- Adolescents
- Alcohol drinkers
- Athletes
- Dieters
- Drug users, prescription or recreational
- Elderly
- Health fanatics
- Junk food regulars
- Overweight and obese people
- People who supplement with specific nutrients
- Sick people
- Stressed out people
- Smokers
- Women who are pregnant, nursing, or taking oral contraceptives
- Workaholics
Source: Cf Balch, P (2006), Prescription for Nutritional Healing, Fourth Edition. New York: Avery/Penguin, p. xv.