The Henredon Grand Provenance Collection was discontinued quite a few years ago. This line of furniture was extremely expensive and very high end furniture.  A very ornate line of dining furniture with marble accents and detailed carvings.  We have sold a few of these tables in the past, and recently have obatined one with s amall area of damage.  The corner od the table was dinged and this area of damage reveals whats inside a table of this magnitude.  This table, even from years ago, was built on MDF just like all of our tables and just like all high end furniture today.  I thought I would share this picture with you as to ease your mind when getting overly concerned about MDF inside a table.  MDF will keep stable and will not abosorb moisture and/or warp or crack like solid wood.  There are good reasons to build mahogany dining tables on MDF versus solid mahogany dining table.
You may not be able to see the details of this photo, but it shows  MDF inside a Henredon Grand provenance. Keep in mind, this is luxury furniture with stiff price tags, This table probably sold near 10-13k in its time.