1) 2016 Intestinal Microbiota Distinguish Gout Patients from Healthy Humans
http://www.nature.com/articles/srep20602
"the intestinal microbiota of gout patients are highly distinct from healthy individuals in both organismal and functional structures"
"The established reference microbial gene catalogue for gout revealed disorder in purine degradation and butyric acid biosynthesis in gout patients"
2) 2001 Hyperuricemia and gout in thyroid endocrine disorders
http://www.clinexprheumatol.org/article.asp?a=1194
"In comparison to the prevalence reported in the general population, a significant increase of both hyperuricemia and gout was found in the hypothyroid patients, and of hyperuricemia in the hyperthyroid patients. In hyperthyroidism the hyperuricemia is due to the increased urate production, while in hypothyroidism the hyperuricemia is secondary to a decreased renal plasma flow and impaired glomerular filtration"
3) 2014 Hyperthyroid and Hypothyroid Status Was Strongly Associated with Gout and Weakly Associated with Hyperuricaemia
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0114579
"Both hyperthyroid and hypothyroid status were significantly associated with gout and weakly associated with hyperuricaemia. A thyroid function test for gout patients may by warranted"
4) 2013 Serum uric acid in relation to endogenous reproductive hormones during the menstrual cycle: findings from the BioCycle study
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3685334/
"Mean uric acid concentrations were highest during the follicular phase, and were inversely associated with E2 and progesterone, and positively associated with FSH."
5) 2002 Etiological role of estrogen status in renal stone formation
https://www.ncbi.nlm.nih.gov/pubmed/12394677
"The lower risk of stone formation in women may be due to the lower urinary saturation of stone forming salts. Estrogen treatment may decrease the risk of stone recurrence in postmenopausal women by lowering urinary calcium and calcium oxalate saturation"
6) 2008 Postmenopausal Hormone Replacement May Reduce Uric Acid Levels in Women
https://www.hopkinsarthritis.org/ar...acement-may-reduce-uric-acid-levels-in-women/
"The association of menopause with increased uric acid levels was partially abrogated in women using HRT"
7) 1991 Gout and Vitamin A Intoxication: Is There a Connection?
http://sci-hub.bz/10.1016/0049-0172(91)90030-4
A number of cases of increased uric acid levels have been reported following the use of isotretinoin (Accutane, Hoffman LaRoche, Nutley, NJ, 13-cis-retinoic acid), a synthetic derivative of vitamin A, for severe acne.“’ Hyperuricemia was detected after 16 to 109 days of treatment with 40 to 80 mg of isotretinoin daily.