Pa asesiad y mae Llywodraeth Cymru wedi'i wneud o faint o fetelau trwm fel plwm a geir mewn gwaed dynol?
Wedi'i ateb gan Y Gweinidog Iechyd a Gwasanaethau Cymdeithasol | Wedi'i ateb ar 08/07/2022
The Welsh Government has not made an assessment of heavy metals found in blood. The Welsh Blood Service, in line with other UK blood services, do not test samples from donors for heavy metals and there are no recommendations to do this.