Some good sites out there on the web are:

Yes it is. For baby cows alone. Human beings cannot digest bovine breast milk. We are told that milk is a good source of calcium. It certainly is high in calcium but we cannot absorb it. The human body produces huge amounts of digestive acids in an attempt to break down this unnatural food. This acid has to be neutralised before leaving the body, with calcium. This is leached out of the calcium deposits of the body (bones and teeth). The result being that often more calcium passes out of the digestive system than was put in. This explains why the countries with the largest milk consumption also have the largest incidence of osteoporosis. Good sources of calcium are green leafy vegetables (Granny was right all along), broccoli, tofu, nuts, seeds, beans, tahini, and water.

Cows milk also contains the hormone IGF-1 (insulin like growth factor) which allows cancers to grow. This is the only hormone known to man, which is an exact match between two species - humans and cows. It has been shown that every single cancer diagnosed relies on this hormone for growth. (Related studies: Cramer DW, Harlow BL, Willet WC. Galactose consumption and metabolism in relation to the risk of ovarian cancer. Lancet 1989;2:66-71, Outwater JL, Nicholson A, Barnard N. Dairy products and breast cancer: the IGF-1, estrogen, and bGH hypothesis. Medical Hypothesis 1997;48:453-61, and Chan JM, Stampfer MJ, Giovannucci E, et al. Plasma insulin-like growth factor-1 and prostate cancer risk: a prospective study. Science 1998;279:563-5 and World Cancer Research Fund. Food, Nutrition, and the Prevention of Cancer: A Global Perspective. American Institute of Cancer Research. Washington, D.C.: 1997) Got Milk? No thanks. IGF-I has been shown to occur in increased levels in the blood by individuals consuming dairy products on a regular basis (ref:Cadogan J, Eastell R, Jones N, Barker ME. Milk intake and bone mineral acquisition in adolescent girls: randomised, controlled intervention trial. BMJ 1997;315:1255-69). Other sites on this subject:

'Milk - The Deadly Poison' - Want to know what's really in that white stuff? Robert Cohen tells it to you straight - you'll never want to drink it again!

Davie had rheumatoid arthritis, often missing months of work due to the pain and stiffness. It was getting gradually worse and the doctor had a range of drugs ready to try. Two months into veganism and this disappeared. We had tried cutting out acidic fruits/tomatoes etc. without much difference but the milk did it. Again, a life transforming change.