The article seems to mention that the only effect seems to be placebo.
Don’t forget, people were and still are taking horse dewormer for Covid, despite shitting out parasites not really fixing much other than a parasite problem.
If you mainline a half gallon of junkie blood, you should get a decent buzz. Just remember to check their blood type first, and to bring a large rug so you can dispose of their desiccated body afterwards.