How a lot lead does natural hen bone broth get into?

“In the USA, lead poisoning still occurs despite extensive prevention efforts and strict regulations.” Ayurvedic dietary supplements marketed specifically for pregnant women, for example, exceeded safety levels by up to 4 million percent, making the use of Ayurvedic drugs and lead poisoning “a persistent problem in the United States ”made. In fact, “heavy metals are intentionally added to several Ayurvedic medicines,” although Ayurvedic practitioners claim that the practice should not be a cause for concern, since the “heavy metal detoxification process … includes the use of … cow urine” among other substances.

We have known for about half a century that calcium supplements can be an additional source of lead contamination. Those made from bones may have the highest levels of lead, but regular calcium supplements, including some from national brands, have also been contaminated.

In terms of our diet, the largest portion of lead intake by children and their parents may be dairy products, but the most concentrated source may be game shot with lead ammunition. However, concerns have been expressed by hunters that unleaded bullets do not have the same “wounding capacity”. However, CT scans of kills show that they do just as much damage[ing] that lead-free bullets are on a par with conventional hunting bullets in terms of their killing effect ”, also against ballistic soap, which apparently has a density similar to that of vital organs.

For example, workers in battery factories can be exposed to high levels of lead, but the number one non-work exposure is firearm shooting. It does not eat meat containing lead, it only trains target practice indoors. In fact, 75 percent of target shooters have elevated levels of lead in their blood as you can see at 2:02 in my video How much lead is there in organic chicken soup (bone broth)?. In the open air, lead released by the bullet rubbing against the barrel or primers containing lead can lead to significant lead pollution in both humans and native wild animals and contaminate the soil. The lead content in the ground at a shooting range was higher than in the vicinity of an industrial lead factory. However, most of the lead in urban soil comes from decades of use of leaded paint and gasoline, raising concerns about urban gardens. Although most of the lead in the soil is not absorbed by plants, it can stick to their leaves and roots. This is bad news as even plants from raised beds with clean soil can become contaminated in an urban setting, but the good news is that the lead can presumably simply be washed off. The health benefits of gardening and fresh produce “will likely more than offset the risks in most locations”.

What about backyard chicken eggs? They should be tested for lead as the lead gets into the eggs and therefore cannot be washed off. As you can see in mine at 3:22 Video, most of the lead ends up in the skeletons of birds, which begs the question: what happens when you try to make chicken soup?

There may be an upswing in people who boil bones, which is “promoted by proponents of the Paleolithic (or ‘paleo’) diet,” but the problem is that lead is a neurotoxin – not just a neurotoxin. Lead also adversely affects the bone marrow, digestive tract, kidneys, circulatory system, hormones and reproduction. Symptoms of high lead exposure include impaired cognition, anemia, abdominal pain, kidney problems, high blood pressure, miscarriages, memory problems, constipation, impotence, depression, poor concentration, and more. We also know from human studies that lead is bound in bones. If the bone turnover is high, for example during menopause or during pregnancy, the lead level in the blood can rise. However, this bump can be minimized during pregnancy by getting enough calcium and lowering sodium intake. When astronauts lose bones in space, the lead is released into their bloodstream. Ironically, because they are no longer exposed to all of the lead on earth, their total lead levels can go down. Bones can soak up lead so well that they can be sprinkled on shooting ranges to prevent lead from getting further into the area.

Researchers, concerned that cooking farm animal bones could release lead into the broth, made three types of organic chicken broth – one with bone, a second with boneless meat, and a third with boned skin and cartilage. All three broths exceeded the maximum allowable dose for lead – even the one made without bones. Surprisingly, the skin and cartilage broth was the worst, beating the safety level per one cup serving by about 475 percent.


  • Leading poisoning is a problem in Ayurvedic medicine and calcium supplementation, not just those made from bones.
  • Dairy products can be the largest contributor to our dietary lead intake, but game shot with lead ammunition can be the most concentrated source.
  • Shooting with firearms, even during indoor target practice, is the most important non-occupational lead exposure.
  • Airborne lead released from shooting can expose people and wildlife, as well as contaminate the soil, and concentrations in the soil have been found to be higher from a shooting range than near an industrial lead factory.
  • Most of the lead in urban soils comes from decades of use of leaded paint and gasoline.
  • Backyard chicken eggs should be tested for lead as it can get into the eggs and cannot be rinsed off.
  • Lead is bound in bones, and cooking the bones of farm animals can release lead into the broth.
  • In broths made from organic chicken bones, organic boneless chicken and organic boneless chicken skin and cartilage, lead was found that exceeded the maximum allowable dose.

Have you just experienced a little déjà vu? About two years ago I made a video about this exact study. When I was researching my extensive lead series last year, I came across the newspaper again and created the video for this article. When I realized that I had double-submerged the same study, I had fun looking back to see how such a different video can be produced around the same science. You can watch the first video at Lead contamination in bone broth.

I was alluding to my videos California children are contaminated and Filled with lead. For more information on lead, visit:

  • How the leading paint industry got away with it
  • Lead in drinking water
  • How the leaded gas industry got away with it
  • “Normal” lead levels in the blood can be toxic
  • The Effects of Low Lead Exposure in Adults
  • How to lower lead levels with diet: thiamine, fiber, iron, fat, fasting?
  • How can you reduce lead levels with your diet: breakfast, whole grains, milk, tofu?
  • Best foods for lead poisoning: chlorella, coriander, tomatoes, moringa?
  • Best food for lead poisoning: garlic
  • Can Vitamin C Help With Lead Poisoning?
  • Yellow Bell Pepper For Male Infertility And Lead Poisoning?
  • Lead contamination in hot sauces
  • The rise in blood lead levels during pregnancy and menopause
  • Should pregnant women take calcium supplements to lower lead levels?
  • Lead in calcium supplements
  • Can Vitamin C Help With Lead Poisoning?

Interested in the Paleo Diet? Here is the science I was able to find on it:

In health,
Michael Greger, MD

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