Table 2.
Frequency (n) and percentage (%) of the use and non-use of various types of DS (registered users = 430).
| Types of DS | Group * | Not Used | Last Year | Monthly | Weekly |
|---|---|---|---|---|---|
| Fish oil | Group 1 | 273 (63.5) | 28 (6.5) | 12 (2.8) | 117 (27.2) |
| Omega-3 fatty acids | Group 1 | 165 (38.4) | 40 (9.3) | 11 (2.6) | 214 (49.9) |
| Multivitamin/-mineral | Group 2 | 227 (52.8) | 43 (10.0) | 10 (2.3) | 150 (34.9) |
| Vitamin A | Group 3 | 398 (92.6) | 9 (2.1) | 2 (0.5) | 21 (4.9) |
| Vitamin D | Group 3 | 102 (23.7) | 44 (10.2) | 10 (2.3) | 274 (63.7) |
| Vitamin E | Group 3 | 389 (90.5) | 17 (4.0) | 5 (1.2) | 19 (4.5) |
| Vitamin C | Group 3 | 206 (47.9) | 61 (14.2) | 34 (7.9) | 129 (30) |
| Vitamin K | Group 3 | 377 (87.7) | 17 (4.0) | 1 (0.2) | 35 (8.2) |
| Vitamin B12 | Group 3 | 220 (51.2) | 63 (14.7) | 14 (3.3) | 133 (31) |
| Folic acid/folate | Group 3 | 346 (80.5) | 30 (7.0) | 3 (0.7) | 51 (11.9) |
| Iodine | Group 3 | 385 (89.5) | 15 (3.5) | 3 (0.7) | 27 (6.3) |
| Calcium | Group 3 | 298 (69.3) | 31 (7.2) | 8 (1.9) | 93 (21.7) |
| Iron | Group 3 | 337 (78.4) | 39 (9.1) | 11 (2.6) | 43 (9.9) |
| Zink | Group 3 | 355 (82.6) | 22 (5.1) | 4 (0.9) | 49 (11.1) |
| Magnesium | Group 3 | 151 (35.1) | 43 (10.0) | 16 (3.7) | 220 (51.1) |
| Selenium | Group 3 | 386 (89.8) | 11 (2.6) | 1 (0.2) | 32 (7.4) |
| Chromium | Group 3 | 380 (88.4) | 19 (4.4) | 4 (0.9) | 27 (6.3) |
| Probiotics/prebiotics | Group 4 | 327 (76.0) | 49 (11.4) | 7 (1.6) | 47 (10.9) |
| Omega 6 fatty acids | Group 4 | 370 (86.0) | 17 (4.0) | 2 (0.5) | 41 (9.5) |
| CLA | Group 4 | 419 (97.4) | 6 (1.4) | 0 (0.0) | 5 (1.2) |
| Q10 | Group 4 | 406 (94.4) | 12 (2.8) | 4 (0.9) | 8 (1.8) |
| Garlic | Group 4 | 308 (71.6) | 26 (6.0) | 34 (7.9) | 62 (14.4) |
| Ginseng | Group 4 | 405 (94.2) | 12 (2.8) | 5 (1.2) | 8 (1.9) |
| Valerian | Group 4 | 419 (97.4) | 10 (2.3) | 0 (0.0) | 1 (0.2) |
| Red sunflower/echinacea | Group 4 | 406 (94.4) | 15 (3.5) | 7 (1.6) | 2 (0.4) |
| Rhodiola rosea | Group 4 | 415 (97.6) | 6 (1.4) | 2 (0.5) | 2 (0.4) |
| St. John’s wort | Group 4 | 421 (97.9) | 5 (1.2) | 3 (0.7) | 1 (0.2) |
| Collagen Plus | Group 5 | 384 (89.3) | 18 (4.2) | 2 (0.5) | 26 (6.0) |
| Medox | Group 5 | 417 (97.0) | 6 (1.4) | 2 (0.5) | 5 (1.1) |
| VitaPro | Group 5 | 411 (95.6) | 9 (2.1) | 0 (0.0) | 10 (2.3) |
| Glucosamine | Group 5 | 409 (95.1) | 14 (3.3) | 0 (0.0) | 7 (1.6) |
* The DS users were categorized into five groups: (1) omega-3 fatty acids or fish oil users, (2) multivitamin or -mineral users, (3) single-vitamin or -mineral users, (4) non-vitamin or -mineral users, and (5) users of the DS marketed specifically for RMDs.