Hello, and thank you for your question!
Currently, there is no daily recommended dose of (pickled or raw) turmeric. However, there is a daily recommendation for curcumin, an active plant compound in turmeric that has many potential health benefits but can cause negative side effects if taken in high doses.1 The daily recommendation for curcumin is 0-3mg/kg body weight (or nearly 1.4mg/lb body weight; 1 kg = 2.2 lbs).1
For example, a person who weighs 60kg (or 132lbs) can safely consume 60-100mg of curcumin per day, which equals to 2 to 2.5 teaspoons of ground turmeric (depending on the quality and source of the spice).2
Turmeric can potentially be more harmful in supplement or powder forms but generally safe in amounts typically eaten in food. I suggest to use and consume turmeric in small amounts (as you would for other spices) and listen to your body. You may want to reduce the amount you use or avoid it if you notice negative side effects, such as nausea or stomach aches.
I hope the math was not too confusing. Hope this helps!
Anna, RD and Joshua, RD
NOTE: If you are considering taking a turmeric supplement or powder, I suggest talking to your doctor or a qualified healthcare professional before. Many nutritional supplements on the market are not regulated for safety and may be contaminated or cause harmful side effects, especially in high doses.
Hewlings, Susan J, and Douglas S Kalman. “Curcumin: A Review of Its' Effects on Human Health.” Foods (Basel, Switzerland) vol. 6,10 92. 22 Oct. 2017, doi:10.3390/foods6100092
Amalraj, Augustine et al. “Biological activities of curcuminoids, other biomolecules from turmeric and their derivatives - A review.” Journal of traditional and complementary medicine vol. 7,2 205-233. 15 Jun. 2016, doi:10.1016/j.jtcme.2016.05.005