The action of hormones changes the effectiveness of the epithelial barrier to bacterial insult and collagen maintenance and repair. An exaggerated inflammatory response of periodontal tissues may be seen during puberty, pregnancy and at the postmenopausal stage with the variation in the level of sex steroid hormone at different lifetimes.
Interesting review article. More research is needed.
Patients with a lower dietary intake or lower blood level of vitamin C showed a greater progression of periodontal disease.
Great study but be careful with eucalyptus remedies.  Ingesting even a small amount can be harmful so it is best left to professionally manufactured products.
The preliminary findings:
Psychological stress can down-regulate the cellular immune response. Excellent article here:
Medicinal versus herbal mouthwashes:
