Hi A.,
I use USANA vitamins at the moment and I did so while I was breastfeeding. I use the "Essentials".
My friend at work introduced me to them. I was originally drawn to them because my friend told me they were completely soluble and I did the test myself. My only problem with them is remembering to take them twice per day. For some reason my brain doesn't seem to connect with that for a vitamin, whereas I am normally compliant with any other form of medication and it's required frequency. For this reason, I didn't always get the right daily percentage - but that was my own fault.
My friend also told me that they gave her more energy. Personally, I did not notice this response, but I like them for other reasons.
The folate is 130%/day. However, the calcium is only 30% if you take both servings. There is nothing on the label or information that infers that they are for breastfeeding Moms and I did not feel that 30% was adequate for my calcium needs, so I chose to compensate for that.
They also have an "ask the scientist" option so your distributor should be able to access that for you with any questions you may have. I believe you can access it too once you are a member.
Hope this helps.
S.