A processor for determining health of an individual, the processor comprising at least one microprocessor and a memory, the memory comprising instructions executable by the at least one microprocessor such that the processor is operable to execute the steps of: receiving a plurality of values for a plurality of characteristics associated with the individual; determining the individual's normal range for each of the plurality of characteristics; combining the plurality of values into a multiple-input composite index; determining if change information indicative of a change in the composite index satisfies a predetermined change condition; wherein the predetermined change condition when satisfied is indicative of the movement of the individual's well-being towards dysfunction within their individual normal range; wherein the normal range of the characteristic information for the individual is learned by the processor by collation and mapping of the characteristic information of the individual over a time frame dependent upon applied respective testing protocols and frequency; wherein the plurality of characteristics include at least two of heart rate, heart rate variability, a respiratory indicator, respiration rate, respiratory rate variability, blood pressure, skin conductivity, temperature, blood oxygen saturation levels, weight, body mass, metabolic indicators, skin colour, a physical movement characteristic, a brain activity characteristic, a heart activity characteristic, a vagal tone characteristic, and a HPA axis stimulation characteristic, a blood characteristic, a urine characteristic, a faeces characteristic, a hair characteristic, a skin characteristic, a genetic characteristic, an epigenetic characteristic, sleep cycle characteristic, and a bone density characteristic. receiving a plurality of values for a plurality of characteristics associated with the individual; determining the individual's normal range for each of the plurality of characteristics; combining the plurality of values into a multiple-input composite index; determining if change information indicative of a change in the composite index satisfies a predetermined change condition; wherein the predetermined change condition when satisfied is indicative of the movement of the individual's well-being towards dysfunction within their individual normal range; wherein the normal range of the characteristic information for the individual is learned by the processor by collation and mapping of the characteristic information of the individual over a time frame dependent upon applied respective testing protocols and frequency; wherein the plurality of characteristics include at least two of heart rate, heart rate variability, a respiratory indicator, respiration rate, respiratory rate variability, blood pressure, skin conductivity, temperature, blood oxygen saturation levels, weight, body mass, metabolic indicators, skin colour, a physical movement characteristic, a brain activity characteristic, a heart activity characteristic, a vagal tone characteristic, and a HPA axis stimulation characteristic, a blood characteristic, a urine characteristic, a faeces characteristic, a hair characteristic, a skin characteristic, a genetic characteristic, an epigenetic characteristic, sleep cycle characteristic, and a bone density characteristic.