Question from Margaret

I have checked with the companies that sell clay plaster and they tell me kaolin clay is one of the ingredients. Since kaolin clay is somewhat radioactive, wouldn’t covering the walls of my home with it be ill advised? Or is it such a tiny amount that it is negligible? I have asked them this question and they won’t answer it (probably for liability reasons). I would love to know since clay plaster is beautiful and (apart from the radioactivity) nontoxic.

Debra’s Answer

Hmmm…I didn’t know about this. I clay-plastered my bathroom walls last year (photos coming soon) so I’ve got it on my walls–no warnings on the label, but there are no warnings on glossy magazines either, which use paper coated with kaolin…or ceramics, medicines, foods in which it is used as an additive, toothpaste, or cosmetics.

Kaolin is a naturally-occuring a clay, an aluminum silicate mineral. It is one of the most common found in sediments, soils, hydrothermal deposits, and sedimentary rocks. It is mined in Brazil, France, United Kingdom, Germany, India, Australia, Korea, the People’s Republic of China, and Georgia, Florida, and South Carolina.

Kaolinite can contain very small traces of uranium and thorium. While a single magazine made using kaolin does not contain enough radioactive material to be detected by a security monitor, radioactivitiy in a single magazine can be measured.

The EPA has a a whole page on uranium exposure. They say, “Uranium is a naturally-occurring element found at low levels in virtually all rock, soil, and water. Significant concentrations of uranium occur in some substances such as phosphate rock deposits, and minerals such as uraninite in uranium-rich ores.” My logic says that if it occurs in virtually all rock, soil, and water, and kaolin is found in soils and mineral deposits, kaolin probably has the same concentration of uranium as other naturally-occuring substances.

They also say, “A person can be exposed to uranium by inhaling dust in air, or ingesting water and food. The general population is exposed to uranium primarily through food and water. The average daily intake of uranium from food ranges from 0.07 to 1.1 micrograms per day. The amount of uranium in air is usually very small.” No mention is made of exposure from kaolin in consumer products.

My point here is, uranium is indeed very dangerous to health in very concentrated amounts, but at the other end of the spectrum, we are exposed to it every day from multiple sources. I always say it’s best to minimize exposure wherever possible, but I wouldn’t say that clay plaster is alarmingly radioactive. Our bathroom walls don’t glow in the dark and we haven’t noticed any ill health effects.

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Question from Sandy

I recently read your letters concerning cookware and I have a question:

My understanding is that All Clad’s magnetically-attractive Stainless Steel cookware is the safest choice for stainless steel.

What is your opinion, please?

Thank you!

Sincerely,

Sandy

Debra’s Answer

First of all, All Clad cookware has magnetic stainless steel on the OUTSIDE of the pan, not on the inside where it would come in contact with the food. So it has no relationship to food safety at all.

Why magnetic steel on the exterior? According to a review of All Clad at Epinions.com (which also states that All Clad takes longer to heat, requiring greater energy consumption), the exterior magnetic layer is there to allow these pans to be used on Induction cooktops. Because induction uses magnetic fields to heat the pan, not heat, specific types of cookware that work with the magnetic fields are needed–magnetic stainless steel, cast iron, and steel covered in enamel or porcelain. Glass, aluminum, copper, and non-magnetic steel will not work on induction cooktops. If you are not using induction, however, there is no reason to purchase magnetic steel cookware.

An article by Dr. Ray Peat, a biochemist. He says:

I checked around a few website to verify this idea that magnetic stainless steel contains less nickel than nonmagnetic, and indeed, it is true.

At http://www.azom.com/details.asp?ArticleID=1140 they say:

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Question from Tammy

Debra,

I try to avoid giving my 3 year old daughter candy but of course family like to give her candy and junk anyway. I hate that because they really don’t have a clue how bad most of that stuff is for kids or anyone for that matter. Anyhow, I was recently introduced to an all organic lollipop with the following ingredients:

Organic Evaporated Cane Juice, Organic Tapioca Syrup, Non GMO Citric Acid (made from beet sugar (not corn), Natural Flavors (May contain Watermelon, Pomegranate, Orange Oils, Lemon Oils, Raspberry, Mango), Natural Colors, (may contain Red Cabbage, Purple Carrots)

Now I can see there is no actual sugar in these suckers but I am not familiar with the Organic Evaporated Cane Juice and the Organic Tapioca Syrup. My question is what are these sweetners and what are the effects on my daughter? Just thinking that they can’t be as bad as sugar or corn syrup doesnt make it so. I am hoping you would know.

Thanks for any insite you can give. I enjoy your newsletter!

Tammy

Debra’s Answer

Organic Evaporated Cane Juice should be the whole juice from the sugar cane plant, with the water removed, but not refined. However, my experience has been that the labeling with regards to this may not always be accurate. I’ve called some companies that have this on the label and it could also mean something else.

Tapica syrup is a sweetener made from tapioca starch–the same tapioca used to make tapioca pudding. It is only available commercially. I don’t know anything about this sweetener.

It would be best to wean a child off of these kinds of treats completely.

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