The relationship between vegetarian diet and bone health remains unclear. According to some studies, a vegetarian lifestyle can be associated with vitamin B 12 deficiency and low bone mineral density.  However, a study of vegetarian and non-vegetarian adults in Taiwan found no significant difference in bone mineral density between the two groups.  Other studies, exploring animal protein's negative effects on bone health, suggest that vegetarians may be less prone to osteoporosis than omnivores, as vegetarian subjects had greater bone mineral density  and more bone formation. 
Oppressive and patriarchal conceptual frameworks are characterizednot only by value dualisms and hierarchies but also by "power-over" conceptions of power and relationships of domination (Warren1991b) and a logic of domination , ., a structure ofargumentation that provides the moral premise that superiorityjustifies subordination (Warren 1987, 1990, this section). On thisview, it is oppressive and patriarchal conceptual frameworks, and thebehaviors that they give rise to, that sanction, maintain, andperpetuate the twin dominations of women and nature.
Loma Linda University School of Public Health, Department of Nutrition developed The Vegetarian Food Pyramid  in 1997 for presentation at the 3rd International Congress on Vegetarian Nutrition.  The 5 major plant-based food groups (whole grains, legumes, vegetables, fruits, nuts and seeds) form the trapezoid-shaped lower portion of the pyramid. Optional food groups (vegetable oils, dairy and sweets) form the triangle-shaped top portion of the pyramid. This version of the pyramid includes a table with recommended number of daily servings per daily calorie intake.