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Table 3 Dosage recommended for nutritional supplements (NSs) offered by the companies online and dosage tested

From: Nutritional supplements for diabetes sold on the internet: business or health promotion?

Ingredient N° of websites on which the dosage was specified/websites selling the relative NS Dosage per day (mg) indicated in the website Dosage tested (mg) Reference
Alpha Lypoic Acid 1/6 600 300 Ansar et al., 2011 [14]
600 de Oliveira, 2011 [15]
600/1200/1800 Bartlett, 2008 [16]
600/1200/1800 Lee, 2011 [17]
Gymnema sylvestre 1/6 2700 400 Leach, 2007 [18]
Magnesium 3/5 300 (2 websites) 365 Mooren, 2011[19]
768 (1 website) 291.6 – 745.2 Bartlett, 2008 [17]
Chromium 2/5 0.3 0.02 – 1 Bartlett, 2008 [16]
0.66 0.04 Sharma, 2011[20]
0.5 Kròl, 2011[21]
0.5 – 1 Ali, 2011[22]
1 Cefalu, 2010 [23]
Zinc 3/4 15 10 Shidfar et al., 2010 [24]
54 30 Bartlett, 2008 [16]
78 50 Hussain, 2006 [25]
Camellia sinensis 2/4 40 150 – 600 Neyestani, 2010 [26]
1800 375 – 750 MacKenzie, 2007 [27]
Biotin 2/3 0.2 2 Albarracin, 2008 [28]
2 Geohas, 2007 [29]
5 Revilla-Monsalve, 2006 [30]
Momordica charantia 1/3 2700 1000 Ooi, 2010 [31]
500-2000 Fuangchan, 2011[32]
Trigonella foenum-graecum 0/3 - 2800 Losso, 2009 [33]
Vaccinium myrtillus 1/3 100 - -