Alternative recommendations on intakes Some independent researchers have calculated the amount needed for an adult human to achieve similar blood serum levels as vitamin C synthesising mammals as follows : NUMBER@1 milligrams per day : the ORGANIZATION@1 .

Some researchers have calculated the amount needed for an adult human to achieve similar blood serum levels as Vitamin C synthesising mammals as follows : NUMBER@2 mg per day - ORGANIZATION@1 and ORGANIZATION@2 -LRB- ORGANIZATION@3 -RRB- Recommendation .
