In observational studies both across countries and within single populations, higher dairy intake has been linked to increased risk of prostate cancer.
Observational cohort studies have shown higher dairy intake is linked to higher ovarian cancer risk.
Cow’s milk protein may play a role in triggering type 1 diabetes through a process called molecular mimicry.
Across countries, populations that consume more dairy have higher rates of multiple sclerosis.
In interventional animal experiments and human studies, dairy protein has been shown to increase IGF-1 (Insulin-like Growth Factor-1) levels. Increased levels of IGF-1 has now been implicated in several cancers.
In interventional animal experiments and human experiments, dairy protein has been shown to promote increased cholesterol levels (in the human studies and animal studies) and atherosclerosis (in the animal studies).
The primary milk protein (casein) promotes cancer initiated by a carcinogen in experimental animal studies.
D-galactose has been found to be pro-inflammatory and actually is given to create animal models of ageing.
Higher milk intake is linked to acne.
Milk intake has been implicated in constipation and ear infections.
Milk is perhaps the most common self-reported food allergen in the world.
Much of the world’s population cannot adequately digest milk due to lactose intolerance.
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“Consumption of dairy products, particularly at age 20 years, was associated with an increased risk of hip fracture in old age.”
(“Case-Control Study of Risk Factors for Hip Fractures in the Elderly”. American Journal of Epidemiology. Vol. 139, No. 5, 1994).
“These data do not support the hypothesis that higher consumption of milk or other food sources of calcium by adult women protects against hip or forearm fractures.”
(Source: Feskanich D, Willett WC, Stampfer MJ, Colditz GA. Milk, dietary calcium, and bone fractures in women: a 12-year prospective study. American Journal of Public Health. 1997)
“The countries with the highest rates of osteoporosis are the ones where people drink the most milk and have the most calcium in their diets. The connection between calcium consumption and bone health is actually very weak, and the connection between dairy consumption and bone health is almost nonexistent.”
(Amy Lanou Ph.D. Nutrition director for the Physicians Committee for Responsible Medicine. Washington, D.C)