Since it is not considered an essential nutrient because body can manufacture it, there is no rda for collagen. However it is very known that a dose ranging 5 to 10 grams daily of Hydrolyzed Collagen along 1 to 3 grams daily of vitamin C can dramatically improve some premature aging symptoms (mainly seen on skin, hair and nails), joint-bone disorders (like arthrosis, rheumatoid Arthritis and osteoporosis) and also can accelerate the wound healing.
Hope this helps!
Roberto Carolini
Nutritionist
It is "Recommended Daily Allowance"
Really....
Depending on the age of the boy, you can estimate a daily recommended allowance for calories to be in between 1500 to 2000 (with the later being the allowance for an Adult Male).
15 milligrams
32 oz.
Between 5,000 and 6,000mg per day is recommended.
The recommended daily caloric allowance for an adult female is 2,200 calories. For a male, the allowance is 2,700 calories. The actual amount of calories needed depends on age and level of activity.
DRI-daily recommended intake RDA- recommended daily allowance
The answer is 1500-2000 calories
European Community Recommended Daily Allowance
Recommended Daily Allowance
18 milligrams