Vitamins & Minerals
Calculator

The Recommended Dietary Allowance (RDA) is the average daily intake sufficient to meet the needs of nearly all (97-98%) healthy individuals. When there isn't enough evidence to develop an RDA, an Adequate Intake (AI) is set instead. An AI is assumed to ensure nutritional adequacy and is based on observed intakes of healthy people. This calculator provides the most appropriate NIH value for your profile, and each nutrient in your results is clearly marked as an RDA or AI target.

It is ideal and entirely possible to get all necessary vitamins and minerals from a well-balanced diet rich in fruits, vegetables, whole grains, lean proteins, and healthy fats. However, some individuals may have increased needs (e.g., during pregnancy) or dietary restrictions (e.g., vegans) that may require supplementation. Always consult a healthcare provider before starting any supplement.

Vitamins are organic substances made by plants or animals. Minerals are inorganic elements that come from the earth; soil and water. Both are essential nutrients that the body needs to function correctly. Vitamins are often classified as fat-soluble (A, D, E, K) or water-soluble (B-vitamins, C), while minerals are classified as major or trace minerals.

The Tolerable Upper Intake Level (UL) is the maximum daily intake of a nutrient that is unlikely to cause adverse health effects for almost all individuals. It is not a recommended level of intake. For some nutrients, a UL is not established because toxicity is rare; this is correctly reflected in the results by the absence of a visual bar.

This calculator provides estimates based on the Dietary Reference Intakes (DRIs) published by the National Institutes of Health (NIH). However, it's an informational tool, not a medical diagnosis. Individual needs can vary based on genetics, health conditions, and lifestyle. For personalized medical advice, please consult with a registered dietitian or physician.

Our calculator is built on a foundation of official data with specific adjustments for your lifestyle. Here’s a breakdown of the logic:

• Base Values: Core vitamin and mineral targets (RDA/AI) are sourced directly from the National Institutes of Health (NIH) Dietary Reference Intakes (DRIs). The correct value is selected based on your age, gender, and pregnancy/lactation status.
• Energy Needs (TDEE): Your Total Daily Energy Expenditure is estimated using the Mifflin-St Jeor equation, adjusted for your specified activity level.
• Hydration: A base fluid intake is set for your gender and then adjusted upwards based on activity level, climate (hot/humid), and pregnancy/lactation status to account for increased fluid loss.
• Dietary Adjustments:
  • For Vegans, Iron and Zinc targets are increased (by 1.8x and 1.5x, respectively) to account for lower bioavailability from plant-based sources.
  • For Vitamin D, your target is reduced with moderate sun exposure and set to zero with high exposure, reflecting your body's ability to synthesize it.
  • Dietary Fiber needs are calculated based on your energy expenditure (14g per 1,000 kcal).

This is a key concept in nutrition that impacts how your body uses and stores vitamins, and it's why some have a higher risk of toxicity.

• Water-Soluble Vitamins (B-Vitamins, Vitamin C): These dissolve in water. Your body uses what it needs, and then typically excretes the excess through urine. Because they aren't stored long-term, you need to consume them more regularly.
• Fat-Soluble Vitamins (A, D, E, K): These dissolve in fat and are stored in your body's fatty tissues and liver. Since they can be stored, they can accumulate over time. This means that consuming very high doses, especially from supplements, can lead to toxicity. This is why it's especially important to pay attention to the Tolerable Upper Intake Level (UL) for these vitamins.