Is lead in toothpaste a health crisis? Recently, headlines have emerged suggesting that many popular toothpaste brands, including major household names, contain detectable levels of heavy metals like lead, arsenic, mercury, and cadmium. These revelations stem from community-funded independent testing, such as the recent project by Lead Safe Mama, LLC that has tested over 400 consumer products. As this is not peer reviewed science, we felt we should review the scientific rigor of the results and put the findings into context to prevent the type of panic and reaction we typically see when this news makes the rounds.
Much of the information from this article is derives from the website and from some questions I shot over to the owner of Lead Safe Mama – to her credit, I received a quick response.
Understandably, the idea of lead in your toothpaste is unsettling. This is especially true for children, as studies have shown that they absorb heavy metals at higher rates and, due to their smaller size and critical development period, can be affected more by the bioaccumulation.
But before you panic or toss your tube, let’s dive into the scientific methods, regulatory standards, health implications, and most importantly, context behind these findings.
How Were These Tests Conducted, and Are They Reliable?
The testing was done through SimpleLab (and Purity Laboratories), a respected environmental testing platform that uses a network of over 200 certified labs across North America. These labs are typically accredited under rigorous standards such as:
- ISO/IEC 17025 – the gold standard for laboratory accuracy and reliability.
- NELAC and EPA certifications – ensuring standardized procedures and validated results.
For the toothpaste samples, SimpleLab used advanced techniques like Inductively Coupled Plasma Mass Spectrometry (ICP-MS), which can detect metals at trace concentrations (parts per billion).
Each toothpaste product was generally tested once by a certified lab. While single-sample testing doesn’t account for batch variability or re-verification, these labs employ strict internal protocols and Lead Safe Mama has confirmed that they will resubmit samples if they suspect erroneous results.
The Concern? As per the lab guidelines, samples are collected at home by the person requesting the sample, and we could find no information about on the methodology of how Lead Safe Mama, LLC collects samples or whether they take appropriate lab measures to collect samples. Another major concern is that although the labs are accurate, only testing each sample once and by one lab is a significant risk.
Bottom line? These are not pseudoscientific tests. They’re using legitimate, regulated science. However, there is a risk in inaccurate data when the samples are collected by the home tester (not the lab), and when a sample and brand is only tested once. The ideal method would be to test each sample 3 takes and take and average.
What Did the Testing Actually Find?
The summary table shows a summary of the various tests that have been run on 53 commercial toothpaste brands, many of which are marketed specifically for kids.
| Detection Range | Lead (Pb) | Arsenic (As) | Mercury (Hg) | Cadmium (Cd) |
|---|---|---|---|---|
| 0 ppb (ND) | 35% | 35% | 53% | 65% |
| 1–99 ppb | 24% | 22% | 20% | 18% |
| 100–199 ppb | 8% | — | — | — |
| 200–299 ppb | 8% | — | — | — |
| 300–999 ppb | 12% | — | — | — |
| ≥1,000 ppb | 10% | — | — | 4% |
While around 20% of samples tested contained a low level of Arsenic, Mercury and Cadmium, Lead was relatively more prevalent in toothpaste samples, with some samples showing very high concentrations.
How Do These Levels Compare to Foods, Nature, and Regulations?
Let’s put these findings into context.
- The FDA’s current limit for lead in adult personal care products is 20,000 ppb.
- The limit for children’s products (like candy) is 10,000 ppb.
- Washington State has set a more aggressive cosmetic limit at 1,000 ppb.
- A proposed (but not passed) federal bill, the Baby Food Safety Act, suggested an “action level” of just 5 ppb, far lower than existing standards.
In natural environments, lead levels in foods and soils often range from 100–300 ppb. Many common foods contain detectable lead due to soil uptake, including:
- Sweet potatoes
- Carrots
- Cocoa/chocolate
- Certain imported spices
- Tap water (in some areas)
- Dark leafy greens grown in urban soils
Even dark chocolate and baby food have come under scrutiny for their natural or process-related lead content.
So what about other heavy metals? The table below summarizes some main sources of these heavy metals in our daily lives. Keep in mind that about 1/5th of toothpastes tested had levels between 1-99 ppb.
🟤 Arsenic
- Naturally present in groundwater and soil, especially in areas with volcanic rock or mining history.
- Common in foods that absorb a lot of water during growth—especially rice.
- Also found in leafy greens, grapes, apples, and seafood.
Typical levels in food:
- Rice (white): ~100–200 ppb total arsenic (can be higher depending on origin)
- Brown rice: ~200–400 ppb
- Leafy greens & apple juice: 5–50 ppb
- Drinking water (EPA limit): 10 ppb
⚠️ Inorganic arsenic—the most toxic form—can make up 40–100% of the arsenic in rice.
🟢 Cadmium
- Naturally found in soil and taken up by plants, especially leafy crops.
- Also comes from phosphate fertilizers and industrial pollution.
- Found in leafy vegetables, cereals, sunflower seeds, and shellfish.
Typical levels in food:
- Leafy greens (spinach, lettuce): ~40–80 ppb
- Grains (wheat, rice, oats): ~10–50 ppb
- Shellfish (oysters, mussels): ~100–300 ppb
- EFSA tolerable weekly intake: 2.5 µg/kg body weight (for cadmium)
⚠️ Cadmium accumulates in the body over time—particularly in the kidneys.
🔵 Mercury
- Mercury in food is mostly methylmercury, a neurotoxic compound that bioaccumulates in fish.
- Found mostly in large predatory fish (tuna, shark, swordfish), but also in seaweed, rice, and some teas.
Typical levels in food:
- Canned light tuna: ~120 ppb
- Albacore tuna (white): ~350 ppb
- Swordfish: ~1,000 ppb or more
- Rice: ~5–15 ppb
- Seaweed (kombu, wakame): up to 50–150 ppb in some samples
- EPA Reference Dose for methylmercury: 0.1 µg/kg/day
⚠️ Mercury crosses the placenta and affects fetal brain development, making it a major concern for pregnant women.
So yes, many toothpaste brand show a meaningful result, but it’s not unique, nor is it the highest exposure source in daily life. But is our daily ingestion of Lead a concern? Definitely.
Where Are the Heavy Metals Coming From?
Ever wonder how heavy metals like lead, arsenic, or mercury end up in your toothpaste? They’re not added intentionally, but they often find their way in through the natural ingredients used in many “clean” or “natural” formulations.
Mineral-based ingredients are the biggest source. Take bentonite clay, for example, it’s popular in “detox” or whitening toothpastes, but since it’s dug from the earth, it often contains trace amounts of lead and arsenic. Calcium carbonate, another common abrasive or whitening agent, can also carry lead depending on the rock it’s sourced from. And hydroxyapatite, used in fluoride-free pastes to help remineralize teeth, is sometimes derived from animal bone or phosphate rock, both of which may include heavy metals if not highly purified.
Contamination can also come from the manufacturing environment or even the packaging. Older studies show that some toothpaste tubes, especially those with metal linings, can leach lead into the product. And if a brand manufactures in areas with high industrial pollution or uses poorly filtered water, environmental metals could make their way in during production.
The bottom line? These metals aren’t deliberately added, but without proper sourcing and purification, they can show up anyway. That’s why third-party testing and transparency matter, especially for products used twice a day, every day, often by children.
Is My Toothpaste A Major Source of Lead Contamination?
Toothpaste is used twice a day, but only a pea-sized amount (roughly 0.25 grams) per use is recommended—most of which is spit out. Even if a small portion is swallowed, the actual amount of lead ingested is tiny. If a child swallows ~0.25g of toothpaste containing 400 ppb lead, they might ingest ~0.1 µg (micrograms) of lead per use, or ~0.2 µg/day (twice-daily brushing).
To put this into context, FDA and EPA studies have estimated that adults ingest 1.5 – 5 micrograms (µg) on average every single day. For children, this range is estimated to be 3-6 micrograms (µg) as they may absorb a higher percentage of lead from various sources (~50% vs. ~10% in adults).
Moreover, your body does excrete lead—primarily through urine and feces. But here’s the catch: not all of it. Some is stored in bones and soft tissue, especially in children, and may accumulate over time.
This is why pediatricians emphasize that no level of lead is truly “safe” for children. Small, repeated exposures from multiple sources, food, dust, water, and now possibly toothpaste, can add up, especially for developing brains.
So… Should You Stop Using Your Toothpaste?
Here’s a science-based conclusion:
- The lead levels found in most toothpaste are below federal action thresholds but above the strictest proposed limits.
- If your toothpaste contains clay-based or natural remineralizing agents, it’s more likely to contain trace heavy metals.
- For adults, the cumulative risk from toothpaste may be low, but for children—who absorb up to five times more lead than adults and are at greater developmental risk—switching to a low- or non-detect toothpaste is a smart, simple precaution. There is no downside to reducing our overall exposure to heavy metals where we can.
- Transparent testing and reformulation should be demanded—not just from indie brands, but also from major multinationals.
Takeaway: Context Over Panic
The presence of lead in toothpaste should not be ignored—but neither should it be sensationalized or cause panic. We live in a world where trace contaminants exist in many natural products, and responsible decisions must be guided by dose, frequency, and risk—not fear.
Instead of panic, this moment is a call for more rigorous transparency, stricter sourcing standards, and clear labeling—so consumers can make informed choices about what they’re putting in their mouths every single day.
