Hina mam
Your lagna is in Taurus at 29°49’45”, co-ruled by Venus-Mars-Saturn. Taurus is an earthy sign. Saturn is signifying Rahu in an airy sign. Moon is in Cancer a watery sign. Earthy sign gives fleshy body. Watery signs give plumpy body. Saturn generally gives a lean body, but strengthy.
Upto the age of 14 your are lean. From 1997 you started putting weight. Ketu even though it is in a fiery sign, is in his own star (signifying Jupiter in a watery sign) and in the sub of Jupiter. Jupiter is in a watery sign which is also in 6th house (sickness). I hope in Ketu period you had some illness and thereby the weight started increasing.
Good Luck
JVS Rao (KP system follower)