O

Obesity

The simplest definition is excessive amount of body fat, measured as greater than 25 percent body fat for men and greater than 30 percent body fat for women. Expressed another way, obesity is greater than 10 percent above "normal" weight for a man or woman's height. Obesity is associated with increased risk of adult-onset diabetes, heart disease, and other potentially life-threatening conditions.

Optimal Daily Allowances (ODAs)

Each health-interested individual should seek to establish Optimal Daily Allowances for nutrients according to the individual's weight, age, health, absorption factors, exercise program, personal goals, etc. based on information that includes scientific and medical research, the advice of nutritions and other health care professionals, etc.

Ornithine (L-Ornithine)

[Also called L-Ornithine.] An important anti-aging amino acid that promotes growth and is a precursor of arginine. Arginine and ornithine are closely related. While arginine is incorporated into body proteins, ornithine is a tool used to make those proteins. The body converts arginine supplements into ornithine, and can convert ornithine supplements into arginine if needed.

Osteoporosis

The gradual loss of bone mineral content, which increases the risk of fracture and slows healing after fracture. Osteoporosis is common, for example, in older women following menopause. The loss of bone mineral can be influenced by diet and exercise.

Ovaries

Paired female reproductive glands that produce eggs, female sex hormones, and (in lesser quantities) male sex hormones.