While the benefits of taking creatine monohydrate are hard to rebute, there is some confusion of how much to exactly take. There is a common knowledge of the amount of creatine to take when supplementing, but today you’ll see that this isn’t necessarily the only way.
If you look at the label of most creatine monohydrate supplements, a large majority of companies suggest a loading phase of 20 grams for 5 days with 5-10 grams a day following after that. While this is a typical way to use creative monohydrate, some have found no benefit to loading. Some have found great results from taking only 5 grams of it after a workout and have seen fantastic results after only a couple of weeks.
It takes two weeks for the levels of your body’s creatine levels to get back to normal after supplementing.

Is creatine safe to use while do cardio exercises such as cycling, running etc?
Yes, absolutely. But you will not get as much benefit from supplementing with creatine for endurance sports as you would for strength sports. For example, a sprinter would benefit more from creatine than a marathon runner would.