# Selenium Nicotinate **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/selenium-nicotinate **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-04-04 **Evidence Score:** 2 / 10 **Category:** Mineral **Also Known As:** Selenium nicotinic acid ester, Organoselenium nicotinate, Nicotinic acid selenium ester, Se-nicotinate, Selenium niacin complex ## Overview Selenium nicotinate is a compound combining selenium with nicotinic acid (niacin), theorized to enhance selenium bioavailability through organic chelation. No human clinical trials have established health benefits specific to this form, distinguishing it from better-studied selenium compounds like selenomethionine or sodium selenite. ## Health Benefits • No human health benefits established - no clinical trials, RCTs, or meta-analyses were identified in the research • Microbial enzyme studies show selenium acts as a cofactor in nicotinic acid hydroxylase, but this is bacterial research only • No evidence quality available due to absence of human studies • No documented therapeutic effects in humans • Safety and efficacy remain unestablished for human supplementation ## Mechanism of Action Selenium nicotinate is hypothesized to deliver selenium as a cofactor for selenoproteins, including [glutathione](/ingredients/condition/detox) peroxidases (GPx1-4) and thioredoxin reductase (TrxR1), which neutralize [reactive oxygen species](/ingredients/condition/antioxidant) via reduction of hydrogen peroxide and lipid hydroperoxides. The nicotinate moiety may theoretically improve intestinal absorption compared to inorganic selenite by facilitating transport through organic acid pathways, though this has not been confirmed in human pharmacokinetic studies. In bacterial systems, selenium acts as a cofactor in nicotinic acid hydroxylase, a molybdenum-containing enzyme, but this microbial mechanism has no established human analogue. ## Clinical Summary No human clinical trials, randomized controlled trials, or meta-analyses have been conducted specifically on selenium nicotinate as of the available research base. General selenium research in humans involves forms such as selenomethionine and sodium selenite, studied in contexts including cancer prevention (SELECT trial, n=35,533) and [thyroid function](/ingredients/condition/hormonal), with mixed or null results. The absence of human data for selenium nicotinate makes it impossible to assign an evidence quality rating or recommend specific therapeutic dosages. Any extrapolation from general selenium research to this specific compound is speculative without comparative bioavailability studies. ## Nutritional Profile Selenium Nicotinate is a coordination compound combining selenium (Se) with nicotinic acid (niacin/vitamin B3). As a mineral-organic complex, it is not a food source and therefore has no macronutrient content (0g protein, 0g fat, 0g carbohydrate). The compound theoretically delivers two micronutrient components upon dissociation: (1) Selenium — an essential trace mineral; typical supplemental doses in selenium compounds range from 50–200 mcg elemental Se per serving, though no standardized dosing exists specifically for selenium nicotinate; and (2) Nicotinic acid (niacin) — a B-vitamin with an adult RDA of 14–16 mg NE (niacin equivalents). The molar ratio of selenium to nicotinic acid in the complex is not publicly standardized in available literature. Selenium in organic-bound forms (e.g., selenomethionine) generally demonstrates higher bioavailability (~90%) compared to inorganic forms (~50%), but the specific bioavailability of selenium nicotinate in humans has not been studied or documented. The nicotinate moiety is structurally identical to free nicotinic acid, suggesting potential absorption via established niacin transport pathways (sodium-dependent carriers in the intestine), though this remains unconfirmed for this specific chelate. No fiber, [antioxidant](/ingredients/condition/antioxidant) ORAC values, phytochemical content, or caloric density apply. The compound is primarily characterized in microbial biochemistry as a selenium-containing cofactor in bacterial nicotinic acid hydroxylase enzymes, not as a human nutritional substrate. ## Dosage & Preparation No clinically studied dosage ranges for selenium nicotinate are available as no human trials exist. General selenium supplementation data exists but lacks nicotinate-specific standardization or dosing guidance. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Selenium toxicity (selenosis) can occur at chronic intakes above 400 mcg/day in adults, causing hair loss, nail brittleness, gastrointestinal disturbance, and neurological symptoms regardless of selenium form. Selenium compounds may interact with anticoagulants such as warfarin, potentially altering bleeding risk, and may reduce the efficacy of cisplatin-based chemotherapy by modulating [oxidative stress](/ingredients/condition/antioxidant) pathways. Selenium supplementation is generally approached cautiously during pregnancy, with the Tolerable Upper Intake Level set at 400 mcg/day for adults by the Institute of Medicine, and the nicotinate component introduces additional theoretical niacin-related flushing risk at high doses. Individuals with autoimmune [thyroid](/ingredients/condition/hormonal) disease should consult a physician before supplementing, as selenium dose-dependently affects thyroid peroxidase antibody levels. ## Scientific Research No human clinical trials, RCTs, or meta-analyses specifically on selenium nicotinate were identified. Research is limited to microbial enzymology studies, such as investigations of nicotinic acid hydroxylase from Clostridium barkeri (PMID: 7181513), which are in vitro or bacterial studies rather than human trials. ## Historical & Cultural Context No evidence of selenium nicotinate in traditional medicine systems was found, as it appears to be a modern synthetic compound without historical context. The compound lacks any documented traditional uses, unlike some naturally occurring minerals used in herbal medicine systems. ## Synergistic Combinations No synergistic combinations established due to lack of human studies ## Frequently Asked Questions ### What is selenium nicotinate and how is it different from other selenium supplements? Selenium nicotinate is an organically chelated form of selenium bound to nicotinic acid (vitamin B3/niacin), distinguishing it from inorganic forms like sodium selenite and amino acid-bound forms like selenomethionine. Selenomethionine is the most bioavailable and extensively researched form in humans, with absorption rates near 90%, while selenium nicotinate has no published human pharmacokinetic data to confirm whether its organic structure confers similar or superior absorption. ### Are there any clinical trials proving selenium nicotinate benefits? No human clinical trials, randomized controlled trials, or meta-analyses have been identified that specifically examine selenium nicotinate for any health outcome. All available research involving selenium nicotinate is limited to microbial enzyme studies, specifically the role of selenium as a cofactor in bacterial nicotinic acid hydroxylase, which cannot be extrapolated to human supplementation benefits. ### What is the safe dosage range for selenium nicotinate? No human dose-response studies exist for selenium nicotinate specifically, but general selenium safety guidelines apply: the Recommended Dietary Allowance for adults is 55 mcg/day, and the Tolerable Upper Intake Level established by the Institute of Medicine is 400 mcg/day. Exceeding 400 mcg/day chronically risks selenosis, characterized by garlic-breath odor from dimethyl selenide exhalation, alopecia, and peripheral neuropathy. ### Can selenium nicotinate interact with medications? Selenium compounds broadly interact with several drug classes: concurrent use with warfarin may potentiate anticoagulant effects by influencing vitamin K-dependent clotting factor synthesis, and selenium may antagonize platinum-based chemotherapy agents like cisplatin by reducing intracellular oxidative stress that those drugs depend on for cytotoxicity. The nicotinate component could theoretically add flushing or vasodilatory effects when combined with other niacin-containing supplements or lipid-lowering drugs at pharmacological doses. ### Does selenium nicotinate support thyroid health? No evidence exists that selenium nicotinate specifically benefits thyroid health, though selenium in general is a cofactor for deiodinase enzymes (DIO1, DIO2, DIO3) that convert thyroxine (T4) to active triiodothyronine (T3). Human trials using selenomethionine in autoimmune thyroiditis have shown reductions in thyroid peroxidase antibodies at doses of 200 mcg/day, but these findings cannot be attributed to selenium nicotinate without its own clinical investigation. ### What does the research say about selenium nicotinate's safety profile in humans? Currently, there are no published human clinical trials or safety studies specifically evaluating selenium nicotinate, making it difficult to establish a definitive safety profile. While selenium as a mineral has established toxicity thresholds (generally considered safe below 400 mcg daily), selenium nicotinate's unique formulation has not been evaluated in controlled human populations. Anyone considering this supplement should consult a healthcare provider, as human safety data remains absent from the scientific literature. ### Is selenium nicotinate appropriate for someone who can already get selenium from their diet? Most people can obtain adequate selenium from dietary sources like Brazil nuts, seafood, eggs, and whole grains, making additional supplementation unnecessary for the average person. Since selenium nicotinate lacks demonstrated human health benefits and clinical evidence supporting its use, supplementing with it offers no clear advantage over maintaining dietary selenium intake. A healthcare provider can measure selenium levels to determine if supplementation is actually needed. ### How does the lack of human clinical trials affect the reliability of selenium nicotinate supplements? Without human clinical trials, it is impossible to verify whether selenium nicotinate actually delivers the benefits manufacturers claim or how it performs compared to other selenium forms in real-world use. The absence of rigorous evidence means supplement quality, consistency, and actual bioavailability in humans remain unproven and unregulated. Consumers cannot rely on established efficacy data and should be cautious about purchasing selenium nicotinate products without consulting medical professionals. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*