Bill Harris, M.D. | Q&A

Colloidal Mineral Supplements?
Q&A with Bill Harris, M.D.

Q. I have a question about Colloidal mineral supplements. They have every thing from Antimony to Zirconium. some of these are poisons and I'm concerned about the concentration. The dose is 1oz twice a day. What is this equal to 5lbs or 5tons of plant matter.

A. Dear Richard,

Without more reference I can't tell you much except that neither of these elements are listed in my biochem and nutrition texts and antimony is only reported to be less toxic than arsenic in my medical dictionary. Sounds like snake oil to me. The minerals you need are usually found in the food you eat. Neither of those are known to be essential nutrients.


-William Harris, M.D.

William Harris MD received a degree in physics from the University of California Berkeley, where he earned Phi Beta Kappa honors. He received his degree in medicine from the University of California at San Francisco, and received his postgraduate training at San Diego County Hospital. He holds a Medical License in the State of Hawaii. He has been an Emergency Department physican since 1963, and the Director of the Kaiser Permanente Vegan Lifestyle Clinic on Oahu until his retirement in 1998. Dr. Harris is the author of The Scientific Basis of Vegetarianism.

In addition, he was the 1950 Big Ten Trampoline Champion, is an accomplished hangglider and commercial pilot, and at age 70 became a skydiver with 108 jumps to date. Dr. Harris has been vegetarian since 1950, and vegan since 1963.

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