One Daily Maximum
21st Century
One Daily Maximum
4.7
★ ★ ★ ★ ★
(7276 ratings)
Molybdenum 160 mcg
Vitamin K 25 mcg
Niacin 20 mg
Iodine 150 mcg
Zinc 15 mg
Iron 18 mg
Chromium 65 mcg
Score 65.0
A highly affordable, comprehensive daily multivitamin that covers a broad range of essential vitamins and minerals. It provides foundational nutritional support, though some ingredient forms may not be optimally absorbed for maximum efficacy.
Quantity: 100 Tablet(s)Servings size: 1 Tablet(s) (100 servings)
Selected goals:
Other goals:
Detoxification
Immunity
Bone Health
Heart Health
Fitness
leaderboard Score 65.0
A highly affordable, comprehensive daily multivitamin that covers a broad range of essential vitamins and minerals. It provides foundational nutritional support, though some ingredient forms may not be optimally absorbed for maximum efficacy.
insights Analysis
21st Century's One Daily Maximum is a broad-spectrum multivitamin designed to provide a wide array of essential vitamins and minerals at generally recommended daily allowances. It serves as a foundational supplement to help fill potential dietary gaps, making it suitable for general nutritional support. While it covers a comprehensive list of micronutrients, many of the minerals are present in less bioavailable forms (e.g., oxides, sulfates, chlorides), which may limit their absorption and overall efficacy compared to chelated alternatives. Similarly, synthetic forms of certain vitamins like DL-Alpha-Tocopheryl Acetate for Vitamin E and Phytonadione for Vitamin K (K1) are used, which are less potent or less relevant for specific benefits (like bone and cardiovascular health for K2) than their natural or active counterparts. Despite these formulation choices, its extremely affordable price and high review count highlight its popularity as a budget-friendly option for basic daily nutrient coverage.
- Extremely cost-effective per serving, making it accessible for daily use.
- Contains a wide array of essential vitamins and minerals, offering broad foundational nutritional support.
- High review count indicates widespread consumer acceptance and availability.
- Many minerals (Magnesium, Zinc, Copper, Chromium) are in less bioavailable forms (oxides, sulfates, chlorides), which can lead to poorer absorption.
- Vitamin K is present as K1 (Phytonadione) rather than the more beneficial K2 (Menaquinone) for bone and cardiovascular health.
- Vitamin E is DL-Alpha-Tocopheryl Acetate, a synthetic form that is less potent than natural D-Alpha-Tocopherol.
- Some trace minerals like Vanadium and Tin are included at very low doses, and their practical benefits for general health supplementation are not well-established.
- Individuals with specific deficiencies or health conditions may require higher doses or more bioavailable forms of certain nutrients than what this general multivitamin provides.
- Contains iron (18mg), which while essential, can be problematic for men and post-menopausal women who do not need extra iron and could accumulate excess.
$6.99($0.06 per serving)
 iHerb | $ 6.99 |
bolt Effectiveness for goals
Vitamin D3 is essential for the body's absorption of calcium from the diet, helping to maintain adequate calcium levels in the blood. Together, they contribute significantly to building and maintaining strong bones and teeth, and play a crucial role in bone density. This synergy helps prevent conditions related to weak bones.
Vitamin C significantly enhances the absorption of non-heme iron, which is the type found in plant-based foods and many supplements. It converts iron into a more readily absorbable form in the digestive tract. This interaction is particularly beneficial for individuals looking to maximize iron uptake from their diet.
B vitamins function synergistically, meaning they work together in numerous bodily processes, particularly energy metabolism, nervous system health, and red blood cell formation. A deficiency in one B vitamin can sometimes impact the effectiveness or metabolism of others. Therefore, combining them helps ensure comprehensive support for these interconnected functions.
These nutrients act as antioxidants, which help to protect the body's cells from damage caused by unstable molecules called free radicals. This protective action is important for maintaining overall cellular health and function. They work together in various pathways to neutralize these damaging compounds.
Zinc and copper compete for absorption in the small intestine, and an imbalance, particularly excessive zinc intake, can lead to copper deficiency. Copper is essential for iron metabolism, immune function, and energy production. Therefore, a balanced intake of both minerals is crucial for preventing deficiencies and supporting overall health.
schedule Dosage, timing & forms
B vitamins, including Thiamine, Riboflavin, and Vitamin B12, play roles in energy metabolism. Many individuals prefer to take supplements containing these B vitamins in the morning or early afternoon. This timing is chosen to align with the body's natural energy cycles and to potentially avoid interference with sleep if taken too late.
Iron, provided as ferrous fumarate, is generally recommended to be taken with food to minimize potential stomach upset. Calcium, from dicalcium phosphate and calcium carbonate, can also be taken with food to potentially aid absorption. Taking these minerals with a meal can enhance comfort and bioavailability for some individuals.
Vitamin A Acetate is a preformed vitamin A, meaning it is already in an active form that the body can use directly. Beta-carotene is a provitamin A, which the body converts into active vitamin A as needed. Both forms contribute to overall vitamin A intake and support various bodily functions.
Yes, calcium, especially in larger quantities, can potentially inhibit the absorption of non-heme iron (the type found in supplements like ferrous fumarate). To optimize absorption, some experts suggest taking iron and calcium supplements at different times. However, the effect within a single multivitamin dose is often considered less significant.
Yes, fat-soluble vitamins such as Vitamin D3 (Cholecalciferol) and Vitamin E (DL-Alpha-Tocopheryl Acetate) are better absorbed when consumed with a meal that contains some dietary fat. Fat helps with their emulsification and uptake into the body's lymphatic system. This enhances their bioavailability.
health_and_safety Safety & interactions
Yes, ingredients such as Vitamin K and high doses of Vitamin E can interact with anticoagulant medications like warfarin. This interaction may affect blood clotting and medication effectiveness. Always consult a healthcare professional about potential interactions with your prescriptions.
Yes, high doses of calcium can interfere with the absorption of iron and zinc when consumed simultaneously. Multivitamins are often formulated to balance these interactions, but excessive intake of one mineral might still impact others. To optimize absorption, some suggest taking these minerals at different times, though this is less practical for a daily multivitamin.
Both iodine and selenium are essential for healthy thyroid hormone production and function. However, excessive iodine intake can sometimes impact thyroid function, particularly in individuals with pre-existing thyroid conditions. Those with thyroid disorders should discuss supplement use with a healthcare professional.
Combining a multivitamin with other individual vitamin or mineral supplements could lead to excessive intake of certain nutrients. Over-consumption of some vitamins (e.g., A, D) and minerals (e.g., iron, zinc) can be harmful. Always review total daily intake from all sources to avoid exceeding tolerable upper intake levels.
Individuals with kidney conditions should be cautious with supplements containing minerals like potassium and phosphorus. Impaired kidney function can hinder the body's ability to excrete excess minerals, potentially leading to harmful accumulation. Consulting a healthcare provider is essential before using such supplements.
Ingredients
| Ingredient | Amount per serving |
|---|---|
Vitamin A | 750 mcg |
Vitamin C | 60 mg |
Vitamin D3 | 10 mcg |
Vitamin E | 13.5 mg |
Vitamin K | 25 mcg |
Thiamine | 1.5 mg |
Riboflavin | 1.7 mg |
Niacin | 20 mg |
Vitamin B6 | 2 mg |
Folate | 667 mcg DFE |
Vitamin B12 | 6 mcg |
Biotin | 30 mcg |
Pantothenic Acid | 10 mg |
Calcium | 162 mg |
Iron | 18 mg |
Phosphorus | 109 mg |
Iodine | 150 mcg |
Magnesium | 100 mg |
Zinc | 15 mg |
Selenium | 20 mcg |
Copper | 2 mg |
Manganese | 3.5 mg |
Chromium | 65 mcg |
Molybdenum | 160 mcg |
Chloride | 72 mg |
Potassium | 80 mg |
Boron | 150 mcg |
Tin | 10 mcg |
Silicon | 2 mg |
Vanadium | 10 mcg |
Categories
Iodine 80.0
Provides 150mcg of Iodine from Potassium Iodide, which is the recommended daily intake for adults, crucial for thyroid hormone production and metabolic regulation.
Molybdenum 80.0
Provides 160mcg of Molybdenum from Sodium Molybdate. This is a robust dose for a trace mineral essential for various enzymatic functions, generally well-tolerated and important for overall metabolic health.
Chloride 70.0
Provided as Potassium Chloride, it is an essential electrolyte that contributes to fluid balance and nerve function, present in a standard and appropriate quantity for a multivitamin.
Goals
General Health 80.0
Provides a comprehensive spectrum of essential vitamins and minerals at or near recommended daily allowances, serving as a solid nutritional foundation.
Energy 75.0
Features a full complex of B vitamins crucial for energy metabolism, and iron for oxygen transport, offering good support for daily energy levels.
Metabolism Boost 70.0
Contains B vitamins and Chromium, which are involved in nutrient metabolism, providing foundational support rather than a significant 'boost.'