A hydration monitoring apparatus is disclosed. The hydration monitoring apparatus comprises at least one sensor and an analysis unit. The hydration monitoring apparatus may take at least one biometric, biological, and/or physiological measurement of an individual and measures the hydration level, dehydration level or status, or bodily fluid level of an individual. The hydration monitoring apparatus indicates the hydration level, dehydration level or status, or bodily fluid level of an individual based on one or more biometric, biological, and/or physiological measurements. In one embodiment of the invention, the hydration monitoring apparatus determines whether to inform the user of their hydration level, dehydration level or status, or bodily fluid level. In one embodiment the hydration monitoring apparatus further comprises an informing device that informs the individual that the individual is approaching dehydration.
