We know that there are a wide array of factors that put us at risk for breast cancer — such as genetics, motherhood and breast feeding — but there are also indications that exposure to toxins also can lead to the cancer as well.

According to The Daily Green, the timing of exposure to certain toxins may be critical. Even though cancer usually doesn’t show up until adulthood, the stage may well have been set in the womb or in early childhood.

So what should we look out for? Topping the list:

Avoid canned foods

Bisphenol A (aka BPA) is a chemical known to mimic hormones, and which has been linked to an increased risk for breast cancer and other diseases. It has been found in the liner of most canned fruits and vegetables.

Stay away from dry cleaning chemicals

Studies on Cape Cod have indicated that women who have been exposed to perchloroethylene (also called PCE or PERC) through their water sources, have an increased risk for breast cancer.

Don’t buy plastic water bottles

Water bottles are usually made from plastics that leach chemicals like BPA. Leaching of chemicals from plastic bottles is particularly common when the plastic bottles are warm, as can happen when bottles sit in the sun — so ixnay on drinking water from bottles left in the car and certainly don’t store water bottles in your trunk…as convenient as it may be! The alternative? Tap water (use a filter if necessary) — it’s better for you and the environment.

On that note…don’t use plastic in the microwave!

Despite the label on plastic containers claiming that they are “microwave-safe”, they still can leach BPA when heated. So, to be safe, only use glass or ceramic in the microwave.

Eat soy…in moderation

Is it dangerous or is it healthy? There’s been much ado about soy, and the answer is…as with anything…enjoy it in moderation. While plant estrogen (phytoestrogen) can mimic natural estrogen and studies show that high levels of soy supplements may increase the risk of breast cancer, the consensus is that including soy as part of a regular diet may be protective against breast cancer.

For more tips, check out The Daily Green.