Dangerous toxins found in baby formulas prompting mums to extend breastfeeding and research relactation

Growing awareness of potentially dangerous toxins in some top-selling infant formulas is prompting parents to reconsider their feeding choices. Many are exploring a transition back to exclusive breastfeeding rather than continued formula use.

Recent precautionary recalls of infant formula linked to possible cereulide contamination (heat-resistant cytotoxin produced by Bacillus cereus) have intensified concerns about formula safety. This latest scare follows closely on the heels of the post-COVID formula crisis, when factory shutdowns linked to contamination risks, including rat infestations and rust in production facilities, disrupted supply chains and deteriorated consumer confidence.

In response, mothers are actively seeking information about relactation — the process of restarting or increasing breastmilk production after a period of limited, mixed, or no breastfeeding. They are doing this in the hope of reducing their baby’s exposure to potential toxins.

One common question among mothers considering relactation is whether nipple shields can help transition a baby back to the breast. The familiar silicone texture, similar to a bottle teat, may make it easier for babies to accept breastfeeding again. Nipple shields are thin silicone covers placed over the nipple and are sometimes recommended by lactation experts to protect from pain or to help babies establish a latch.

However, they are generally regarded as a short-term support tool, not a standalone relactation strategy. Clinical guidance, including from the Cleveland Clinic, cautions that nipple shields do not directly stimulate milk production and, if used long-term — particularly more rigid designs - may reduce milk transfer.

Successful relactation typically depends on frequent, effective breast stimulation, including regular nursing, skin-to-skin contact, pumping, breast compressions and personalised support from a lactation consultant. While a nipple shield can sometimes help a baby remain attached long enough for stimulation to occur, it is unlikely to replace these core strategies.

For mothers concerned about formula contaminants such as cereulide, working closely with a qualified lactation specialist can help create a relactation plan that supports milk supply safely, sustainably and with confidence.

This is not medical advice. For medical advice, please consult your health professional.