Everyday toxins and fertility: what you actually need to know
There's a lot of anxiety out there about chemicals, plastics, and fertility — and a lot of misinformation too. Here's a grounded look at what the research actually shows, and the small changes that make the most difference.
The goal is not a perfect lifestyle overhaul
When it comes to environmental toxins and fertility, it's easy to fall into one of two extremes: either dismissing the issue entirely because it feels too overwhelming, or becoming anxious about every piece of plastic and fragrance in your home. Neither serves you well.
The research suggests that it is unusually high levels of exposure — not trace amounts — that are most likely to affect fertility. The most recent studies indicate that the chemicals most worth knowing about are bisphenols (including BPA) and phthalates, and that tackling the main sources of each can bring your exposure down quickly and meaningfully without replacing everything you own.
Why these chemicals matter for fertility
Both bisphenols and phthalates are what scientists call endocrine disruptors — they interfere with the hormonal signals that regulate the reproductive system. They can also damage developing eggs and sperm directly.
The story of BPA began with an accidental laboratory discovery in 1998, when researcher Dr. Patricia Hunt found that BPA leaching from damaged plastic cages caused a dramatic spike in chromosomally abnormal eggs in her mouse studies — from 1–2% to 40%. Subsequent human studies found that women with higher BPA levels before IVF had fewer eggs retrieved, fewer embryos, and lower pregnancy rates.
The good news is that BPA exposure has decreased significantly in recent years as manufacturers have phased it out, and at current typical levels of exposure it may no longer be impacting IVF outcomes for most people. However, women with the highest BPA levels are still found to be significantly more likely to miscarry — nearly twice as likely in some studies — so avoiding very high exposure remains worthwhile.
Phthalates are a slightly different story. They are still widely used and harder to avoid, particularly because they are used to help fragrances last longer — and a labelling loophole means companies can list phthalates simply as "fragrance" on a product label. Studies have found that couples with higher phthalate levels before IVF have a lower chance of pregnancy, and that high phthalate exposure is linked to increased miscarriage risk, possibly by reducing progesterone levels. The impact of phthalates appears to be amplified in those already dealing with conditions that place extra stress on antioxidant defenses — such as endometriosis, PCOS, male factor infertility, or age-related fertility decline.
There is also some encouraging evidence that a diet rich in folate from whole foods — think berries, broccoli, leafy greens, avocado, and lentils — may help counteract some of the negative effects of BPA on fertility outcomes. Good antioxidant status more broadly (including zinc and selenium) appears to buffer the impact of phthalates too.
Where these chemicals come from — and what to do about it
Research now gives us a clearer picture of which sources contribute most. Tackling the biggest contributors in each category is far more effective than worrying about every product equally.
Food — the biggest source
The single greatest contributor to BPA and phthalate exposure is now fast food and highly processed food. This is because the more processing a food undergoes, the more time it spends in contact with plastic equipment and containers — especially when heat and harsh cleaning chemicals are involved.
The key shift is toward minimally processed food made from whole ingredients at home. Plastic food packaging for fresh fruit, vegetables, and dry goods is generally not a significant concern — it's the processing, not the packaging, that matters most.
A few specific areas worth attention: oils, vinegars, sauces, and condiments in plastic bottles are worth swapping for glass, as fat and acid encourage chemical leaching. Canned food — even "BPA-free" cans — is still a notable source of bisphenols, so swapping canned tomatoes, beans, and tuna for fresh, frozen, jarred, or dried alternatives is a useful step. Hot takeaway food in plastic containers is also worth minimising — heat accelerates leaching considerably.
When you do use plastic, the safest options for cold or dry food are polypropylene (PP, or number 5) and high-density polyethylene (HDPE, or number 2).
Kitchen — where heat meets plastic
The key question for kitchenware is whether a plastic item comes into sustained contact with hot food or drinks. The highest-priority items to replace with glass or stainless steel are coffee machines with internal plastic parts, travel mugs, food storage containers used for hot food, microwave bowls, plastic kettles, colanders, and blender containers used with hot soups or sauces.
For making coffee without plastic, a stainless steel French press, pour-over, or classic percolator are all good options. Silicone cooking utensils are generally safer than other plastics, although silicone baking mats used at high heat for long periods are best avoided.
Fragrance — the most overlooked source
Perfume and cologne are among the highest sources of phthalate exposure — one study found that men who wore cologne regularly had eight times higher exposure to a specific phthalate than non-users, linked to significantly lower sperm concentration. Perfumes continue to contain high levels of phthalates even in countries where they are otherwise banned from personal care products.
Stepping away from perfume or cologne is one of the single highest-impact changes you can make. The next step is switching to fragrance-free versions of everyday products — body lotion is a higher priority than others because it is applied over a large surface area. Room fragrances, plug-ins, and fragranced candles are also worth removing.
When checking product labels, phthalates may appear as DEP, DBP, DMP, or DEHP — or simply as "fragrance." Another ingredient worth checking for is propylparaben, a preservative linked in multiple studies to lower follicle counts and higher FSH. Many brands have moved away from parabens, but it is worth checking labels on products you use frequently.
Cleaning & laundry products
This is a lower priority than food and personal care, but two changes can still make a meaningful difference. The first is stopping the use of fragranced plug-ins, air fresheners, and candles. The second is stopping fabric softener and dryer sheets — these contain not only phthalates but also quaternary ammonium compounds, which have been shown in animal studies to compromise fertility in both sexes. Wool dryer balls or diluted vinegar in the wash are effective alternatives.
For disinfecting, alcohol, hydrogen peroxide, and vinegar are safer options than products containing benzalkonium chloride or related quaternary ammonium compounds (found in Lysol and similar products). Fragrance-free conventional laundry detergent is generally fine.
A note on pregnancy
These same changes carry real benefits beyond conception. Lower phthalate exposure during pregnancy is linked to better infant brain development, fewer behavioural disorders, better language development in young children, and a reduced risk of premature birth. Creating a lower-toxin environment while trying to conceive gives your future baby a healthier start too.
The short version: where to start
Cook more meals at home from whole, natural ingredients
Minimise canned and highly processed food
Replace plastic kitchenware used with hot food or drinks with glass or stainless steel
Step away from perfume or cologne
Switch to fragrance-free personal care products
Remove room fragrances, plug-ins, fabric softener, and dryer sheets
This information is general in nature and is not intended as personalised medical advice. Please consult a qualified health professional with any specific concerns.