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From: Denise Minger (
Subject:         Correlation is not causation
Date: July 10, 2010 at 1:19 pm PST

In Reply to: Dr. Doug - The China Study? An 811 woman refutes it? posted by Lynn on July 9, 2010 at 5:25 am:

Hi Lynn,

The China Project is an epidemiological study, and because of that, it can only produce hypotheses -- never proof. Seeing two variables correlate positively, like plant protein and disease, only means that they happen to increase hand-in-hand. It doesn't prove that one causes the other, although it also doesn't exclude that possibility. Sometimes, there's another underlying variable to blame.

My critique is only intended to reveal errors in Campbell's analysis of the original data. It doesn't vilify veganism, but it does show that animal products can't be blamed for cancer and disease based on the China Study data.

My suggestion is to look at the data but not let it be the sole dictator of your decisions. At the end of the day, your body's reactions to a particular diet are more important than the results of any study, no matter how large and renowned it is.

Best of luck to you,


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