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Table 2 Frequency of Dietary Supplements used by US adolescents (Weighted percents)

From: Factors and common conditions associated with adolescent dietary supplement use: an analysis of the National Health and Nutrition Examination Survey (NHANES)

Type of Dietary Supplement

N

% users all ages 11 to 19 years

% users age11–15

% users age16–19

P value between ages difference

Any dietary supplements

1128

27

26

28

0.27

Any vitamin/mineral

961

23

23

23

0.85

   Any Multivitamin

717

16

17

15

0.12

Non-prenatal

642

15

17

13

0.003

Prenatal

76

0.9

0.2

2

0.003

   Single Vitamins/Minerals

     

Vitamin C

222

6

6

7

0.43

Vitamin E

38

1

0.9

1

0.65

Vitamin B

35

1

0.8

1

0.50

Iron

28

0.5

0.1

0.9

0.004

Calcium

79

2

2

3

0.08

Any non-vitamin/mineral supplements*

185

4

4

5

0.06

Weight, sport, and enhancement supplements**

85

2

1

3

0.005

Herbal supplements***

80

2

2

3

0.39

Other non-herbal supplements****

36

1

1

1

0.25

  1. *All non-vitamin/non-mineral supplements include: weight loss, sport, and other enhancement supplements, herbal and other DS.
  2. **Weight loss, sport, and other enhancement supplements include: creatine, protein powders, stimulants, sport supplements, weight loss supplement, memory enhancers, or energy enhancing products.
  3. ***Herbal DS include: ginseng, gingko, garlic, echinacea, and other herbs.
  4. **** Other non-herbal DS examples include: fish oil, probiotics, melatonin, glucosamine, and other non herbal non vitamin dietary supplements.
  5. ***** Chi Square test of independence