Wasabi is so expensive that the kind you eat with your sushi probably has up to 5% of the real thing
- The wasabi you're used to eating is probably just horseradish, sweetener, and food coloring.
- Fresh wasabi is rare to come across and costs around R3,400 per kilogram.
- Business Insider visited the first wasabi farm in Europe to find out why this vegetable costs so much.
Wasabi is a small green plant in the brassica family, related to many cheap and easy to find plants like horseradish, cabbage, or broccoli. But unlike these it's incredibly expensive. A kilogram of fresh wasabi can cost you 25 times as much as fresh horseradish.
Because of its price the 'wasabi' you're used to is probably just a mixture of horseradish, colouring, and sweetener. These products often only have 1% to 5% of the real thing in.
Wasabi is known for being the hardest plant to grow commercially in the world. It can be found naturally growing alongside Japanese mountain streams has a strict set of conditions it needs to thrive.
Wasabi needs a constant supply of running spring water; it likes a shady area and rocky soil or gravel; and can only tolerate a temperature of around 8 to 20 degrees centigrade all year round. Too much humidity, or the wrong minerals can also cause problems for the plant and on top of all that it's susceptible to pests and disease.
There's one other reason you probably don't see real wasabi products in your local supermarket or restaurant. Wasabi's spice comes from a chemical reaction that occurs when you break down the cells, but this reaction is short lived. After 5 minutes the spicy flavour peaks but leave it for 30 minutes and almost all the flavour is gone.
All of these factors mean fake wasabi isn't going away any time soon.
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