Is ashwagandha safe for your liver?
For healthy people the risk of liver injury appears small, but it is not negligible. If you have a liver condition, do not use ashwagandha without consulting your doctor.
Liver injury following ashwagandha use has been documented on multiple occasions. In five well-described cases from Iceland and the United States, people developed jaundice, itching, nausea and abdominal complaints. Symptoms began after two to twelve weeks of use. In four of the five cases, liver values normalised within one to five months after stopping. None of the patients in this series developed liver failure.
In people with a pre-existing liver condition, the picture is far more serious. In an Indian series of eight patients with ashwagandha-related liver injury, five already had chronic liver disease. Three of them developed acute-on-chronic liver failure, and all three died. The remaining patients recovered, although recovery was sometimes lengthy. This makes ashwagandha particularly risky if your liver is already not healthy.
In healthy people without liver complaints, a double-blind study in 80 adults who took 300 mg twice daily for eight weeks found no measurable changes in liver function or other safety parameters. However, eight weeks is a short period, and rare liver reactions only become apparent in much larger groups over longer periods of time.
The mechanism has not yet been fully clarified, but researchers suspect that compounds in ashwagandha are converted in the body into reactive substances that can cause oxidative stress in liver cells. This would explain why the damage remains minor and temporary in most people, but more severe in vulnerable individuals. Animal research even shows protective effects on liver cells, but this has not yet translated to humans.
This answer is based on several series of documented cases, a double-blind study in healthy adults, and mechanistic research in animals and cells. The cases provide a clear signal, but because the numbers are small, the actual risk in healthy users cannot be estimated well. In people with pre-existing liver disease the picture is alarming: all three patients with acute-on-chronic liver failure in the Indian series died. The double-blind study in healthy people lasted only eight weeks and was too small to detect rare side effects.
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Air pollution is seriously harmful: it increases your risk of lung and heart disease and costs millions of lives worldwide each year. Cleaner air, both through policy and through personal choices such as avoiding busy roads, demonstrably reduces that risk.
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Yes, multiple supplements are demonstrably risky in the presence of kidney damage. Herbal preparations (particularly those containing aristolochic acid), germanium supplements, and high doses of vitamin D or C stand out the most; if you already have kidney problems, discuss every supplement with your doctor.
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Microplastics are demonstrably present in your body and have been linked in laboratory and animal research to inflammation and organ damage, but how harmful ordinary daily exposure truly is for humans is not yet known. Limit your exposure as much as you can, but do not panic: the true scale remains unknown.
How do I keep my kidneys healthy as I age?
The two best-supported steps to limit kidney damage as you age are keeping your blood pressure under control and exercising regularly. Moderate salt intake and a healthy weight demonstrably contribute to both.
What really keeps your mouth and gums healthy?
Daily brushing supplemented with interdental brushes is the best foundation for a healthy mouth; if you have diabetes, regular gum care pays extra dividends for your blood sugar.