Studies were made on 309 volunteers (156 males and 153 females) ranging from the age of 14 to 69. Their height, weight, chest thickness and skinfold thicknesses were measured anthropometrically. Total body potassium was estimated with a whole body gamma counter by counting gamma-rays from the naturally occurring radioisotopes of potassium-40. In the assessment of total body potassium content, it is necessary to make corrections for (1) chest thickness, (2) fat thickness of backside and (3) body width. The total error in estimating total body potassium content is within 2.5% in counting for 10 minutes with a whole body counter. Potassium content and concentration were compared with body indices, such as Bouchard's index, the body mass index, Rohrer's index, Broca's index and Minowa's index. Potassium content and concentration showed the sex difference and age trends. Potassium content in male was from 114.9 (g) to 217.6 (g) and that in female was from 80.0 (g) to 150.0 (g). Potassium content and concentration n male were higher than those in female. Both sexes showed a continuous decrease of potassium concentration with physiological aging. The correlation between potassium concentration and other body indices was high. The results demonstrated that potassium concentration was a useful index for assessing the degree of obesity. Total body potassium content can also be used in assessing the amount of lean tissue (fat free mass) of the body. The precision of the estimation of the lean body mass is of interest from the viewpoint of health control. The precision of the estimation of the lean body mass can be improved considerably by predicting the value of potassium concentration in unit lean body mass.
According to the market basket studies proposed by the Ministry of Health and Welfare, the given kinds of foodstuffs were purchased on October, 1984, from the selected foodshops at the nine points of Sapporo, Sendai, Tokyo, Kofu, Nagano, Osaka, Wakayama, Matsue, and Kitakyusyu and the foodstuffs collected were classified into eight groups. Each group was analyzed with reference to the 20 kinds of food additives. Each analytical value in the present work was represented as the sum of the amount of the components added to the foodstuffs artificially and the components included in the foodstuffs naturally as elements. The intake of each foodadditive per capita per day was follows; 0.074mg of retinol, 0.36mg of thiamine, 0.43mg of riboflavin, 16.5mg of ascorbic acid, 1.48mg of nicotinic acid, 0.65mg of nicotinamide, 2.82mg of pantothenate, 14.98mg of total tocopherol, 166.6mg of threonine, 344.1mg of alanine, 230.9mg of valine, 80.6mg of methionine, 187.6mg of isoleusine, 247.8mg of phenylalanine, 260.3mg of lysine, 145.5mg of histidine, 285.1mg of arginine, 5.69 mg of iron, 147.0mg of magnesium and 3.41mg of alminium.