12 Serious Side Effects of Turmeric

Let’s have a look at the possible side effects turmeric can have.

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By Cookist

Turmeric has recently been hailed as a superfood, but did you know that it can have some serious side effects?

This, of course, applies to taking large amounts of turmeric as a supplement, not cooking the occasional dish with it – that’s generally considered perfectly safe (and tasty!)

Let’s have a look at the possible side effects turmeric can have:

1. Risk of Excessive Bleeding


Turmeric has been found to slow down blood clotting, and this can increase the risk of bruising and bleeding in those who have bleeding disorders.

Turmeric could also interact with certain medications to cause excessive bleeding, so if you are on any medications for bleeding disorders or have bleeding disorders, stop taking turmeric.

2. Gastrointestinal Problems


Having turmeric cooked in curry hasn’t been linked to stomach issues, but high doses of turmeric over an extended period of time has been found to cause gastrointestinal problems.

Adults who consume more than the recommended amount of turmeric supplement (400 mg to 3 grams) can suffer from stomach problems – make sure you only take the recommended amount. Turmeric may also cause heartburn and indigestion.

3. Increased Risk of Gallstones and Gallbladder Issues


Turmeric contains a significant amount of oxalate, a substance that can increase the risk of developing gallstones. According to a study in the American Journal of Clinical Nutrition, urine showed increased levels of oxalate when the subjects had taken turmeric, compared to the control group.

Increased gallbladder contractions were also reported when turmeric supplements of 20-40 mg were taken. If you have gallbladder issues, it’s best to avoid turmeric supplements.

4. Lowers Blood Pressure


Blood pressure that is too low can be dangerous, and high doses of turmeric can lower blood pressure. If you take medications to lower your blood pressure, you need to be careful while taking turmeric.

5. Increased Risk of Kidney Stones


As with gallstones, too much turmeric can increase the risk of developing kidney stones because of the oxalates in it. These oxalates can bind to calcium to form calcium oxalate, which is insoluble, and mainly responsible for kidney stones.

In one study, consuming turmeric led to a higher urinary oxalate excretion compared to cinnamon, so it’s wise to avoid turmeric if you have kidney problems.

6. Pregnant and Breastfeeding Women


Turmeric is safe for pregnant women to eat as a spice in food, but turmeric supplements should be avoided during pregnancy.

There is not much research available at the moment on the possible effects of turmeric on pregnant and breastfeeding women, and it’s not known if the active compounds will pass through breast milk.

7. Nausea and Diarrhea


Nausea and diarrhea are two symptoms associated with turmeric supplements, and this is because the curcumin in turmeric can cause irritation in the gastrointestinal tract.

Even low doses can cause nausea in some people, so if you notice any symptoms after taking turmeric, stop using it.

8. Don’t Use with Blood Thinning Medication


The curcumin in turmeric has been shown to reduce blood platelet function, and should be avoided by those taking blood thinning medication such as Warfarin or Coumadin.

9. May Cause Allergic Reactions


Curcumin can cause contact allergy, and some people have reported contact dermatitis and urticaria (hives) due to skin contact with turmeric. As turmeric is part of the same family as ginger, you are more likely to have a reaction if you’re allergic to ginger. If you are allergic to yellow food coloring, you may also be allergic to turmeric.

10. Could be a Factor in Infertility


If men take large amounts of turmeric supplements, it could have an effect on their testosterone levels and decrease sperm movement, which could lead to infertility.

11. May Cause Iron Deficiency


Studies have shown that some compounds in turmeric bind to iron. This could lead to a decrease in the body’s ability to absorb iron from food, which could lead to iron deficiency.

12. Avoid if You Are Having Surgery


If you are due to have an operation, avoid turmeric for one to two weeks before surgery. This is because of turmeric’s tendency to inhibit blood clotting.

Interactions with Herbs and Medicines

Turmeric might interact with the following herbs:

Black pepper Ginger

And these medications:

Blood-thinning medication like warfarin, clopidogrel, aspirin etc. Indigestion remedies such as cimetidine, famotidine, ranitidine, esomeprazole, omeprazole, and lansoprazole Diabetes medications

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