Y cynhyrchion sy'n gwasanaethu anghenion iechyd y boblogaeth. According to WHO, these products should be available “at all times,in adequate amounts in the appropriate dosage forms, with assured quality and adequate information, and at a price the individual and the community can afford”. Y cynhyrchion sy'n gwasanaethu anghenion iechyd y boblogaeth. According to WHO, these products should be available “at all times,in adequate amounts in the appropriate dosage forms, with assured quality and adequate information, and at a price the individual and the community can afford”.