Interesting synchronicity here.
First, Dr. Kats has recently been looking at iron (in a special form) as a potential adjunct to GPR109A (niacin + glutamate + folic). GPR109A doesn't seem to be enough for some of his sicker volunteer research subjects, so he did some more literature research and came up iron to provide another boost. He believes that most iron supplements are useless or even harmful because they frequently cause constipation. He says that iron citrate provides the iron in a bioavailable form without constipation.
Here's the synchronicity: just today, Kats posted a research article relevant to your request: Dietary deficiencies of iron and niacin in the aetiology of symptomatic gallstones. Conclusion: "... gallstone disease may be prevented by increasing dietary iron and niacin intake, for which there are plausible biological mechanisms." The study seemed to be conclusive about women. There weren't enough men in the study to reach a firm conclusion.
9.15.23: RINOS depart, TRUMP interview, Censorship on the rise, PRAY!
Jiminy cricket. Thank you.
*PING* to little jeremiah, hoping I’m not stepping on toes.