1. Ephedra
Ephedra, commonly used for weight loss and energy enhancement, contains ephedrine alkaloids that can elevate blood pressure and increase the risk of kidney damage, especially in individuals with pre-existing kidney conditions or hypertension.
Dr. Geiga warns, "Ephedra can be particularly harmful to those with existing kidney issues."
It can also harm your heart, among other risks. For safer energy support, consider guarana, or consult with a healthcare provider for personalized recommendations.
2. Cascara Sagrada
Often used as a laxative, Cascara sagrada can lead to health issues with prolonged or excessive use, straining the kidneys over time.
Dr. Geiga notes, "Excessive use of Cascara sagrada can compromise kidney health due to dehydration and electrolyte imbalances."
To support regularity without compromising kidney health, choose gentler laxatives like psyllium husk or incorporate fiber-rich foods into your diet.
3. Licorice Root
Licorice root, if consumed in large amounts or over extended periods, can cause potassium depletion and elevate blood pressure. This can potentially lead to kidney damage or worsening existing kidney conditions. "Licorice root can be harmful to kidney health due to its effect on potassium levels and blood pressure," warns Dr. Geiga. For digestive health, consider alternatives like chamomile or fennel tea, which can soothe the stomach without the risks associated with licorice root.
4. Comfrey
Comfrey contains pyrrolizidine alkaloids that are toxic to the liver and can also harm the kidneys. Dr. Geiga explains, "Prolonged use or high doses of comfrey can lead to liver damage and kidney toxicity." Instead of comfrey, explore alternatives like chamomile or calendula, which offer soothing properties without the risk of liver or kidney harm.
5. Aristolochic Acid-Containing Herbs
Certain herbs, such as Aristolochia species (e.g., birthwort), contain aristolochic acid, a compound known for its nephrotoxic (kidney-damaging) properties. Dr. Geiga states, "Aristolochic acid can cause severe kidney damage, including renal fibrosis and even kidney failure." To avoid these risks, steer clear of any herbs containing aristolochic acid. Instead, opt for safer alternatives like turmeric, ginger, or parsley, which offer similar benefits without posing a threat to your kidneys.