The following represents a partial statistical symptom summary of 1569 patients who participated in six different studies evaluating the health effects of replacing mercury-containing dental fillings with non-mercury containing dental fillings. The data was derived from the following studies: 762 Patient Adverse Reaction Reports submitted to the FDA by the individual patients; 519 patients in Sweden reported on by Mats Hanson, Ph.D.; 100 patients in Denmark performed by Henrik Lichtenberg, D,D.S.; 80 patients in Canada performed by Pierre Larose, D.D.S.; 86 patients in Colorado reported on by Robert L. Siblerud, O.D., M.S., as partial fulfillment of a Ph.D. requirement and 22 patients reported on by Alfred V. Zamm, M.D., FACA, FACP. The combined total of all patients participating in the six studies was 1569.
| % OF TOTAL REPORTING | SYMPTOM | NUMBER REPORTING | NO. IMPROVED OR CURED | % OF CURE OR IMPROVEMENT |
| 14% | ALLERGY | 221 | 196 | 89% |
| 5% | ANXIETY | 86 | 80 | 93% |
| 5% | BAD TEMPER | 81 | 68 | 89% |
| 6% | BLOATING | 88 | 70 | 88% |
| 6% | BLOOD PRESSURE PROBLEMS | 99. | 5 | 54% |
| 5% | CHEST PAINS | 79 | 69 | 87% |
| 22% | DEPRESSION | 347 | 315 | 91% |
| 22% | DIZZINESS | 343 | 301 | 88% |
| 45% | FATIGUE | 705 | 603 | 86% |
| 15% | GASTROINTESTINAL PROBLEMS | 231 | 192 | 83% |
| 8% | GUM PROBLEMS | 129 | 121 | 94% |
| 34% | HEADACHES | 531 | 460 | 87% |
| 3% | MIGRAINE HEADACHES | 45 | 39 | 87% |
| 12% | INSOMNIA | 187 | 146 | 78% |
| 10% | IRREGULAR HEARTEEAT | 159 | 139 | 87% |
| 8% | IRRITABILITY | 132 | 119 | 90% |
| 17% | LACK OF CONCENTRATION | 270 | 216 | 80% |
| 6% | LACK OF ENERGY | 91 | 88 | 97% |
| 17% | MEMORY LOSS | 265 | 193 | 73% |
| 17% | METALLIC TASTE | 260 | 247 | 95% |
| 7% | MULTIPLE SCLEROSIS | 113 | 86 | 76% |
| 8% | MUSCLE TREMOR | 126 | 104 | 83% |
| 10% | NERVOUSNESS | 158 | 131 | 83% |
| 8% | NUMBNESS ANYWHERE | 118 | 97 | 82% |
| 20% | SKIN DISTURBANCES | 310 | 251 | 81% |
| 9% | SORE THROAT | 149 | 128 | 86% |
| 6% | TACHYCARDIA | 97 | 68 | 70% |
| 4% | THYROID PROBLEMS | 56 | 44 | 79% |