Known problem with any health trackers such as a smart clock: they do not fit tight enough, plus you have to rely on the battery (usually not very large) and the wireless connection. Even special labels with sensors do not provide long-term use. However, if you need to testify such sensors, then Harvard and MIT scientists have an excellent development for you.
They managed to invent smart tattoos. With their help, all the necessary sensors are placed under the skin and do not require recharging or wireless connection. The special ink that makes up the tattoo react with the blood and thanks to this reaction you can accurately determine what happens to your health. Green ink, for example, becomes more noticeable with dehydration, which is very important for athletes. Another kind of green ink turns brown if the diabetic is going up the glucose level.
Unlike conventional smart tattoos, these medical inks will not stay on your skin forever. According to scientists, with proper funding, they will be able to create tattoos that will stick to the skin only a programmed period of time. Also, the tattoo can be made visible only in a certain light (ultraviolet, for example), if you do not want to explain to friends or colleagues that it's on your hand.
If you are not sure what it means to change the color of the tattoo, then decryption will be available via the application on your smartphone.
Most likely, it will be a long time before the medical smart tattoos become as beautiful as usual. Perhaps in the future, any tattoo artist will be able to use such ink under the guidance of a doctor, but so far these are only very distant prospects. In addition, this development gives an occasion to reflect on ethical issues. For example, if a person is comfortable if everyone sees the sugar level in his blood, should he wear a tank top?
If you do not think about these issues, then the benefits of such smart tattoos are obvious. In addition to accuracy, they also provide convenience. The application of sensors to the skin is much more comfortable in everyday life, rather than a special tracker on the hand.
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