. 2018 Aug 13;18:238. doi: 10.1186/s12906-018-2294-6

Table 6.

Use of dietary supplements

Dietary supplements	Used^a (%)	Use now (%)	Motivation^a (%)				Helpfulness^a (%) (Very and somewhat)
Dietary supplements	Used^a (%)	Use now (%)	Acute Illness^b	Long-term Illness^c	Improvement of well-being	Others	Helpfulness^a (%) (Very and somewhat)
Vitamin A	8.9	5.2	4.7	8.1	86.5	0.7	76.4
Vitamin B₁	5.0	2.8	4.8	14.5	80.7	0.0	78.4
Vitamin B₂	5.1	3.0	7.1	8.2	84.7	0.0	78.8
Vitamin B₆	3.3	1.9	0.0	9.1	90.9	0.0	74.6
Vitamin B₁₂	3.9	1.9	9.2	9.2	81.5	0.0	70.8
Vitamin C	35.1	27.1	1.4	5.0	92.3	1.4	74.0
Vitamin D	15.9	11.3	1.9	12.4	83.8	1.9	72.2
Vitamin E	3.8	2.0	3.1	6.3	90.6	0.0	78.1
Vitamin K	1.9	0.7	6.5	3.2	90.3	0.0	70.9
Multiple vitamin	22.0	18.8	0.5	5.2	92.9	1.4	73.6
Pantothenic acid	0.6	0.4	10.0	0.0	90.0	0.0	90.0
Biotin	1.9	1.1	3.1	18.8	78.1	0.0	59.4
Niacin	0.9	0.5	13.3	13.3	73.3	0.0	60.0
Folic acid	6.7	3.9	2.7	9.9	72.1	15.3	74.8
Iron	5.7	3.5	8.4	16.8	69.5	5.3	78.9
Calcium	11.9	7.6	2.0	11.1	85.4	1.5	68.7
Copper	0.4	0.2	0.0	0.0	100.0	0.0	50.0
Zinc	4.9	2.8	3.7	7.4	88.9	0.0	61.7
Magnesium	9.5	5.6	9.4	5.7	83.6	1.3	63.5
Potassium	4.1	2.0	7.4	11.8	80.9	0.0	70.6
Multi-mineral	6.1	3.7	2.0	6.9	91.1	0.0	67.3
Glucosamine	5.3	3.4	2.2	12.4	84.3	1.1	69.7
Chondroitin	0.2	0.1	0.0	0.0	100.0	0.0	100.0
Saw palmetto	0.2	0.2	0.0	75.0	25.0	0.0	75.0
Green juice	3.3	1.9	7.3	14.5	78.2	0.0	80.0
Collagen	3.5	1.7	6.8	15.3	78.0	0.0	67.8
Placenta	0.4	0.2	16.7	50.0	33.3	0.0	50.0
Blueberry	8.0	4.7	1.5	3.0	92.5	3.0	59.4
Red ginseng	30.8	21.5	1.0	5.1	91.8	2.1	75.7
Ginseng	4.6	2.8	1.3	3.9	94.8	0.0	77.9
Omega-3 fatty acid	29.2	21.0	1.2	9.9	87.7	1.2	67.4
Probiotic	15.8	11.2	3.0	13.3	83.3	0.4	78.1
Others	3.0	2.6	0.0	6.0	90.0	4.0	78.0
Not used	18.3	25.0	NA	NA	NA	NA	NA

Number of respondents: 1668

NA Not Applicable

^a in the last 12 months, ^b lasted less than 1 month, ^c lasted more than 1 month