A dose of 0.3 grams/kilogram of creatine has been taken by mouth daily for six days as a loading dose followed by 0.03 grams/kilogram daily for four weeks. Additionally, 20 grams of creatine has been taken by mouth daily on days 1-4, followed by 10 grams daily on days 5-6, and 5 grams daily on days 7-28.
http://www.mayoclinic.org/drugs-supplements/creatine/dosing/HRB-20059125
For heart attack, 2 grams of creatine has been injected into the blood, followed by 4 grams per hour injected into the blood for two hours. A dose of 4 grams has been injected into the blood, followed by 8 grams injected into the blood over two hours, and 8 grams per 24 hours injected into the blood for five days.
http://www.mayoclinic.org/drugs-supplements/creatine/dosing/HRB-20059125
Research has shown that the most rapid way to increase muscle creatine stores is to follow the loading method, by taking 0.3 grams/kg/day of creatine monohydrate for 5 to 7 days (e.g., 5 grams taken four times per day). Studies show that this rate can increase muscle creatine.
http://www.menshealth.com/fitness/creatine-101
In truth, nobody knows. Although the body makes only 1-2 grams per day, the odds are good that your body can handle an intake of 5 or more grams per day. Anybody over 200 pounds can take 10 grams quite safely provided that they drink sufficient fluids (to avoid cramping).
https://www.bodybuilding.com/fun/dimaggio2.htm
Once muscle creatine stores are saturated, studies indicate that you only need to take 3 to 5 grams of creatine monohydrate per day in order to maintain elevated creatine stores. Most of the creatine is taken up by muscle during the first 2 to 3 days of the loading period.
http://www.menshealth.com/fitness/creatine-101
During the loading phase take no more than 0.3 grams of creatine per each kilogram (2.2 pounds) of body weight. This amount of creatine is rougemy equal to ten-times your daily turnover rate of creatine. Divide your loading dose into four equal parts; take one part every four hours.
http://www.creatinemonohydrate.net/creatine_doses.html
Recommended dosages are as follows: 1  Less than or equal to 140lbs = 5-6grams per day is maintenance. 2  141lbs to 168lbs = 6-7.5 grams per day is maintenance. 3  169lbs to 199lbs = 8 grams per day is maintenance.  200lbs to 242lbs = 8-10 grams per day is 1  maintenance. 242lb+ = 10-12 grams per  day.
https://www.bodybuilding.com/fun/dimaggio2.htm
The maintenance dose. While the recommended maintenance dose (the amount/day you should be taking after the loading phase) is 5 grams/day, studies have shown no gains in strength or muscle mass beyond 3.2 grams of creatine per day. Taking more than that won’t be harmful for you, but it’s certainly harmful for your wallet.
http://www.pwnfitness.com/2013/04/14/optimal-dosage-creatine/
No, this is not necessary. A mere 3 grams of creatine per day for 28 days results in the same muscle content of creatine as that of a six day load program. Thus, if you wanted to get off creatine, it would take about a month to reach normal muscle stores.
https://www.bodybuilding.com/fun/dimaggio2.htm
As far as creatine is concerned, more isn’t necessarily better. The actual amount of creatine monohydrate taken in a single day should never exceed more than ten-times your normal daily turnover of creatine. Creatine turnover is a function of total muscle mass and for an average sized male is rougemy 2 grams per day. Therefore, an average sized male (70 kilograms / 154 pounds) should never take more than 20 grams per day! How to accurately calculate your creatine dose according to these guide lines is discussed next.
http://www.creatinemonohydrate.net/creatine_doses.html
amount of creatine per day
Recommend amount of creatine is 0.3 grams/kilogram per day. The amount of creatine should be 0.3 grams per kilogram.