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 | - | - |