I would like to add to Kathy Dettwyler's excellent reference suggestions
and Dr. Jack's new one, a study that I can't remember how I found, but
that intrigued me. Much of the research focussing on cardiovascular
disease and infant feeding method looks into lipids and cholesterol. The
following reference looks at good old sodium. Look alive,
you wonderful dieticians out there!
Schaefer LJ, Kumanyika SK. Maternal variables related to potentially
high-sodium infant-feeding practices. Journal of the American Dietetic
Association, 85:433-438, 1985.

I am under the impression that the level of sodium in human milk is on
the low side of what is considered appropriate and safe for an infant
(0-6 mo, 5-15 mEq/day, 6-12 mo, 11-33 mEq/day Na - above reference).
Worthington-Roberts et al (1985 p. 257) report that cow's milk contains
22 mEq Na per liter.
How do formulas do on sodium?
Sorry, got carried away there. The Schaefer article speculated that bfing
moms were endowed with
other behaviors leading to lower blood pressure in their kids because of
delaying solids, types of solids.....anyhow, I got hypped on sodium. Do
you think there's anything here? Has there been any followup on
hypertension and infant feeding method?
Judy Knopf in Beer Sheva