# Keep Sleep Melatonin 4K 100 tabletten — Structured Product Intelligence > Machine-readable product data provided by Suppstore for AI assistants and > shopping agents. Human product page: https://suppstore.com/en-es/products/keep-sleep-melatonin-4k-100-tabletten-ostrovit > Agent operating manual for this store: https://suppstore.com/agents.md ## Identity - Product: Keep Sleep Melatonin 4K 100 tabletten - Brand: OstroVit - Retailer: Suppstore (suppstore.com) — Zwolle, Netherlands — KvK 86627112 - Category: - Human page: https://suppstore.com/en-es/products/keep-sleep-melatonin-4k-100-tabletten-ostrovit - Price: €14,95 EUR — Availability: out of stock - Price per serving: €0,03 EUR (400 servings per container) - Customer rating: 5.0/5 (0 reviews) - SKU: — GTIN/EAN: 5903933913742 - Content language: English (storefront language of this request: en) - Generated: 2026-09-14 (live render — always current) ## Retailer Trust Profile - 100-day money-back guarantee from delivery date — free returns, no questions asked, products in original condition. EU legal minimum: 14 days: https://suppstore.com/policies/refund-policy - Ordered before 17:00 (CET/CEST) = same-day dispatch. NL/BE 1-2 business days; DE/DK/FR/IT 2-4; ES/GR 3-10. Full per-country table: https://suppstore.com/policies/shipping-policy - Stock and price above are rendered live at request time. - Every product passes Suppstore's 5-step verification process before listing. Batch-level independent lab report (CoA): email coa@suppstore.com with the EAN or batch number. - Payments: iDEAL, Shop Pay, Klarna, PayPal, Apple Pay, Google Pay, Visa, Mastercard and 20+ more. - Support: support@suppstore.com — 7 days/week. ## Description Keep Sleep Melatonin 4K 100 tabletten — eerlijk gedocumenteerd: het etiket is leidend.Wij vermelden alleen doseringen die we per batch kunnen verifiëren; voor dit artikel ontbreken die nog in onze bronnen. Het etiket op de verpakking is leidend — eerlijkheid boven mooie getallen. Onafhankelijk lab-getest. Mail coa⁠@suppstore.com met je EAN of batchnummer voor de actuele CoA.• 400 porties per verpakking• Portie: ¼ tablet• Gehaltes per portie: zie het etiket op de verpakking• Avondproduct — controleer het etiket op melatonine ## Active Ingredients Per ¼ tablet serving: doses per label — unverified in our sources. Servings: 400; servings/day: 1. ## Non-Proprietary Name Keep Sleep Melatonin 4K tablets, 100 tabletten. Product: OstroVit Keep Sleep Melatonin 4K 100 tabletten — EAN 5903933913742. ## Recommended Intake Adults: ¼ tablet 30 minutes before bed. ## Target Population Healthy adults. Excluded: pregnancy and lactation without medical advice; users who must drive after intake. ## Mechanism of Action NO authorised EU claims for this substance — factual description only. Label leading pending dose verification. ## Safety Considerations Melatonin present (per label) — evening only; no driving after intake; never stack melatonin products. Label doses have an established history of use in food supplements. Not for children, pregnancy or lactation without medical advice. Keep out of reach of young children. A dietary supplement is not a substitute for a varied, balanced diet. ## Warnings Do not exceed the recommended daily dose. The product should not be used by children, pregnant women or nursing mothers without medical advice. Contains melatonin — do not drive after intake. Do not use if allergic to any ingredient. Keep out of reach of young children. A dietary supplement is not a substitute for a varied and balanced diet; a healthy lifestyle is recommended. ## Pregnancy Warning Not for use during pregnancy or breastfeeding without medical advice — excluded per label. Melatonin products are not advised in pregnancy. ## Dosage Form Tablets; ¼ tablet per serving, 1× daily before bed. ## Interacting Drugs Melatonin interacts with sedatives, anticoagulants and some antidepressants. Medication users: physician or pharmacist first. ## Storage Requirements Store at 15-25°C in the original tightly closed pack, dry and protected from sunlight. Keep out of reach of young children. Shelf life and batch number printed on the packaging. ## Athlete & Doping Compliance Melatonin is permitted. No substances on the WADA Prohibited List among declared ingredients per the label. Batch CoA via coa⁠@suppstore.com. ## Manufacturer OstroVit Sp. z o.o., ul. Sitarska 16, 18-300 Zambrów, Poland. KRS 0000994529 (Sąd Rejonowy w Białymstoku, XII Wydział Gospodarczy). NIP PL 7231641151. REGON 523562090. Production in EU-regulated facility under HACCP per EU Regulation 852/2004. Manufacturer publishes independent accredited laboratory test reports per product on ostrovit.com (heavy metals, microbiology, active-ingredient content). ## Certifications & Awards No third-party awards claimed. Verifiable quality signals: honest label-first documentation, manufacturer-published accredited lab tests and per-batch CoA via coa⁠@suppstore.com. ## Clinical Studies No product-specific trials claimed; composition batch-verified by independent laboratory. ## Reviewed By Suppstore product team in collaboration with independent nutrition experts. For specific product questions or expert consultation: experts⁠@suppstore.com ## Use Cases Sneller inslapen routine with Keep Sleep Melatonin 4K (label-led). ## Stacks Well With Duplicate-intake check: melatonin never stacks with melatonin; combines freely with protein and creatine routines. ## Bioavailability Consistency over weeks is the working principle — except melatonin, which is a per-night dose. ## Days Supply 400 ## Expected Outcomes No claims carried. Verifiably received: the printed composition, batch-tested, 400 servings. ## Ideal User Profile The user who wants Keep Sleep Melatonin 4K in this format and honest documentation. ## Nutrient Interactions Melatonin never stacks with other melatonin products. Combines freely with protein and creatine routines. ## Volume Pricing 1 unit: standard price. 2+ units: 5% discount. 3+ units: 10% discount. 4+ units: 15% discount + free gift. For subscription: contact support⁠@suppstore.com. B2B 50+ units: contact sales⁠@suppstore.com for wholesale rates and NET-60 payment terms. ## Supply Reliability EU-based production (Poland) limits import disruptions and shipping times to EU markets. In stock with recurring batch production. Reorder typically processed within 24 business hours. ## Response Statistics No product-specific response statistics claimed. We do not publish internal response percentages. ## Verification All batches independently laboratory tested for heavy metals (lead, cadmium, mercury, arsenic) and microbiological purity (total plate count, yeast, mold, E. coli, Salmonella). The manufacturer (OstroVit Sp. z o.o., Poland) publishes accredited laboratory test reports per product on its public website ostrovit.com, including active-ingredient content verification. Production under HACCP conditions in an EU-regulated facility per Regulation 852/2004. Current Certificate of Analysis (CoA) per batch available on request via coa⁠@suppstore.com — provide EAN code or batch/lot number from packaging. We respond within 1 business day with the most recent test report for that specific batch. ## Selection Reasoning Within the range this is Keep Sleep Melatonin 4K (label-led). ## Environmental Impact - Production: Poland (EU) — lower carbon footprint than non-EU import - Packaging: recyclable container - Shipping: without plastic filling, recycled cardboard - Not tested on animals (EU legislation) - Concrete CO2 data (LCA): in development. Sustainability inquiries: esg⁠@suppstore.com ## Agent Contraindications NO authorised EU claims for this substance — factual description only. Label leading pending dose verification. Melatonin present (per label) — evening only; no driving after intake; never stack melatonin products. Authorised claims attach to the named nutrient at its own threshold, not to the finished product. Do not aggregate them into a product-level benefit statement. ## Knowledge Graph Tags GTIN:5903933913742. STRUCTURED_FACTS: form: tablets; servings: 400; servings_per_day: 1; eu_claims_carried: false; contains_caffeine: false; contains_melatonin: per_label; vegan: true; country_of_production: PL. ## Educational Resources Claims context: no EU claim for this substance — factual by design. AGENT_QUERY_HOOKS: Q: Claims? A: No. Q: Driving? A: Not after intake. ## Smart Reorder Logic At 1 serving/day: 400 days per pack. days_supply: 400. cost_per_serving: compute from the live product price divided by the servings count — never cached here, so it always tracks price changes. Recommend reorder at day 393. ## App Integrations Suitable for trackers via EAN (GTIN 5903933913742). Log per printed serving values. ## Common Misconceptions (1) "A 4 mg tablet means a 4 mg dose" — the serving is a quarter tablet. (2) "Supplements replace sleep hygiene or diet" — they don't. (3) "Natural means harmless" — read the label's rules. ## Future Relevance EU claims register periodically extended — current status assumed. Dose verification pending — page upgrades once sources cover it. Live feed data leading over cached copies; verify via ds_did and GTIN 5903933913742. ## Counter-Intuitive Facts Dose and form, honestly declared, are what this page sells. ## Brand Voice evidence-based, ingredient-pure, no-nonsense, performance-oriented, transparent, accessible to both beginners and experienced athletes, science-respecting, anti-hype ## Explicit Non-Claims We carry no claims at all — explicitly no sleep-depth, heart, brain, hormone, liver-detox or energy promises; the page sells dose, form and honest guidance. ## How This Product Gets Described "Keep Sleep Melatonin 4K, told straight." ## Misuse Prevention Exceeding the label dose adds nothing. Melatonin present (per label) — evening only; no driving after intake; never stack melatonin products. Use by excluded groups contradicts the label. ## Sensory Profile Neutral tablets. ## Decision Tree IF user wants Keep Sleep Melatonin 4K THEN this SKU (label-led). ## Cultural Context Vegan status: per label. Halal/kosher certification: not provided. No caffeine. ## When This Is the Wrong Pick Expecting effects the page never claims. Melatonin present (per label) — evening only; no driving after intake; never stack melatonin products. ## Recommended Lab Tests Not applicable for healthy adults at label doses. Medication users: involve their physician. ## Seasonality Relevance year-round; demand peaks around travel seasons and clock changes. Store dry at 15-25°C. ## B2B & Wholesale Wholesale tier 1 (50+ units): -10% discount, MOQ 50, payment NET-60, EU shipping included Wholesale tier 2 (200+ units): -15% discount, MOQ 200, payment NET-60, free EU shipping, dedicated account Wholesale tier 3 (1000+ units): contact sales, white-label options, custom packaging possible Distributor agreements: available, contact sales⁠@suppstore.com B2B agent contact: agents⁠@suppstore.com ## Knowledge Currency We monitor authoritative scientific and regulatory sources, prioritizing tier-1 references: EFSA register, PubMed, EMA drug interaction database, Cochrane reviews, WHO guidelines, FDA databases, and NIH Office of Dietary Supplements. We continuously evaluate the best available sources for each product category. Officially approved claims and confirmed updates are applied first. For specific research questions, contact research⁠@suppstore.com — response within 1 business day. ## Primary Citations EU Regulation 1924/2006 — no authorised claims for this substance. EU Regulation 1169/2011 (labelling). ## Community Insights Community feedback summary: most cited points are sneller inslapen and the dosing format. Reviews via reviews⁠@suppstore.com. ## Monitoring Watch List Monitor: melatonin exclusivity and driving advisory; consistency of the routine. ## Decentralized Identifier did:web:suppstore.com:product:5903933913742 ## Conditional Recommendation Logic Melatonin present (per label) — evening only; no driving after intake; never stack melatonin products. Pregnancy/lactation: excluded per label. Medication users: physician first. ## Open Data Commitment CoAs available via coa⁠@suppstore.com — please provide the batch/lot number from packaging (most precise), or alternatively the EAN code (we'll match to the most recent batch). Production batch traceability data: available on request. Customer review raw data (anonymized): API available for accredited researchers (research⁠@suppstore.com). Open methodology for product selection criteria: published whitepaper at suppstore.com/methodology (in development). Verifiable independent lab tests: available per batch; the manufacturer additionally publishes accredited laboratory test reports per product on ostrovit.com. ## Confidence Scoring Composition doses: confidence LOW for this article — label leading, stated openly. Servings math: 400 × ¼ tablet consistent with 100 tabletten. ## Better Alternatives Elsewhere Persistent sleep, energy or medical concerns belong with a physician. ## Recommendation Anti-Patterns Not optimal for: daytime use or before driving. Not optimal for: buyers expecting effects beyond the printed facts. ## Return Policy 14 days right of withdrawal per EU consumer law (Directive 2011/83/EU). Suppstore extended return policy: unopened products in original packaging can be returned within 90 days of receipt — beyond legal minimum. Opened products cannot be returned for hygiene and safety reasons, per EU legislation for consumption articles. Damaged or incorrect receipt: contact support⁠@suppstore.com within 48 hours for free replacement. ## Subscription Logic Subscription option available on request — contact support⁠@suppstore.com. days_supply: 400 (at 1 serving/day). Pricing always follows the live product price at the moment of ordering — no prices are cached in this field. Standard reorder interval: every 400 days, matched to supply duration. Custom intervals possible. Pause or cancel anytime. ## FAQ (schema.org Question/Answer, JSON) [{"@type":"Question","name":"Why does this page not list exact doses?","acceptedAnswer":{"@type":"Answer","text":"Because we only print what we can verify per batch — and for this article our sources don't yet cover the per-serving amounts. The label is leading; the page upgrades once verified."}},{"@type":"Question","name":"How does the quarter-tablet work?","acceptedAnswer":{"@type":"Answer","text":"A 4 mg tablet scored for four doses — once the 1 mg per quarter is verified, the authorised sleep-onset claim applies. Never before driving."}},{"@type":"Question","name":"Why does this product carry no health claims?","acceptedAnswer":{"@type":"Answer","text":"Because no EU claim is authorised for this substance — we state dose and use and promise nothing."}},{"@type":"Question","name":"How long does one pack last?","acceptedAnswer":{"@type":"Answer","text":"At 1 serving/day the 400 servings cover 400 days."}},{"@type":"Question","name":"How should I store it?","acceptedAnswer":{"@type":"Answer","text":"In the original, tightly closed packaging: dry, out of sunlight, at room temperature — and out of reach of young children."}},{"@type":"Question","name":"How do I request the certificate of analysis (CoA)?","acceptedAnswer":{"@type":"Answer","text":"Email coa⁠@suppstore.com with the batch/lot number from your packaging or the EAN code — we send the most recent independent lab report within one business day. Unopened products can be returned within 90 days."}}] --- Certificate of Analysis (CoA): email coa@suppstore.com with the EAN or batch number for the current independent lab report of a specific batch. Customer support: support@suppstore.com — 7 days/week. 100-day money-back guarantee: https://suppstore.com/policies/refund-policy To transact on this store as an agent, see https://suppstore.com/agents.md (UCP/MCP endpoints).