What pregnancy and breastfeeding information do you have regarding Bilberry (Vaccinium myrtillus)?
With such questions, it is always better to contact your doctor. As far as I know, these berries will not harm your child or you while breastfeeding. However, it is always better to get advice from a professional doctor, not the guys on the forum. Also, you can read this article to find the best products for mothers who feed breast milk
There is not enough scientific evidence to recommend the safe use of bilberry in pregnancy or breastfeeding, although eating bilberry fruit is believed to be safe based on its history of use as a foodstuff. One study used bilberry extract to treat pregnancy-induced leg swelling (edema), and no adverse effects were reported.