flakes or powder can have a large amount of capsaicin which can help your throat and sinuses clear up. It’s not fun to go around with stuffy nose or sinuses, so I’d say it’s a good perk of using hot peppers.
Most importantly, they can change the taste of food. If you eat too little or too much, spices can help adjust the taste of the food so you eat more or less. I think this might be the most important health benefit of spices. Also, you could reduce the amount of salt by adding spices such as sumac which naturally has almost no sodium.
I love spices. They can help you become a bit healthier in little ways. But don’t depend on them or overuse them. Use in moderation.
Are Spices Good?
Should We Use Them In Just About Anything?