NOW B-100 Caps provide a full, therapeutic spectrum of all eight essential B vitamins standardized to a potent 100 mg (or 100 mcg) baseline, fortified with synergistic co-factors Choline, Inositol, and PABA. Formulated in vegetarian hypromellose capsules, this daily formula directly fuels cellular energy conversion (ATP production), protects nervous system resilience, and supports healthy homocysteine metabolism for cardiovascular balance.
Quick Product Snapshot: 1 Veg Capsule daily · 100 Servings per bottle · Non-GMO · Certified Vegan/Vegetarian · Free of Gluten, Soy, Dairy, and Nuts · Lab-tested for heavy metals and purity.
Distributed by VitaNet®, LLC, an independent, family-owned discount vitamin retailer serving customers online since 1995[cite: 1]. Every purchase is backed by our unconditional 100% money-back guarantee, which includes return shipping even on opened items[cite: 1].
Complete Supplement Facts & Active Ingredients
Each single vegetarian capsule delivers therapeutic concentrations designed to replenish water-soluble nutrients that your body uses and eliminates every day. Below is the verified label analysis for NOW item N0436 (UPC: 733739004369):
Nutrient / Active Ingredient
Amount Per Serving (1 Veg Cap)
% Daily Value (% DV)
Specific Molecular Form
Thiamin (Vitamin B-1)
100 mg
8,333%
Thiamin Hydrochloride (HCl)
Riboflavin (Vitamin B-2)
100 mg
7,692%
Riboflavin
Niacin (Vitamin B-3)
100 mg
625%
Niacinamide (Flush-Free Form)
Vitamin B-6
100 mg
5,882%
Pyridoxine Hydrochloride (HCl)
Folate (Vitamin B-9)
680 mcg DFE (400 mcg Folic Acid)
170%
Folic Acid
Vitamin B-12
100 mcg
4,167%
Cyanocobalamin
Biotin (Vitamin B-7)
100 mcg
333%
d-Biotin
Pantothenic Acid (Vitamin B-5)
100 mg
2,000%
Calcium Pantothenate
Choline
10 mg
2%
Choline Bitartrate
Inositol
10 mg
*
Myo-Inositol
PABA
10 mg
*
Para-Aminobenzoic Acid
* Daily Value (DV) not established.
Other Ingredients: Hypromellose (cellulose vegetable capsule), Ascorbyl Palmitate (fat-soluble antioxidant form of Vitamin C), and Silicon Dioxide (natural anti-caking flow agent).
Allergen & Dietary Purity: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nuts, or sesame ingredients. Produced in an audited GMP facility that processes other ingredients containing these allergens. Verified Non-GMO, Halal, Kosher-friendly, and 100% Vegan/Vegetarian.
How B-100 Works: Plain-English Health Benefits
Unlike fat-soluble vitamins (such as A, D, and E), all B-complex vitamins dissolve in water. Your body absorbs what it needs right away, but it cannot store large quantities of most B vitamins in fat tissues. Extra amounts leave the body every day through your urine. That makes regular daily replenishment essential for sustained vitality and normal metabolic health.
✓ 1. Cellular Energy Conversion (ATP Production)
B-vitamins do not give you jittery "caffeine energy." Instead, vitamins B1, B2, B3, and B5 serve as essential biological spark plugs. In your cellular powerhouses (mitochondria), they help break down carbohydrates, dietary fats, and proteins from your meals and turn them into adenosine triphosphate (ATP)—the fundamental energy currency that runs your heart, muscles, and brain (National Institutes of Health Office of Dietary Supplements, B-Vitamin Compendium).
✓ 2. Nervous System & Stress Resilience
Your brain and central nervous system consume enormous nutritional resources under physical or mental strain. Vitamin B6 (pyridoxine) is a mandatory co-enzyme for manufacturing neurotransmitters like serotonin, dopamine, and GABA, which manage your mood and stress response. Vitamin B12 and Choline protect the protective myelin sheath surrounding your nerve endings, supporting clear nerve transmission and mental focus.
✓ 3. Homocysteine Clearance & Cardiovascular Support
When protein breaks down in your blood, it produces a temporary byproduct called homocysteine. If homocysteine levels rise too high, it can irritate delicate arterial walls and place excess stress on your cardiovascular system. Vitamin B6, Folate (B9), and Vitamin B12 act as a metabolic cleanup crew, converting homocysteine back into harmless methionine and cysteine to keep blood vessels flexible and healthy (American Heart Association / NIH).
✓ 4. Why NOW Adds Choline, Inositol, and PABA
Standard B-complex supplements often skip these vital co-factors. Choline helps your liver process fats and builds acetylcholine for memory. Inositol supports normal insulin cellular signaling and calm neurotransmitter function. PABA (para-aminobenzoic acid) functions as a biological intermediate that supports protein metabolism and cellular health.
NOW Foods Quality Standards: Lab Testing & Strict Contaminant Constraints
Not all supplement brands test their ingredients equally. The FDA sets minimum Current Good Manufacturing Practices (cGMP under 21 CFR Part 111), but cheap online brands often rely entirely on "paper certificates" from raw material brokers without independently verifying purity in a laboratory. NOW Foods operates one of the most advanced private analytical testing complexes in the entire natural products industry.
State-of-the-Art In-House Testing Capabilities
16,000+ Tests Every Month: In their corporate laboratories in Bloomingdale, Illinois, and Sparks, Nevada, NOW conducts over 16,000 individual analytical tests each month on incoming raw botanicals, vitamins, and finished batches.
ISO/IEC 17025 Accredited Laboratories: NOW’s analytical facilities hold independent ISO/IEC 17025 accreditation, verifying that their analytical methods, technician competency, and calibration standards match the scientific rigor of premier independent testing institutes.
Inductively Coupled Plasma Mass Spectrometry (ICP-MS): Raw vitamins are screened using advanced ICP-MS instruments capable of identifying toxic heavy metals down to trace parts-per-billion (ppb) thresholds.
Potency Verification via HPLC / UHPLC: High-Performance Liquid Chromatography separates and measures each individual B-vitamin molecule, ensuring every capsule meets 100% of the active milligram potency claimed on the label right up through the expiration date.
Gas Chromatography & Mass Spectrometry (GC-MS / LC-MS/MS): Advanced multi-residue screening panels test for over 200 common agricultural pesticides, organic impurities, and residual manufacturing solvents.
Strict Contaminant Constraints & Heavy Metal Limits
NOW enforces rigid maximum allowable limits for heavy metals and contaminants that meet or beat the strictest regulatory guidelines globally:
Heavy Metals (Lead, Arsenic, Cadmium, Mercury): Formulated to comply with stringent California Proposition 65 limits (e.g., daily exposure thresholds below 0.5 mcg for lead and 4.1 mcg for arsenic) as well as United States Pharmacopeia (USP) monographs.
Microbiological Pathogen Controls: Every production lot is cultured and tested according to USP <2021> and <2022> safety guidelines, enforcing zero tolerance for dangerous pathogens including Escherichia coli, Salmonella species, and Staphylococcus aureus, alongside strict limits on total yeasts and molds.
Active Industry Watchdog: NOW Foods routinely purchases unfamiliar or generic supplements from major online marketplace portals and runs blind laboratory assays, exposing rampant label fraud, heavy metal contamination, and missing active ingredients across unverified sellers to protect consumer safety.
When you take a NOW B-100 capsule, you know exactly what is inside: pure, therapeutic-grade vitamins verified by cutting-edge analytical chemistry.
Important Health Safeguards, Real Constraints & Edge Cases
High-potency B-complex vitamins are very safe because they are water-soluble. However, responsible health choices require understanding how therapeutic nutrient doses interact with your everyday body chemistry.
⚠ 1. The "Neon Yellow" Urine Effect (Flavinuria)
Within a few hours of taking your first capsule, you will notice your urine turns bright, fluorescent neon yellow. Do not be alarmed—this is 100% normal, harmless, and expected. It is caused by Vitamin B-2 (Riboflavin). The root word flavus is Latin for yellow. Your digestive system absorbs the 100 mg of riboflavin, and your kidneys immediately filter out the harmless excess. In fact, it is visual proof that the capsule has broken down properly in your system.
⚠ 2. Biotin Medical Lab Test Interference Warning
NOW B-100 contains 100 mcg of Biotin (Vitamin B-7). The U.S. Food and Drug Administration (FDA) has issued safety alerts regarding supplemental biotin interfering with certain hospital laboratory blood tests. Biotin is used in laboratory testing technology (streptavidin-biotin immunoassays) and can cause falsely low troponin test results (used by doctors to detect heart attacks) or falsely skewed thyroid test panels (TSH, Free T3, and Free T4). Practical Rule: Always inform your physician that you take supplemental biotin, and pause your B-complex supplement 48 to 72 hours before elective blood work unless otherwise directed by your healthcare provider.
✓ 3. Non-Flushing Niacinamide (No Burning Skin Reaction)
Standard high-dose nicotinic acid causes the blood vessels in your skin to suddenly dilate, triggering an intense, uncomfortable burning sensation known as the "niacin flush." NOW Foods formulates B-100 using Niacinamide (Vitamin B-3), which delivers full cellular energy co-enzyme activity without provoking prostaglandin vasodilation or uncomfortable skin redness.
✓ 4. Vitamin B-6 Upper Intake Boundaries
This formula contains 100 mg of Vitamin B-6 (as Pyridoxine HCl). The National Academy of Medicine establishes 100 mg per day as the Tolerable Upper Intake Level (UL) for adults to protect against peripheral sensory neuropathy during long-term supplementation. If you take NOW B-100 Caps daily, do not combine them with other high-potency standalone B-6 pills or energy drinks packed with excessive pyridoxine.
Practical Usage Guide: How to Take NOW B-100 for Maximum Absorption
Best Time of Day: Morning with Food
Take 1 capsule daily with a meal (such as breakfast or lunch) and a full glass of water. Concentrated B vitamins are acidic and can cause mild nausea or an upset stomach if taken on an empty stomach. Eating food buffers the vitamins and enhances gut absorption.
Why You Should Avoid Taking B-100 at Night
Because B vitamins directly support your body's cellular ATP energy production and neurotransmitter synthesis, taking a capsule close to bedtime can make you feel alert and may disrupt your sleep cycle. Always stick to morning or early afternoon dosing.
Comparison: NOW B-100 Caps vs. NOW B-50 Complex
Feature
NOW B-50 Complex
NOW B-100 CAPS (N0436)
Potency Baseline
50 mg / 50 mcg
100 mg / 100 mcg (Double Strength)
Best For
Daily maintenance, light stress
High stress, athletes, plant-based diets, low energy
Capsule Count
100 or 250 Capsules
100 Veg Capsules (also available in 250 Caps)
Why Choose VitaNet®, LLC for Your Supplements?
Purchasing vitamins online shouldn't feel like a gamble with mystery marketplace sellers. When you order from VitaNet®, LLC, you are backed by authentic retailer heritage and direct customer support:
Serving Customers Online Since 1995: Over 31 years of independent, family-owned industry experience and dedication to natural health biochemistry[cite: 1].
BBB A+ Accredited Business: Recognized for dependable consumer service, transparency, and ethical retail standards[cite: 1].
Unconditional 100% Money-Back Guarantee: We stand behind our catalog so strongly that we cover return shipping even on opened items[cite: 1].
Climate-Controlled Ohio Warehouse: Products are stored and shipped directly from our retail facility at 887 Edison Street Northwest, Hartville, Ohio 44632[cite: 1]. This protects delicate B vitamins from damaging heat, humidity, and degradation.
Direct Telephone Support: Speak directly to our experienced team at (330) 877-8786 during retail business hours for personal assistance[cite: 1].
Enjoy volume discount savings on over 16,000 name-brand supplements while supporting an independent American family business[cite: 1].
Frequently Asked Questions (FAQ)
Why does my urine turn bright neon yellow after taking NOW B-100?
Fluorescent yellow urine is completely normal and safe. It is caused by Vitamin B-2 (Riboflavin). The root word flavus means yellow in Latin. Because B vitamins are water-soluble, your body quickly absorbs what it needs and safely filters out excess amounts through the kidneys into your urine. It is visible confirmation that the capsule has dissolved and entered systemic circulation.
Does NOW B-100 cause an uncomfortable "niacin flush"?
No. NOW Foods formulates this supplement using 100 mg of Niacinamide rather than nicotinic acid. Niacinamide provides full Vitamin B-3 co-enzyme activity without dilating skin blood vessels or triggering itchy, burning redness.
Can the biotin in this formula interfere with hospital lab tests?
Yes, it can. NOW B-100 contains 100 mcg of Biotin (Vitamin B-7). The FDA has cautioned that supplemental biotin can bind to diagnostic testing tools, potentially causing inaccurate troponin (heart attack marker) or thyroid panel results. Always inform your doctor you take biotin, and stop taking the supplement 48 to 72 hours before elective blood draws.
Why are Choline, Inositol, and PABA added to the 8 essential B-vitamins?
While not technically classified as vitamins, Choline, Inositol, and PABA work hand-in-hand with the B-complex. Choline supports liver lipid metabolism and memory-forming acetylcholine; Inositol supports calm cellular signaling and insulin sensitivity; and PABA supports normal protein metabolism and cellular protection.
How does NOW Foods ensure this formula is free of heavy metals and contaminants?
NOW tests its ingredients in in-house ISO/IEC 17025 accredited laboratories running over 16,000 analytical tests monthly. They utilize Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to detect heavy metals (lead, arsenic, cadmium, mercury) down to parts-per-billion, strictly complying with California Proposition 65 and USP limits. They also screen for over 200 pesticides and test every lot for pathogenic bacteria like E. coli and Salmonella.
Who benefits most from a 100 mg high-potency B-complex?
This therapeutic formula is ideal for adults under elevated physical or mental stress, endurance athletes, older adults with reduced digestive absorption, and strict vegetarians or vegans who do not obtain sufficient Vitamin B-12 from animal foods.
Why should I purchase NOW B-100 from VitaNet®, LLC instead of generic online marketplaces?
Third-party open marketplaces are flooded with improperly stored, expired, or counterfeit vitamins. VitaNet®, LLC is a BBB A+ accredited independent retailer operating since 1995 with direct warehouse access in Hartville, Ohio[cite: 1]. We offer authentic inventory stored in climate-controlled conditions and provide an unconditional 100% money-back guarantee that pays for return shipping even if the bottle has been opened[cite: 1].
