The protein need changes in two separate directions with age. The amount recommended per kilogram is highest in childhood and falls towards adulthood; against this, the daily total in grams goes on rising as body weight grows. The protein table of Türkiye Beslenme Rehberi (TÜBER), Türkiye's national dietary guideline, gives these two curves side by side.
Why is it higher in childhood?
In the guideline's table the amount recommended for a boy of two is 0.97 grams per kilogram. At four this value falls to 0.86 grams, at six it rises to 0.89 grams, and at ten it stands at 0.91 grams. In adulthood, that is after 18, the number settles at 0.83 grams.
On the total gram side the curve is the reverse. In the same table 11.8 grams a day is given for a boy of two, 28.4 grams at ten and 55.7 grams at seventeen. So while the amount per kilogram falls, the growing body weight carries the total upwards.
The share in energy changes too
The guideline gives a range by age for protein's contribution to energy as well. In the two-three age group the reference intake range is 5-20 percent of energy. From four years of age up to 64 the range is written as 10-20 percent.
After 65 the lower limit rises: the range becomes 12-20 percent. So at older age protein asks for a larger share within the same energy. This change is written in the same way for both men and women. In the women's table the same curve repeats with their own weights: at two 0.97 g/kg and 11.2 grams, at ten 0.91 g/kg and 29.0 grams, at 19-29 0.83 g/kg and 49.8 grams.
What changes at older age?
The guideline states that older people should take in enough protein at every meal in order to make muscle synthesis as good as it can be. The egg is brought forward in this section in particular: compared with other animal protein sources it is cheaper, easy to digest, and contains a high amount of leucine, an amino acid that matters for muscle synthesis.
The same section counts what the egg carries alongside as well: essential fatty acids, choline, vitamin A, vitamin B12 and selenium. Encouraging egg consumption in older people helps protect muscle strength and function.
Why are the women's and men's tables separate?
The values per kilogram are largely the same in the two sexes, but because the median body weights are different the total in grams parts ways. In the 19-29 age group the median weight used in men is 71.9 kilograms and its equivalent is 59.7 grams a day; in women it is 60.0 kilograms and its equivalent is 49.8 grams.
The guideline also notes that the lower limit of protein's contribution to energy is higher in women than in men and lower in children than in adults, and that it rises as age advances. As the physical activity level rises this lower limit falls. The upper limit of the table comes from measurement: across Türkiye the 97.5 percentile value of the protein-energy ratio was found to be 20.7 percent.
Where does it turn into a mistake?
The first mistake is measuring a child's protein need with an adult's gram figure; the table works per kilogram and is multiplied by the child's weight. The second mistake is reading the rise in protein's share at older age as though total energy had to rise as well; what changes is the share itself. The third mistake is taking the median weights in the table for target weights; they are measured values used so that the calculation can be made, not a personal target.
How does protein quality affect the calculation?
In the guideline's protein table there are two separate columns for every age. The first is calculated with a pattern whose protein quality score is 100; the second is corrected according to 83, the measured quality score of the average diet in Türkiye.
The difference shows at every age. While for a boy of two the first column says 0.97 g/kg and 11.8 grams, the second column says 1.21 g/kg and 14.8 grams. In adulthood the first column is 0.83 g/kg and the second is 1.04 g/kg. The second column is not a higher target; it is the cost of meeting the same target with a low quality pattern.
The guideline also notes that the body weights used for children and adolescents are taken from the 50 percentile values of international growth standards, and for adults from the measured median weights of the country-wide nutrition survey.
The child and adolescent rows in the table are a reference scale; the plan of a child in the growth period is not built with a table. This content has been prepared to support general nutrition literacy; it does not take the place of medical diagnosis or treatment and does not carry the character of personal nutrition advice. A personalized plan is prepared only by a qualified dietitian; if there is pregnancy, chronic illness, regular medication use, child nutrition or a clinical condition, supervision by a doctor and a dietitian is required before starting a plan.