1 Terracotta tiles are $1-$2.50 a square foot, or $100-$250 for 10x10 feet; European terracotta may cost more.  Natural stone tiles of marble, granite, slate or more start at $2 a square foot, or $200 for 10x10-feet, but costs climb rapidly for custom designs or special orders.
The term probiotic is derived from the Latin preposition âpro,â which means âforâ and the Greek word âbioticâ meaning âbiosâ or âlifeâ. The concept that the gut flora can be modified and harmful microbes replaced with beneficial ones was first introduced in 1907 by a Russian scientist called Elie Metchnikoff.
Prebiotics are substances that encourage the growth of beneficial bacteriaâyou can think of prebiotics as food for probiotics and the healthy bacteria in your system. Whereas probiotics are living microorganisms, prebiotics are non-living.ost prebiotics are carbohydrates that the human body cannot digest but which make excellent food sources for beneficial bacteria. Prebiotics can encourage the growth of beneficial bacteria already living in the body and also aid in the growth and maintenance of probiotics.