The first group of participants will receive the lowest dose level. Each new group will usually receive a higher dose than the group before it, if no intolerable side effects were seen. Each group will have 3-6 participants. This will continue until the highest tolerable dose of curcumin is found. Up to 6 dose levels of curcumin will be tested. Once the highest tolerable dose of each arm is found, up to 14 extra participants will be enrolled for extra safety testing.