Yes, turmeric is a natural food that can be consumed on a daily bases. It's use as a food and has been dated back as far as 4000 years. There are however some people on medication that should not consume high doses of turmeric as it may interact with their medication.
Pregnant and nursing mothers are advised not to supplement turmeric and anyone taking medication or who has an existing medical condition should consult their GP before using turmeric. Anyone scheduled for surgery must avoid turmeric supplements for 2 weeks before as it is a natural blood thinner.