I purchased the set for my son who suffers from seizures. I have been giving my son vitamins which take some time to go into effect. I was extremely surprised how fast the tincture went into effect, within two days I was able to see change. Which allowed me change the dosage and monitor quickly. The best part is that it is clear to see the exceedingly high quality of the products that Medicine Buddha Labs provide. I will continue to utilize the tinctures as the quality is unmatched to anything on the market.