Amaranth

<h3> Absolute Contraindications of Amaranth </h3> <h4> Known severe allergy / prior anaphylaxis to amaranth (seeds or flour) </h4> <ul> <li> Relevant Emoji: 🚫🤧 <li> Recommendation: Avoid any form of amaranth (seeds, flour, or leaves) and carry emergency medication (epinephrine) if prescribed; see an allergist for testing and an action plan. <li> Reasoning: Documented cases show immediate IgE-mediated reactions after eating amaranth seed flour; sensitized individuals can develop oropharyngeal itching, facial swelling, airway compromise and anaphylaxis within minutes of ingestion. <li> Scientific_Study_Title: First case report of anaphylaxis caused by Rajgira seed flour (Amaranthus paniculatus) from India: a clinico-immunologic evaluation. <li> Scientific_Study_Authors: Ramkrashan Kasera, P V Niphadkar, Aditya Saran, Chandni Mathur, A B Singh <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/23517398/ <li> Scientific_Study_Excerpt: <p>In this clinical case report a 60-year-old woman developed classic IgE-mediated anaphylaxis within minutes of consuming roasted Rajgira (Amaranthus paniculatus) seed flour. Clinical evaluation included positive skin prick testing and elevated amaranth-specific IgE; the investigators identified three IgE-binding protein fractions in roasted seed extract that likely acted as allergens. The authors concluded that although food allergy to amaranth had not been widely reported previously, amaranth seeds can trigger severe immediate hypersensitivity in sensitized individuals and must be treated like any other food allergen with avoidance and emergency preparedness.</p> </li> </ul> <h4> High LDL / established cardiovascular disease - concentrated amaranth oil supplement use [In simple terms: people with high "bad" cholesterol or coronary disease should NOT take amaranth oil supplements without supervision]</h4> <ul> <li> Relevant Emoji: 🚫❤️ <li> Recommendation: Do not use concentrated amaranth oil supplements (therapeutic-dose oil) if you have uncontrolled high LDL or active coronary disease unless a cardiologist/nutritionist supervises; prefer whole-food forms (cooked grain) and discuss monitoring. <li> Reasoning: A randomized, double-blind human study found that daily amaranth oil supplementation raised total and LDL cholesterol compared with rapeseed oil in overweight/obese subjects - so concentrated oil preparations can worsen lipid profiles in some people. <li> Scientific_Study_Title: Amaranth Oil Increases Total and LDL Cholesterol Levels without Influencing Early Markers of Atherosclerosis in an Overweight and Obese Population: A Randomized Double-Blind Cross-Over Study. <li> Scientific_Study_Authors: M. Krajčovičová-Kudláčková, et al. (study authors as listed on PubMed). <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/31888234/ <li> Scientific_Study_Excerpt: <p>In this controlled cross-over trial overweight and obese adults consumed 20 mL/day of amaranth oil versus rapeseed oil during study arms. After supplementation the amaranth oil arm showed a statistically significant increase in total cholesterol and LDL-cholesterol compared with the rapeseed oil arm (mean ΔTC and ΔLDL higher in the amaranth group). Early atherosclerosis markers did not change over the short intervention, but the lipid rise suggests that concentrated amaranth oil may unfavourably alter blood lipids in certain populations. The authors warn that oil supplements are not the same as whole-grain dietary use and should be prescribed cautiously in patients with cardiovascular risk.</p> </li> </ul> <h4> History of kidney stones with oxalate stones - high-leaf consumption [In simple terms: people prone to oxalate kidney stones should avoid large amounts of amaranth leaves]</h4> <ul> <li> Relevant Emoji: 🚫🪨 <li> Recommendation: Avoid heavy consumption of raw or dried amaranth leaves if you have a history of calcium-oxalate kidney stones; discuss alternatives with your nephrologist and limit portion size or prefer seeds (grain) instead of large amounts of leaves. <li> Reasoning: Amaranth leaves accumulate calcium-oxalate crystals and contain appreciable oxalate levels; high intake of oxalate-rich greens can increase urinary oxalate load and stone risk in susceptible people. <li> Scientific_Study_Title: Amaranth calcium oxalate crystals are associated with chloroplast structures and proteins. <li> Scientific_Study_Authors: Ivan Takeshi Cerritos-Castro, Araceli Patrón-Soberano, Esaú Bojórquez-Velázquez, Jorge Luis González-Escobar, Erandi Vargas-Ortiz, Emilio Muñoz-Sandoval, Ana Paulina Barba de la Rosa <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/36250444/ <li> Scientific_Study_Excerpt: <p>Microscopy and biochemical analysis demonstrated that amaranth leaves form and store significant calcium-oxalate (CaOx) crystals within specialized leaf cells, and proteins associated with chloroplast degradation were tightly bound to these crystals. The work characterizes the abundance and cellular localization of CaOx in Amaranthus leaf tissues and discusses how crystal accumulation varies by tissue and plant stage. From a human health perspective, these findings support earlier compositional analyses showing that some amaranth leaf varieties have high oxalate content; therefore, consuming large quantities of leaves can increase dietary oxalate intake and may be contraindicated in individuals predisposed to CaOx kidney stones.</p> </li> </ul> <h3> Relative Contraindications of Amaranth </h3> <h4> Concomitant use with warfarin / vitamin K-antagonists (large amounts of leafy amaranth)</h4> <ul> <li> Relevant Emoji: ⚖️🩸 <li> Recommendation: If you take warfarin or similar anticoagulants, keep your intake of amaranth leaves consistent and discuss amounts with your clinician; avoid sudden large increases in leafy amaranth (especially fresh leaves) and consider monitoring INR more closely when changing intake. <li> Reasoning: Amaranth leaves can contain substantial vitamin K and may alter warfarin effect if consumed in large or inconsistent amounts; controlled experimental work in animals suggests small portions under 100 g/day may not change warfarin pharmacodynamics, but caution and monitoring are prudent. <li> Scientific_Study_Title: The Effect of Spinach (Amaranthus hybridus) on the Pharmacokinetic and Pharmacodynamic Profile of Warfarin in New Zealand White Rabbits. <li> Scientific_Study_Authors: Norisca Aliza Putriana, Taofik Rusdiana, Tina Rostinawati, Irma Rahayu Latarissa <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/39991637/ <li> Scientific_Study_Excerpt: <p>In a controlled rabbit study researchers administered warfarin with two doses of Amaranthus hybridus (spinach) and measured warfarin plasma concentrations and PT-INR. While AUC and plasma concentrations were numerically higher in the vegetable groups, differences were not statistically significant, and no pharmacodynamic interaction was observed under the study conditions. The authors concluded that moderate, consistent portions (they referenced a 100 g/day threshold) are unlikely to produce clinically meaningful warfarin interaction in this animal model, but they emphasize clinical caution in humans and recommend consistent dietary patterns and INR monitoring when leafy vegetable intake changes.</p> </li> </ul> <h4> Concurrent use with statins / HMG-CoA reductase inhibitors (potential additive effects on cholesterol metabolism)</h4> <ul> <li> Relevant Emoji: ⚠️💊 <li> Recommendation: If you are taking statins, discuss adding amaranth supplements or high-dose oil with your prescriber - monitor lipid panels if amaranth is used therapeutically since amaranth components affect cholesterol pathways. <li> Reasoning: Amaranth squalene and unsaponifiables can alter cholesterol synthesis and fecal sterol excretion; although this can lower cholesterol in some animal studies, the effect intersects with statin targets (HMG-CoA reductase), so combined effects are plausible and unpredictable without monitoring. <li> Scientific_Study_Title: Amaranth squalene reduces serum and liver lipid levels in rats fed a cholesterol diet. <li> Scientific_Study_Authors: Z. Liu, M.C. Kitts, et al. (authors as listed in PubMed record) <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/15058737/ <li> Scientific_Study_Excerpt: <p>In rat experiments, dietary amaranth grain, oil and isolated squalene reduced serum and hepatic cholesterol and triglycerides, increased fecal cholesterol and bile-acid excretion, and produced modest inhibition of HMG-CoA reductase activity. The authors proposed that plant-derived squalene from amaranth can act by enhancing sterol excretion and slightly inhibiting hepatic cholesterol synthesis. While the animal data suggest hypocholesterolemic potential, human responses vary by preparation and dose; because statins target the same hepatic pathway, additive or modifying effects are biologically plausible and merit clinical monitoring rather than blind co-administration.</p> </li> </ul> <h4> Concurrent use with antihypertensive medication (theoretical potentiation) </h4> <ul> <li> Relevant Emoji: ⚠️🩺 <li> Recommendation: If you take antihypertensive drugs, inform your clinician before using concentrated amaranth protein extracts or supplements; monitor blood pressure when starting or stopping such products. <li> Reasoning: Animal studies show amaranth protein isolates and peptides can lower blood pressure; when combined with blood-pressure medications this could modestly amplify hypotensive effects requiring dose or monitoring adjustments. <li> Scientific_Study_Title: Effects of the Dietary Addition of Amaranth (Amaranthus mantegazzianus) Protein Isolate on Antioxidant Status, Lipid Profiles and Blood Pressure of Rats. <li> Scientific_Study_Authors: Czerwiński J, Bartnikowska E, Leontowicz H, Lange E, Leontowicz M, Katrich E, Trakhtenberg S, Gorinstein S (as listed in PubMed) <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/26497504/ <li> Scientific_Study_Excerpt: <p>In a controlled 28-day rodent feeding study, diets supplemented with amaranth protein isolate produced a significant reduction in systolic blood pressure (about 18% in the intervention groups) alongside improved antioxidant markers and favorable changes in lipid metabolism. The authors linked these effects to bioactive peptides and antioxidant constituents in the protein fraction. Translating these findings to humans suggests a potential for modest blood-pressure lowering that could interact with prescription antihypertensives; therefore, clinical monitoring is advisable when combining therapies.</p> </li> </ul>