12 Serious Side Effects of Turmeric That Have Been Carefully Hidden From You
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Turmeric (Curcuma longa) is a vibrant golden-orange spice widely used in cooking, especially in Indian cuisine. Its active compound, curcumin (which can make up about 3% of turmeric by weight), is renowned for its anti-inflammatory (used in Ayurvedic and Chinese medicine) and antioxidant properties.
However, it’s essential to remember that turmeric’s absorption is enhanced when paired with black pepper, thanks to piperine, which can increase the absorption rate by up to 2,000%. But there is a dark side to this yellow spice. These are the 12 serious side effects of turmeric that have been hidden from you (but not anymore).
Digestive Issues
A study published in the National Library of Medicine reveals that GI symptoms (diarrhea, abdominal pain, flatulence, yellow stools, dyspepsia, nausea, vomiting, GI distress, and constipation) were reported among individuals who took excessive amounts of curcumin, the active compound in turmeric, especially in supplement form.
For those with pre-existing conditions like irritable bowel syndrome (IBS) or acid reflux, turmeric can exacerbate symptoms due to its potential to increase gastric secretions.
Risk of Kidney Stones
The culprit lies in oxalates—compounds found in turmeric that can bind with calcium in your body, forming kidney stones when consumed in excess. The National Institute of Health indicates that around 80% of kidney stones are made up of calcium oxalate mixed with calcium phosphate.
About 1 in 11 people will suffer a kidney stone in their lifetime (men are impacted at twice the rate of women). Always consult with your healthcare provider, especially if you have a history of kidney stones or other related health issues.
Blood Thinning
The active compound in turmeric, curcumin, has been shown to inhibit platelet aggregation. This means it can affect blood clotting, which can pose serious risks, especially for those already on anticoagulant medications or those with bleeding disorders.
More than 2 million people take blood thinners daily. Ask your healthcare provider before introducing turmeric or curcumin supplements into your routine, especially if you’re on blood thinners like warfarin or aspirin.
Allergic Reactions
Allergic reactions to turmeric are rare but can be severe for sensitive people. Symptoms may range from mild skin irritation or rashes to more severe responses, such as difficulty breathing or anaphylaxis in extreme cases.
Curcumin, the active compound in turmeric, can trigger immune responses in some individuals. If you experience these reactions, stop using it immediately and seek medical advice.
Iron Deficiency
This is particularly concerning given that iron is essential for producing hemoglobin, the protein in red blood cells that carries oxygen throughout the body. Turmeric inhibits iron absorption by 20%-90% in humans.
The stoichiometric properties of turmeric suggest that it may bind to nearly all absorbable iron, potentially leading to iron deficiency, especially when consumed in large quantities or alongside foods rich in calcium and oxalates. The World Health Organization (WHO) states that Anemia affects over 1.6 billion people (approximately 25% of the global population).
Interactions with Medications
Research shows that curcumin can enhance or inhibit the effectiveness of various medications, particularly those related to blood thinners, diabetes management, and acid reflux treatments. Curcumin can potentiate the effects of anticoagulants, such as warfarin, increasing the risk of bleeding.
For folks managing diabetes, turmeric might cause a dip in blood sugar levels, leading to hypoglycemia when combined with insulin or other glucose-lowering drugs. Other side effects include shakiness, blurred vision, delirium, and anxiety.
Gallbladder Issues
Curcumin can cause the gallbladder to contract more vigorously, which may pose problems for those already facing gallbladder disorders, such as gallstones or biliary colic. The National Institute of Health notes that about 10-15% of the population (almost 25 million ) suffers from gallstones.
Consuming turmeric could aggravate their condition and lead to painful complications for these individuals. Moreover, an overconsumption of turmeric has been linked to excessive bile production, further stressing the gallbladder.
Risk for Pregnant Women
Pregnant women are often advised to limit their turmeric intake because it can stimulate the uterus, potentially leading to premature contractions and complications. Additionally, research suggests that excessive turmeric may interfere with fetal development.
Curcumin can cross the placenta, raising potential risks for the baby’s developing brain. The NCCIH recommends that pregnant women avoid turmeric supplements.
Liver Damage
According to various studies, excessive consumption of turmeric—especially in supplement form—can lead to hepatotoxicity or liver injury. This is primarily attributed to curcumin, the active compound in turmeric.
In high doses, curcumin can disrupt liver enzymes—those little workers in your body that help break down and detoxify substances. A case report published in the BMJ Case Reports highlighted an instance of turmeric-induced hepatitis.
Skin Reactions
Thilak et al. found that contact dermatitis attributed to turmeric can affect up to 4% of those who use it on their skin (topical forms). These reactions can manifest as rashes, redness, or even a burning sensation on the skin.
Although celebrated for its anti-inflammatory properties, curcumin can trigger sensitivities in specific individuals. Additionally, the bright yellow pigment of turmeric can stain the skin, and prolonged exposure might lead to a yellowish tint that can be tough to remove.
Excessive Bleeding During and After Surgery
Turmeric contains curcumin, a compound that inhibits platelet aggregation, preventing blood from clotting effectively. This effect can be particularly concerning for those preparing for surgical procedures, as it can lead to prolonged bleeding, increased recovery times, and even complications during the surgery itself.
Curcumin was shown to have antiplatelet properties. It is advisable to stop taking turmeric supplements at least two weeks before any surgical procedure to minimize bleeding risks.
Infertility in Men
Studies suggest that excessive consumption of turmeric can disrupt testosterone levels, which is vital for male fertility. Curcumin decreases sperm motility, sperm capacitation, and acrosome reaction. At high concentrations, its ability to block sperm motility and function lasts for 5-15 minutes.
Approximately 12% to 15% of couples experience infertility, and lifestyle choices play a significant role. By compromising testosterone production and sperm quality, turmeric can inadvertently become a stumbling block.
Disclaimer – This list is solely the author’s opinion based on research and publicly available information.
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