Reporter: If there's one thing actress alicia silverstone isn't clueless about -- as if. Reporter: It's promoting her ideas about healthy living. She has been an advocate for the raw food diet,... See More
Reporter: If there's one thing actress alicia silverstone isn't clueless about -- as if. Reporter: It's promoting her ideas about healthy living. She has been an advocate for the raw food diet, prechewing her son's food, mouth-to-mouth. Now, she is helping a special group of mothers who can't breast-feed. She's launching a breast milk sharing project for vegans only. Women who can't breast-feed who would love their babies to get breast milk from moms who eat zero animal products. She writes on her blog, because we're a community of beautiful souls who recognize the importance of food as health, i say we help support those mommas and babies who need a hand during one of the most important times in their lives. You're in this incredibly vulnerable place. Reporter: Alisa says her breast milk brainchild was the inspiration of this woman, rachel holtzman, a vegan friend who had breast reduction surgery a few years before her pregnancy and was having trouble making milk for her son. I sought out vegan breast milk because I come to this as a food is medicine standpoint. Reshe reached out to her friend for help. And donations have poured in. Women have been incredibly generous. I'm hoping with their help we can keep levi exclusively breast fed for as long as possible. Reporter: Some say that while her heart is in the same place, her initiative should include screening the milk for diseases. Breast-feeding is fantastic. It promotes excellent health for a newborn. But unscreened breast milk has a lot of concerns, such as transmission of viruses such as hiv, hepatitis, bacteria, such as syphilis. Reporter: Rachel feels taking into account the breast milk donor's lifestyle is key. Instead of having to ask personal questions, going to a place like the kind life took that out of the equation. And we could make the safe assumption that the person on the donating end valued those things as much as we did. Reporter: For "good morning america," abbie boudreau, abc news, los angeles. Joined by abc news senior medical contributor, dr. Jen ashton. What's going on here? There's a lot going on. The biggest question that people have is itsafe? Are there risked associated feeding your child a stranger's breast milk? It is a bodily fluid. When you do this public human milk banking. The mother has to go through a screening process. And of course, the milk is tested for communicable diseases. And then, it's pras chasturized. There's five squeamish anchors at this table. It is best for baby to get fed with breast milk. But that's not a reality. But that's not possible for all mothers. So, this is a great option. And we need to bust the uneasiness. What do you think about the service alicia is saying? I think it's fantastic. Anytime we have a dialogue in this country about breast-feeding and are able to offer support, not just babies, but moms who want to breast-feed who might not be able to or choose not to, that's a good thing. We need to get over the emotional aspects that it's not for all women. If it's not for you, fine. This is a great option. Sam is sweating less opinion. I mean -- someone else's bodily fluid -- that's right. You would recommend as a doctor, someone else's breast milk for a patient's child? If it's screened and tested. Over formula? Absolutely. If women are okay with that and it's tested. It's absolutely appropriate. A modern-day wet nurse. Pushing the envelope. Why am I looking at seven glasses of milk here? This is the amount. This is not a little amount. You need 100 ounces minimum. That's why we're sitting here with these. We're talking about a
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