Your sister-in-law never breastfed any of her 5 children because her husband didn't want her to breastfeed.How will this affect her health?

I'd be more concerned with the children's health than I would be with hers. It's well proven that babies who get fed too much formula develop fat cells that their breast fed counterparts don't have, and thus are much more prone to obesity and all the health problems that go with that in later life. I think your brother has a serious PROBLEM, he really does. Breastfeeding is natural, and it's much healthier for the baby than formula feeding is. Breastfed babies have fewer problems with allergies, and they tend to have much stronger immune systems than their bottle fed counterparts, because one of the single biggest ways that women infer passive immunity to disease on their infants is through breast milk. It contains antibodies that help protect the baby from infection. NO man-made formula ever has this, no matter who makes it.

As for the children's mother, her biggest risk from not breast feeding is a slight increase in her chances of developing breast cancer. Otherwise, the risk of other illnesses is more or less the same as for anyone else.

Breast feeding  or not breast feeding won't impact a woman's future health in any way.

No matter what "Favorite Answer" said, there is no research that has ever  suggested that a woman who never breast feeds is at a  higher risk to develop breast cancer than is a woman who does breast feed. What about women who adopt?  THEY can't breast feed, and they're at no higher risk to develop breast cancer.

My mother raised four children and never breast feed any of us.

She NEVER developed breast cancer.

She lived to the age of 84.

She did have a stroke at the age of 73, but survived and returned completely to normal.  (and a stroke would NOT be related to not breast feeding.)

I would say that not breast feeding had NO impact on her health.

As for me and my siblings.  I am the youngest at 55 and my oldest sister is 70.  We also don't have any issues that could be blamed on "momma  didn't breast feed them".

What's with the obsession about other women's personal choices and these hypothetical questions?  

He children will have soft scalps of they didn't receive breast milk.