Do you buy it in capsules? Does it cause heartburn?
Yes, capsules. No heartburn.
https://www.amazon.com/gp/product/B00CJ71JCK/ref=oh_aui_search_detailpage?ie=UTF8&th=1
30 mg is not a high dose of curcumin. 400mg is a common dose in other products.
The lady who reportedly defeated her blood cancer with curcumin (https://www.thesun.co.uk/news/5258742/cancer-patient-67-beats-the-disease-with-the-help-of-turmeric-after-five-years-of-chemo-failed/), takes an exceptionally high dose of 8,000 mg (8 grams) per day.
Curcumin is also a powerful anti-inflamatory, if you have arthritis. It is a powerful anti-oxidant. 1,000 mg (1 gram) per day was shown to be as effective against depression as prozac.