If Newtypes are "evolved" to allow humans to live in space, does that mean they avoid all the health problems that plague a human who lives in a low gee environment for more than a few weeks?

Such health problems include (according to http://www.projectrho.com/public_html/rocket/lifesupport.php#id--Requirements--Artificial_Gravity):

fluid loss
electrolyte imbalances
cardiovascular changes
red blood cell loss
vertigo and spatial disorientation
space adaptation syndrome aka "drop sickness"
loss of exercise capacity
degraded smell and taste
weight loss
flatulence
changes in posture and stature
changes in coordination
muscle damage
bone damage (1% to 1.5% per month, like osteoporosis)
hypercalcemia
immune system changes and accelerated aging
permanent degraded vision (so far only observed in male astronauts)