Side Effects
Taking turmeric by mouth seems not to bring any side effects, especially if used at the right doses. It is safe for usage in 8 grams daily intake for up to 2 months, 3 grams up to 3 months. Higher doses of turmeric extracts may seem lethal on some people, with side effects from dizziness, stomach troubles, or nausea. Applying turmeric to the skin is considered safe, especially if used as a mouthwash.
Largely, turmeric is safe for use in pregnant and breastfeeding women except in high medicinal amounts.
People with blood clotting disorders may experience worsened symptoms after bruises or injuries. This is due to the effect of turmeric in slowing down the blood clotting process.
Turmeric could reduce testosterone levels and reduce the velocity of sperm movement. This is a serious cause for concern in checking infertility in men.
If you have liver dysfunction, you might want to stay away from using turmeric. Turmeric might add to damage of the liver. [4]
Reference：
[1] https://www.webmd.com/vitamins/ai/ingredientmono-662/turmeric
[2] https://www.everydayhealth.com/diet-nutrition/diet/turmeric-curcumin-benefits-side-effects-types-more/
[3] https://examine.com/supplements/curcumin/
[4] https://www.webmd.com/vitamins/ai/ingredientmono-662/turmeric