There's nothing scientific. A friend hadn't ever dreamed in color before taking LSD, but after taking it and going to sleep later that night, they had a vivid

There's nothing scientific. A friend hadn't ever dreamed in color before taking LSD, but after taking it and going to sleep later that night, they had a vivid dream in color. Since then, every dream they remember having has always been in color. They were very surprised and very certain. That was some pretty convincing anecdotal evidence that LSD can cause permanent changes in certain susceptible people. It was an improvement in their case, but that seems like luck.