The science behind creatine supplementation is some of the most solid in all of the supplement industry. Creatine monohydrate is what they always use in all the testing and it is the easiest and cheapest to find on the shelves at your local health store. You can purchase a kilo for less than $20 and that’s enough for almost three months worth of taking 5g/day like you’re supposed to. Ideally, you gain the most benefits of taking creatine with strength training, but it does have its other advantages when taken daily even without training intensively. Just take 5g/day, eat well, stay hydrated, and sleep at least 8 hours a day for the maximum benefits. Don’t forget that YMMV depending on your age, training history, muscle to fat ratio, your biological sex, etc. Download the free book online by Brad Pilon called “How Much Creatine” while you’re at it for more science based information. Godspeed.