~14- The Rongelapese food appears to have large variation in the zinc content The and on the average is less than 8 mg daily. higher levels of cobalt-60 and zinc-65 are associated with each other and with those rations which contained local fish. This is to be expected since these iso- topes are primarily found in marine organisms (Dunning, 1957). The higher levels of strontium-90 and cesium-137 are found where local fruit was consumed. In general, higher levels of strontium-90 are coincident with higher levels of cesium-137. Coconut contributes little strontium-90 and pandanus the most. Those rations with the higher levels of zinc-~65 also contain the higher levels of stable zinc, indicating that local sea foods may be the main source of zinc in the diet. Cesium-137, strontium-90, relation with potassium, and cobalt-60 show no definite corcalcium and cobalt respectively, indicating that these elements are in large measure supplied from imported foods. With the current means of sanitation, utilization of pit toilets and burial of garbage on Rongelap and Eniaetok Islets there must be a net copra, addition of minerals. The chief export, is low in ash content as compared with the imported foods. A quantitative evaluation of the addition would require comparison of export and import records.