Table 2

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

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


*All non-vitamin/non-mineral supplements include: weight loss, sport, and other enhancement supplements, herbal and other DS.

**Weight loss, sport, and other enhancement supplements include: creatine, protein powders, stimulants, sport supplements, weight loss supplement, memory enhancers, or energy enhancing products.

***Herbal DS include: ginseng, gingko, garlic, echinacea, and other herbs.

**** Other non-herbal DS examples include: fish oil, probiotics, melatonin, glucosamine, and other non herbal non vitamin dietary supplements.

***** Chi Square test of independence

Gardiner et al. BMC Complementary and Alternative Medicine 2008 8:9   doi:10.1186/1472-6882-8-9

Open Data