Each tablet contains: Colloidal Hydrophilic Silica gel 20 mg • Horsetail extract (containing 15 mg [2.5%] silica) 600 mg. Other Ingredients: Cellulose, Acacia Gum, Stearic Acid.
Brand name products often contain multiple ingredients. To read detailed information about each ingredient, click on the link for the individual ingredient shown above.
Below is general information about the effectiveness of the known ingredients contained in the product KAL Silica Plus. Some ingredients may not be listed. This information does NOT represent a recommendation for or a test of this specific product as a whole.
INSUFFICIENT RELIABLE EVIDENCE to RATE
INSUFFICIENT RELIABLE EVIDENCE to RATE
Below is general information about the safety of the known ingredients contained in the product KAL Silica Plus. Some ingredients may not be listed. This information does NOT represent a recommendation for or a test of this specific product as a whole.
POSSIBLY UNSAFE ...when horsetail products containing thiaminase are used orally, long-term. Thiaminase is an enzyme that destroys thiamine, which could theoretically lead to thiamine deficiency. In Canada, horsetail products are required to be thiaminase-free (105301).
PREGNANCY AND LACTATION:
Insufficient reliable information available; avoid using.
LIKELY SAFE ...when used orally and appropriately in amounts commonly found in foods (7135,10470,92135). It is estimated that the average dietary intake of silicon is 20-50 mg daily (110029); however, there is currently no established recommended dietary allowance or tolerable upper intake level for silicon (7135,92136,95009,110029).
PREGNANCY AND LACTATION: LIKELY SAFE
when used orally in amounts commonly found in foods (7135,10470).
It is estimated that the average dietary intake of silicon is 20-50 mg daily (110029). There is insufficient reliable information available about the safety of silicon when used in larger, medicinal amounts; avoid using.
Below is general information about the interactions of the known ingredients contained in the product KAL Silica Plus. Some ingredients may not be listed. This information does NOT represent a recommendation for or a test of this specific product as a whole.
Theoretically, taking horsetail with antidiabetes drugs might increase the risk of hypoglycemia.
 Details
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Theoretically, taking horsetail with diuretic drugs might increase potassium loss and the risk of hypokalemia.
Details
Laboratory research shows that various species of horsetail have diuretic properties (13574,13575). Due to its diuretic effects, there has been concern that taking horsetail along with potassium-depleting diuretics might increase the risk for hypokalemia. However, pharmacokinetic research in humans shows that taking horsetail 900 mg daily for 4 days does not affect urinary excretion of electrolytes, including potassium and sodium, despite having a diuretic effect similar to taking hydrochlorothiazide 25 mg daily (92288). It is unclear if taking horsetail for a longer duration would affect electrolyte levels. Until more is known, use with caution.
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Theoretically, horsetail might decrease the levels and clinical effects of efavirenz.
Details
In two case reports, patients were found to have detectable viral loads when taking horsetail-containing supplements along with an antiretroviral regimen that included efavirenz. In one case, the antiretroviral regimen included zidovudine, lamivudine, and efavirenz; in the other case, the regimen consisted of emtricitabine, tenofovir disoproxil fumarate, and efavirenz. One month after discontinuing horsetail, the viral loads became undetectable in both cases. The exact mechanism of this interaction is unknown (97573). It is also unclear if this interaction is specific to efavirenz or if it is related to various components of antiretroviral therapy.
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Theoretically, horsetail might increase the levels and adverse effects of lithium.
Details
Animal research suggests that horsetail has diuretic properties (13574). Theoretically, due to these potential diuretic effects, horsetail might reduce excretion and increase levels of lithium. The dose of lithium might need to be decreased.
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Theoretically, horsetail might decrease the levels and clinical effects of NRTIs.
Details
In two case reports, patients were found to have detectable viral loads when taking horsetail-containing supplements along with an antiretroviral therapy. In one case, the antiretroviral regimen included zidovudine, lamivudine, and efavirenz; in the other case, the regimen consisted of emtricitabine, tenofovir disoproxil fumarate, and efavirenz. One month after discontinuing the supplement, the viral loads became undetectable in both cases. The exact mechanism of these interactions is unknown (97573). It is also unclear if these interactions are specific to NRTIs or if they are related to various components of antiretroviral therapy.
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Below is general information about the adverse effects of the known ingredients contained in the product KAL Silica Plus. Some ingredients may not be listed. This information does NOT represent a recommendation for or a test of this specific product as a whole.
General
...There is limited clinical research evaluating the safety of horsetail.
Most Common Adverse Effects:
Orally: Abdominal distension, increased bowel movements, and nausea.
Dermatologic ...In one case report, a patient developed seborrheic dermatitis after topical application of horsetail, requiring treatment with local epinephrine and oral antihistamines. The nicotine component of horsetail was determined to be the likely cause of this reaction (13563).
Gastrointestinal ...Orally, horsetail has been associated with mild gastrointestinal side effects including abdominal distension, increased frequency of bowel movements, and nausea (55576). Orally, chronic consumption of horsetail infusion has been associated with acute pancreatitis. In a case report, a 56-year-old female presenting with recurrent mild acute pancreatitis every 6-7 months, previously thought to be drug-induced, discontinued ingesting horsetail infusions. The patient had a history of bilateral adrenal gland removal and was being treated for hypertension, dyslipidemia, and hormone replacement, and then self-medicated with horsetail infusions. After discontinuing horsetail infusions, there were no further recurrences of pancreatitis during a 14-month follow-up (97574).
Hepatic ...In one case report, a patient with asymptomatic hepatitis B developed symptomatic liver failure following consumption of boiled horsetail juice 500 mL daily for 2 weeks. Liver enzymes returned to normal following discontinuation of the juice (92291). It is not known if the horsetail juice was contaminated or mixed with other ingredients.
Immunologic ...Horsetail has been associated with cross-allergenicity with carrots (13577).
Renal ...There are at least 4 case reports of hyponatremia thought to be at least partially associated with horsetail consumption. In one case report, an elderly patient who had taken oral horsetail 15 mg daily for 10 years presented with hyponatremia and syndrome of inappropriate secretion of antidiuretic hormone (SIADH) secondary to reduced oral intake and nausea for the previous 2 days. Horsetail was thought to be a contributing factor. The patient's symptoms resolved after 5 days of treatment with oral sodium chloride and fluid restriction (108851).
Other ...Crude horsetail contains thiaminase, which can cause thiamine deficiency with prolonged consumption. Canadian Equisetum arvense products are required to be certified as free from thiaminase-like activity (55579,105301). In one case report, the development of autism in a child exposed to both horsetail and alcohol during pregnancy was thought to be caused by thiamine deficiency attributed to this combination (92292). However, it is not known if other genetic or environmental factors were involved in the development of this condition in utero.
General
...Orally, silicon in the amounts found in food and water is not associated with adverse effects.
Serious Adverse Effects (Rare):
Inhaled: Crystalline silicon dioxide in the form of quartz dust found in industrial and occupational settings is associated with an increased risk of diseases such as silicosis, tuberculosis, chronic bronchitis, chronic obstructive pulmonary disease (COPD), lung cancer, glomerulonephritis, vasculitis, and rheumatoid arthritis.
Cardiovascular ...Case control studies have shown that occupational exposure to silicon dioxide-containing compounds may cause vasculitis (75114). Patients with occupational pulmonary silicosis may develop microscopic polyangiitis (inflammation of the blood vessels in the nose, sinuses, throat, lungs, and kidneys, also known as Wegener's granulomatosis).
Dermatologic ...Occupational silica exposure may be a risk factor for scleroderma, particularly in males (75099).
Genitourinary
...Limited reports in humans indicate that long-term use of large amounts of antacids containing magnesium trisilicate may be associated with urolithiasis and silicon-containing stones (11760,11861,75075,75103).
However, fewer than 30 cases associated with antacids containing silicates have been reported, despite these products being commercially available since the 1930s. Although exceptionally rare, silicon dioxide kidney stones can also occur without magnesium trisilicate ingestion (11556). Their formation is caused by an acidic urinary pH. In at least one case, urine alkalinization resulted in resolution of the symptoms (75075).
Case-control studies have shown that occupational exposure to silicon dioxide is related to antineutrophil cytoplasmic antibody (ANCA)-associated glomerulonephritis (75114). High silicon levels in patients undergoing chronic hemodialysis have been associated with nephropathy (75089).
Hepatic ...High silicon levels in patients undergoing chronic hemodialysis have been associated with liver disease (75089).
Musculoskeletal ...High silicon levels in patients undergoing chronic hemodialysis have been associated with bone disease (75089). A meta-analysis suggests that the risk of rheumatoid arthritis is elevated with occupational exposure to silicon dioxide (75078).
Neurologic/CNS ...High silicon levels in patients undergoing chronic hemodialysis have been associated with neuropathy (75089).
Pulmonary/Respiratory ...Occupational exposure to crystalline silicon dioxide dust is associated with an increased risk of pulmonary diseases such as silicosis, tuberculosis, chronic bronchitis, chronic obstructive pulmonary disease (COPD), and lung cancer (75076,75081,75084,75114). Patients with occupational pulmonary silicosis may develop microscopic polyangiitis (inflammation of the blood vessels in the nose, sinuses, throat, lungs, and kidneys, also known as Wegener's granulomatosis). Meta-analyses suggest that occupational exposure to silicon dioxide increases the risk of lung cancer (75085,75095,75115). An analysis of 19 studies shows that lung cancer risk is approximately 2 times higher for those with silicosis (75115). It is not clear whether silicon dioxide is carcinogenic in the absence of silicosis (75083).
