A Chinese-Australian mother has spoken out about her horrible shopping experience, saying she feels judged by other parents when she buys baby formula for her toddler.

Young mother Gracie Leung, from Sydney, said she has been purchasing Bellamy's Organic milk formula when she stopped breastfeeding her two-year-old daughter Ava about six months ago.

But when the infant formula began emerging for double the price on Chinese eBay - sparking outrage among parents - the 34-year-old mother said she has felt the need to take her children with her to the shops to prove that she's not reselling the powder for profit in China.

Young mother Gracie Leung (left) has been purchasing Bellamy's Organic milk formula when she stopped breastfeeding her two-year-old daughter Ava (centre)

Parents have voiced their anger over the ongoing shortage of popular brand Bellamy's Organic milk formula.

'I feel horrible that I am being judged,' Ms Leung told Daily Mail Australia.

'Since the news broke, I have felt increasingly pressure coming from the looks of people who walk by the baby aisle - especially the supermarket staff and other parents.

'I feel like I need to take my children with me to the shops every time to prove that I actually have kids and I'm buying it for them.

'Not every Chinese person buying formula is trying to make a profit but now, I need to explain myself every time that I'm not reselling the formula for profit.'