Instant coffee as soluble a useful is..and harmful is..

As a time economy, as fast and simple, and long time keeping.
As very light kind of coffee using, that lows his expences for ten times, as sometimes using remains of high kind coffee, and over fried beans, which are not put in recycle.

As in over manufacturing adding substances, stabilizers, taste supplements and very harmful for organism, as very bad for peoples with heart , stomach, liver diseases.
And result as two cups of natural, good coffee/day will not harmful you, and including in pregnancy, as do not cook a very strong drink, and drink on a first half day.