Yes it is a real fruit! The miracle berry is a small red fruit native to West Africa. It has been used throughout the years to sweeten foods and enhance flavors.
Native to West Africa, the miracle berry fruit contains a protein called miraculin. When the berry or it's protein is eaten, miraculin binds to the sweet taste receptors on the tongue. Once anything sour touches a miraculin-coated tongue, the protein reacts to the sourness by activating the tongue's sweet taste receptors which then send a signal to your brain that the sourness you just ate is actually sweet! Since miraculin is a protein, it's fully digested by your body instead of sticking around in your gut like chemical sweeteners or spiking insulin levels like sugar. Bye bye sugar high, hello healthy sweetness!
The natural sweetness of the miracle berry fruit comes from a protein in the berry called Miraculin, and it comes directly from nature! Miraculin is thousands of times stronger than sugar so we only need a little to get that familiar sweet flavor. Since the proteins are fully digested by your body, they don't stick around in your gut like chemical sweeteners or spike insulin levels like sugar.