I use the Wal Mart brand, and it has worked. I let it melt in his soup, use it in cereal, fry with it, and will try the smoothie. My husband has Parkinson w/dementia, mask like face. After the first day he woke up, smiled ( unusual) raised his eyebrows, Really unusual , and talked in a normal voice. I'm trying to get the right dosage. But for him, a remarkable improvement! He even said he wanted to start going places with me, and he felt better.