<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Nutrition Supplement Calculator</title>
<style>
/* General Body & Layout Styles */
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
line-height: 1.6;
color: #333;
max-width: 1200px;
margin: 0 auto;
padding: 20px;
background-color: #f5f7fa;
}
header {
text-align: center;
margin-bottom: 30px;
padding: 20px;
background-color: #2c3e50;
color: white;
border-radius: 8px;
}
h1 {
margin: 0;
font-size: 2.2em;
}
.subtitle {
font-style: italic;
opacity: 0.9;
}
/* Tab System Styles */
.tabs {
display: flex;
margin-bottom: -1px; /* Overlap border */
border-bottom: 1px solid #ddd;
}
.tab {
padding: 10px 20px;
cursor: pointer;
background-color: #f1f1f1;
border: 1px solid #ddd;
border-bottom: none;
border-radius: 5px 5px 0 0;
margin-right: 5px;
/* Reset button-specific styles for accessibility improvement */
font-family: inherit;
font-size: 1em;
}
.tab.active {
background-color: #3498db;
color: white;
border-color: #3498db;
}
.tab-content {
display: none;
background: white;
padding: 20px;
border-radius: 0 5px 5px 5px;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.tab-content.active {
display: block;
}
/* Input & Form Styles */
.input-section {
display: grid;
grid-template-columns: 1fr 2fr;
gap: 15px;
align-items: center;
margin-bottom: 20px;
}
label {
font-weight: bold;
}
select, input[type="number"] {
padding: 8px;
border: 1px solid #ddd;
border-radius: 4px;
width: 100%;
box-sizing: border-box;
}
button {
background-color: #3498db;
color: white;
border: none;
padding: 10px 15px;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
}
.calculate-btn {
grid-column: span 2;
margin-top: 10px;
}
button:hover, .calculate-btn:hover {
background-color: #2980b9;
}
/* Unit Selection (Radio Buttons) */
.unit-selection {
grid-column: span 2;
margin: 10px 0;
}
.unit-selection label {
margin-right: 15px;
font-weight: normal;
}
.unit-selection input {
margin-right: 5px;
}
/* Error Message Style */
.error-message {
grid-column: span 2;
color: #c0392b;
text-align: center;
margin: -5px 0 10px 0;
font-weight: bold;
}
/* Results Section Styles */
.results-section {
margin-top: 20px;
padding: 15px;
background-color: #f9f9f9;
border-radius: 5px;
}
.result-row {
display: flex;
justify-content: space-between;
margin-bottom: 10px;
padding-bottom: 10px;
border-bottom: 1px solid #eee;
}
.result-row:last-child {
border-bottom: none;
}
.result-label {
font-weight: bold;
}
table {
width: 100%;
border-collapse: collapse;
margin: 20px 0;
}
th, td {
padding: 12px;
text-align: left;
border-bottom: 1px solid #ddd;
}
th {
background-color: #2c3e50;
color: white;
}
tr:nth-child(even) {
background-color: #f2f2f2;
}
.secondary-info {
margin-top: 20px;
padding: 15px;
background-color: #e8f4fc;
border-radius: 5px;
}
/* Responsive Design */
@media (max-width: 768px) {
.input-section {
grid-template-columns: 1fr;
}
.calculate-btn {
grid-column: span 1;
}
}
</style>
</head>
<body>
<header>
<h1>Nutrition Supplement Calculator</h1>
<p class="subtitle">Calculate elemental amounts and RDA percentages for minerals and vitamins</p>
</header>
<div class="tabs">
<button class="tab active" data-tab="minerals">Minerals</button>
<button class="tab" data-tab="vitamins">Vitamins</button>
</div>
<div id="minerals" class="tab-content active">
<div class="input-section">
<label for="mineral-select">Select Mineral:</label>
<select id="mineral-select">
<option value="">-- Select Mineral --</option>
</select>
<label for="mineral-salt-form">Salt Form:</label>
<select id="mineral-salt-form">
<option value="">-- Select Mineral First --</option>
</select>
<label for="mineral-dose">Your Supplement Dose (mg):</label>
<input type="number" id="mineral-dose" step="0.01" min="0">
<div id="mineral-error" class="error-message"></div>
<button id="calculate-mineral" class="calculate-btn">Calculate</button>
</div>
<div class="results-section" id="mineral-results" style="display: none;">
<div class="result-row">
<span class="result-label">Elemental Amount:</span>
<span id="elemental-mineral-result">0 mg</span>
</div>
<h3>RDA Percentage by Age/Gender Group</h3>
<table>
<thead>
<tr>
<th>Group</th>
<th>RDA (mg/day)</th>
<th>% RDA</th>
</tr>
</thead>
<tbody id="mineral-rda-results">
</tbody>
</table>
<div class="secondary-info" id="mineral-secondary-info">
</div>
</div>
</div>
<div id="vitamins" class="tab-content">
<div class="input-section">
<label for="vitamin-select">Select Vitamin:</label>
<select id="vitamin-select">
<option value="">-- Select Vitamin --</option>
</select>
<label for="vitamin-form">Form:</label>
<select id="vitamin-form">
<option value="">-- Select Vitamin First --</option>
</select>
<div class="unit-selection">
<label>Units:</label>
<input type="radio" name="vitamin-units" value="mg" id="vitamin-mg" checked>
<label for="vitamin-mg">mg</label>
<input type="radio" name="vitamin-units" value="mcg" id="vitamin-mcg">
<label for="vitamin-mcg">mcg</label>
<input type="radio" name="vitamin-units" value="IU" id="vitamin-IU">
<label for="vitamin-IU">IU</label>
</div>
<label for="vitamin-dose">Your Supplement Dose:</label>
<input type="number" id="vitamin-dose" step="0.01" min="0">
<div id="vitamin-error" class="error-message"></div>
<button id="calculate-vitamin" class="calculate-btn">Calculate</button>
</div>
<div class="results-section" id="vitamin-results" style="display: none;">
<div class="result-row">
<span class="result-label">Elemental Amount:</span>
<span id="elemental-vitamin-result">0 mg</span>
</div>
<h3>RDA Percentage by Age/Gender Group</h3>
<table>
<thead>
<tr>
<th>Group</th>
<th>RDA</th>
<th>% RDA</th>
</tr>
</thead>
<tbody id="vitamin-rda-results">
</tbody>
</table>
<div class="secondary-info" id="vitamin-secondary-info">
</div>
</div>
</div>
<script>
const mineralData = {
calcium: {
name: "Calcium",
saltForms: [
{ id: "carbonate", name: "Calcium Carbonate", percentage: 0.40 },
{ id: "citrate", name: "Calcium Citrate", percentage: 0.2407 },
{ id: "citrate-maleate", name: "Calcium Citrate Maleate", percentage: 0.1845 },
{ id: "asparto-glycinate", name: "Calcium Asparto Glycinate", percentage: 0.1529 },
{ id: "phosphate", name: "Calcium Phosphate", percentage: 0.3876, secondary: { name: "Phosphorous", percentage: 0.1996 } },
{ id: "orotate", name: "Calcium Orotate", percentage: 0.1144 },
{ id: "gluconate", name: "Calcium Gluconate", percentage: 0.0931 },
{ id: "lactate", name: "Calcium Lactate", percentage: 0.1836 },
{ id: "pantothenate", name: "Calcium Pantothenate", percentage: 0.0840, secondary: { name: "Pantothenic Acid", percentage: 0.9160 } },
{ id: "dicalcium-phosphate", name: "Dicalcium Phosphate", percentage: 0.2945, secondary: { name: "Phosphorous", percentage: 0.2276 } },
{ id: "ascorbate", name: "Calcium L-Ascorbate Dihydrate", percentage: 0.0940, secondary: { name: "Ascorbic Acid", percentage: 0.8260 } },
{ id: "citrate-tetrahydrate", name: "Citrate Tetrahydrate Calcium", percentage: 0.21, secondary: { name: "Citric Acid", percentage: 0.3367 } },
{ id: "citrate-malate", name: "Calcium Citrate malate", percentage: 0.66 },
{ id: "aspartate", name: "Calcium Aspartate", percentage: 0.2341 },
{ id: "lysinate", name: "Calcium Lysinate", percentage: 0.1212 }
],
rdaGroups: [
{ name: "Infants (0-6m)", rda: 200 }, { name: "Infants (7-12m)", rda: 260 }, { name: "Children (1-3y)", rda: 700 }, { name: "Children (4-8y)", rda: 1000 }, { name: "Adolescents (9-18y)", rda: 1300 }, { name: "Adults (19-50y)", rda: 1000 }, { name: "Men (51-70y)", rda: 1000 }, { name: "Women (51-70y)", rda: 1200 }, { name: "Adults (71+y)", rda: 1200 }, { name: "Pregnancy/Lactation (14-18y)", rda: 1300 }, { name: "Pregnancy/Lactation (19-50y)", rda: 1000 }
]
},
chromium: {
name: "Chromium",
saltForms: [
{ id: "picolinate", name: "Chromium Picolinate", percentage: 0.1242 }, { id: "chloride", name: "Chromium Chloride", percentage: 0.3283, secondary: { name: "Chloride", percentage: 0.2238 } }, { id: "nicotinate", name: "Chromium Piconicotinate or Chromium nicotinate", percentage: 0.2986 }, { id: "trioxide", name: "Chromium trioxide", percentage: 0.5199 }, { id: "chloride-hexahydrate", name: "Chromium Chloride Hexahydrate", percentage: 0.1951 }
],
rdaGroups: [
{ name: "Men (19-50y)", rda: 0.035 }, { name: "Women (19-50y)", rda: 0.025 }, { name: "Pregnancy", rda: 0.030 }, { name: "Lactation", rda: 0.045 }
]
},
copper: {
name: "Copper",
saltForms: [
{ id: "sulphate", name: "Copper Sulphate or Cupric Sulphate", percentage: 0.3981 }, { id: "citrate", name: "Cupric Citrate", percentage: 0.1990 }, { id: "gluconate", name: "Copper Gluconate", percentage: 0.14 }, { id: "oxide", name: "Cupric Oxide", percentage: 0.7988 }, { id: "sulphate-pentahydrate", name: "Copper Sulphate Pentahydrate", percentage: 0.2545 }
],
rdaGroups: [
{ name: "Adults (19+y)", rda: 0.9 }, { name: "Pregnancy", rda: 1.0 }, { name: "Lactation", rda: 1.3 }
]
},
iron: {
name: "Iron (Ferrous)",
saltForms: [
{ id: "gluconate", name: "Ferrous Gluconate", percentage: 0.1158 }, { id: "ammonium-citrate", name: "Ferric Ammonium Citrate", percentage: 0.2131 }, { id: "ascorbate", name: "Ferrous Ascorbate", percentage: 0.1375 }, { id: "bisglycinate", name: "Ferrous Bisglycinate", percentage: 0.2737 }, { id: "sulphate", name: "Ferrous Sulphate", percentage: 0.3675 }, { id: "aspartoglycinate", name: "Ferrous Aspartoglycinate", percentage: 0.2131 }, { id: "fumarate", name: "Ferrous Fumarate", percentage: 0.3286 }, { id: "choline-citrate", name: "Iron Choline Citrate", percentage: 0.1590 }, { id: "pyrophosphate", name: "Ferric Pyrophosphate", percentage: 0.0749 }
],
rdaGroups: [
{ name: "Children (1-3y)", rda: 7 }, { name: "Children (4-8y)", rda: 10 }, { name: "Men (19-50y)", rda: 8 }, { name: "Women (19-50y)", rda: 18 }, { name: "Adults (51+y)", rda: 8 }, { name: "Pregnancy", rda: 27 }
]
},
magnesium: {
name: "Magnesium",
saltForms: [
{ id: "oxide", name: "Magnesium Oxide", percentage: 0.6030 }, { id: "dioxide", name: "Magnesium Dioxide", percentage: 0.4317 }, { id: "sulfate", name: "Magnesium Sulfate", percentage: 0.20 }, { id: "glycinate", name: "Magnesium Glycinate", percentage: 0.1409 }, { id: "biglycinate", name: "Magnesium Biglycinate", percentage: 0.14 }, { id: "hydroxide", name: "Magnesium Hydroxide", percentage: 0.4166 }, { id: "gluconate", name: "Magnesium Gluconate", percentage: 0.0539 }, { id: "chloride", name: "Magnesium Chloride", percentage: 0.2552 }, { id: "citrate", name: "Magnesium Citrate", percentage: 0.1133 }, { id: "carbonate", name: "Magnesium carbonate", percentage: 0.2882 }, { id: "l-theonate", name: "Magnesium L Theonate", percentage: 0.0825 }, { id: "acetyl-taurate", name: "Magnesium Acetyl Taurate", percentage: 0.0681 }, { id: "ascorbate", name: "Magnesium Ascorbate", percentage: 0.0648 }, { id: "hydrochloride", name: "Magnesium Hydrochloride", percentage: 0.40 }, { id: "aspartate", name: "Magnesium Aspartate", percentage: 0.0842 }
],
rdaGroups: [
{ name: "Men (19-30y)", rda: 400 }, { name: "Women (19-30y)", rda: 310 }, { name: "Men (31+y)", rda: 420 }, { name: "Women (31+y)", rda: 320 }, { name: "Pregnancy", rda: 350 }, { name: "Lactation", rda: 310 }
]
},
manganese: {
name: "Manganese",
saltForms: [
{ id: "sulphate", name: "Manganese Sulphate", percentage: 0.3637 }, { id: "chloride", name: "Manganese Chloride", percentage: 0.4364 }, { id: "sulphate-monohydrate", name: "Manganese Sulphate Monohydrate", percentage: 0.3249 }, { id: "glycinate", name: "Manganese Glycinate", percentage: 0.2705 }, { id: "oxide", name: "Manganese Oxide", percentage: 0.6318 }
],
rdaGroups: [
{ name: "Men (19+y)", rda: 2.3 }, { name: "Women (19+y)", rda: 1.8 }, { name: "Pregnancy", rda: 2.0 }, { name: "Lactation", rda: 2.6 }
]
},
molybdenum: {
name: "Molybdenum",
saltForms: [
{ id: "pentoxide", name: "Molybdenum Pentoxide", percentage: 0.6665 }, { id: "sodium-molybdate", name: "from Sodium Molybdate", percentage: 0.4659 }, { id: "sodium-molybdate-dihydrate", name: "from Sodium Molybdate Dihydrate", percentage: 0.3965 }
],
rdaGroups: [
{ name: "Adults (19+y)", rda: 0.045 }, { name: "Pregnancy/Lactation", rda: 0.050 }
]
},
potassium: {
name: "Potassium",
saltForms: [
{ id: "sulfate", name: "Potassium Sulfate", percentage: 0.4486 }, { id: "iodide", name: "Potassium Iodide", percentage: 0.2349, secondary: { name: "Iodine", percentage: 0.7644 } }, { id: "chloride", name: "Potassium Chloride", percentage: 0.5243 }, { id: "citrate", name: "Potassium Citrate", percentage: 0.1275 }, { id: "aspartate", name: "Aspartate Potassium", percentage: 0.1084 }, { id: "magnesium-citrate", name: "Potassium Magnesium Citrate", percentage: 0.1548, secondary: { name: "Magnesium", percentage: 0.0962 } }, { id: "phosphate-monobasic", name: "Potassium Phosphate Monobasic", percentage: 0.2873 }, { id: "carbonate", name: "Potassium Carbonate", percentage: 0.5656 }
],
rdaGroups: [
{ name: "Men (19+y)", rda: 3400 }, { name: "Women (19+y)", rda: 2600 }, { name: "Pregnancy", rda: 2900 }, { name: "Lactation", rda: 2800 }
]
},
selenium: {
name: "Selenium",
saltForms: [
{ id: "sodium-selenite", name: "from Sodium Selenite", percentage: 0.4565 }, { id: "sodium-selenate", name: "from Sodium Selenate", percentage: 0.4179 }
],
rdaGroups: [
{ name: "Adults (19+y)", rda: 0.055 }, { name: "Pregnancy", rda: 0.060 }, { name: "Lactation", rda: 0.070 }
]
},
sodium: {
name: "Sodium",
saltForms: [
{ id: "bicarbonate", name: "Sodium Bicarbonate", percentage: 0.2735 }, { id: "carbonate", name: "Sodium Carbonate", percentage: 0.2168 }, { id: "chloride", name: "Sodium Chloride", percentage: 0.3932, secondary: { name: "Chloride", percentage: 0.6066 } }, { id: "salycinate", name: "Sodium Salycinate", percentage: 0.1435 }, { id: "salycylate-selenium", name: "Sodium Salycylate (Selenium)", percentage: 0.1135 }, { id: "molybdate", name: "Sodium Molybdate", percentage: 0.1115, secondary: { name: "Molybdenum", percentage: 0.4659 } }, { id: "molybdate-dihydrate", name: "Sodium Molybdate Dihydrate", percentage: 0.0949, secondary: { name: "Molybdenum", percentage: 0.3965 } }, { id: "selenite", name: "Sodium Selenite", percentage: 0.27, secondary: { name: "Selenium", percentage: 0.4565 } }, { id: "selenate", name: "Sodium Selenate", percentage: null, secondary: { name: "Selenium", percentage: 0.4179 } }, { id: "ascorbate", name: "Sodium Ascorbate", percentage: 0.115, secondary: { name: "Ascorbic Acid", percentage: 0.885 } }, { id: "benzoate", name: "Sodium Benzoate", percentage: 0.1594 }, { id: "citrate", name: "Sodium Citrate (Trisodium Citrate)", percentage: 0.2671 }, { id: "hydrochloride", name: "Sodium Hydrochloride", percentage: 0.0287 }
],
rdaGroups: [
{ name: "Adults (19+y)", rda: 1500 }
]
},
zinc: {
name: "Zinc",
saltForms: [
{ id: "lactate", name: "Zinc Lactate", percentage: 0.2663 }, { id: "sulphate", name: "Zinc Sulphate", percentage: 0.4049 }, { id: "oxide", name: "Zinc Oxide", percentage: 0.8033 }, { id: "gluconate", name: "Zinc Gluconate", percentage: 0.1434 }, { id: "sulphate-monohydrate", name: "Zinc Sulphate Monohydrate", percentage: 0.3642 }, { id: "bisglycinate", name: "Zinc Bisglycinate", percentage: 0.3062 }, { id: "methionine", name: "Zinc Methionine", percentage: 0.2105 }, { id: "sulphate-heptahydrate", name: "Zinc Sulphate Heptahydrate", percentage: 0.2273 }, { id: "acetate", name: "Zinc Acetate", percentage: 0.3564 }
],
rdaGroups: [
{ name: "Men (19+y)", rda: 11 }, { name: "Women (19+y)", rda: 8 }, { name: "Pregnancy", rda: 11 }, { name: "Lactation", rda: 12 }
]
}
};
const vitaminData = {
a: {
name: "Vitamin A",
forms: [
{ id: "retinyl-acetate", name: "Retinyl Acetate", percentage: 1, conversion: { IUToMg: 0.000344 } },
{ id: "retinyl-palmitate", name: "Retinyl Palmitate", percentage: 1, conversion: { IUToMg: 0.00055 } },
{ id: "beta-carotene", name: "Beta-Carotene", percentage: 1, conversion: { IUToMg: 0.0006 } }
],
rdaUnit: "mcg",
rdaGroups: [
{ name: "Men (19+y)", rda: 900 }, { name: "Women (19+y)", rda: 700 }, { name: "Pregnancy", rda: 770 }, { name: "Lactation", rda: 1300 }
]
},
b1: {
name: "Thiamine (B1)",
forms: [
{ id: "mononitrate", name: "Thiamine Mononitrate", percentage: 0.8105 },
{ id: "hydrochloride", name: "Thiamine Hydrochloride", percentage: 0.7845 }
],
rdaUnit: "mg",
rdaGroups: [
{ name: "Men (19+y)", rda: 1.2 }, { name: "Women (19+y)", rda: 1.1 }, { name: "Pregnancy/Lactation", rda: 1.4 }
]
},
b2: {
name: "Riboflavin (B2)",
forms: [
{ id: "riboflavin", name: "Riboflavin", percentage: 1 },
{ id: "riboflavin-5-phosphate", name: "Riboflavin 5'-Phosphate", percentage: 0.73 }
],
rdaUnit: "mg",
rdaGroups: [
{ name: "Men (19+y)", rda: 1.3 }, { name: "Women (19+y)", rda: 1.1 }, { name: "Pregnancy", rda: 1.4 }, { name: "Lactation", rda: 1.6 }
]
},
b3: {
name: "Niacin (B3)",
forms: [
{ id: "niacin", name: "Niacin", percentage: 1 },
{ id: "niacinamide", name: "Niacinamide (Nicotinamide)", percentage: 1 }
],
rdaUnit: "mg",
rdaGroups: [
{ name: "Men (19+y)", rda: 16 }, { name: "Women (19+y)", rda: 14 }, { name: "Pregnancy", rda: 18 }, { name: "Lactation", rda: 17 }
]
},
b5: {
name: "Pantothenic Acid (B5)",
forms: [
{ id: "calcium-pantothenate", name: "from Calcium Pantothenate", percentage: 0.916 },
{ id: "d-pantothenic-acid", name: "D-Pantothenic Acid", percentage: 1 }
],
rdaUnit: "mg",
rdaGroups: [
{ name: "Adults (19+y)", rda: 5 }, { name: "Pregnancy", rda: 6 }, { name: "Lactation", rda: 7 }
]
},
b6: {
name: "Pyridoxine (B6)",
forms: [
{ id: "pyridoxine-hcl", name: "Pyridoxine HCl", percentage: 0.8227 },
{ id: "pyridoxal-5-phosphate", name: "Pyridoxal 5'-Phosphate (P-5-P)", percentage: 1 }
],
rdaUnit: "mg",
rdaGroups: [
{ name: "Adults (19-50y)", rda: 1.3 }, { name: "Men (51+y)", rda: 1.7 }, { name: "Women (51+y)", rda: 1.5 }, { name: "Pregnancy", rda: 1.9 }, { name: "Lactation", rda: 2.0 }
]
},
b7: {
name: "Biotin (B7)",
forms: [ { id: "biotin", name: "Biotin", percentage: 1 } ],
rdaUnit: "mcg",
rdaGroups: [
{ name: "Adults (19+y)", rda: 30 }, { name: "Pregnancy", rda: 30 }, { name: "Lactation", rda: 35 }
]
},
b9: {
name: "Folate (B9)",
forms: [
{ id: "folic-acid", name: "Folic Acid", percentage: 1 },
{ id: "l-methylfolate", name: "L-Methylfolate", percentage: 1 }
],
rdaUnit: "mcg",
rdaGroups: [
{ name: "Adults (19+y)", rda: 400 }, { name: "Pregnancy", rda: 600 }, { name: "Lactation", rda: 500 }
]
},
b12: {
name: "Cobalamin (B12)",
forms: [
{ id: "cyanocobalamin", name: "Cyanocobalamin", percentage: 1 },
{ id: "methylcobalamin", name: "Methylcobalamin", percentage: 1 }
],
rdaUnit: "mcg",
rdaGroups: [
{ name: "Adults (19+y)", rda: 2.4 }, { name: "Pregnancy", rda: 2.6 }, { name: "Lactation", rda: 2.8 }
]
},
c: {
name: "Ascorbic Acid (C)",
forms: [
{ id: "ascorbic-acid", name: "Ascorbic Acid", percentage: 1 },
{ id: "sodium-ascorbate", name: "from Sodium Ascorbate", percentage: 0.885 },
{ id: "calcium-ascorbate", name: "from Calcium Ascorbate", percentage: 0.826 }
],
rdaUnit: "mg",
rdaGroups: [
{ name: "Men (19+y)", rda: 90 }, { name: "Women (19+y)", rda: 75 }, { name: "Pregnancy", rda: 85 }, { name: "Lactation", rda: 120 }
]
},
d: {
name: "Calciferol (D)",
forms: [
{ id: "cholecalciferol-d3", name: "Cholecalciferol (D3)", percentage: 1, conversion: { IUToMg: 0.000025 } },
{ id: "ergocalciferol-d2", name: "Ergocalciferol (D2)", percentage: 1, conversion: { IUToMg: 0.000025 } }
],
rdaUnit: "IU",
rdaGroups: [
{ name: "Adults (19-70y)", rda: 600 }, { name: "Adults (71+y)", rda: 800 }, { name: "Pregnancy/Lactation", rda: 600 }
]
},
e: {
name: "Tocopherol (E)",
forms: [
{ id: "d-alpha-tocopherol", name: "d-alpha-tocopherol (natural)", percentage: 1, conversion: { IUToMg: 0.67 } },
{ id: "dl-alpha-tocopherol", name: "dl-alpha-tocopherol (synthetic)", percentage: 1, conversion: { IUToMg: 0.45 } }
],
rdaUnit: "mg",
rdaGroups: [
{ name: "Adults (19+y)", rda: 15 }, { name: "Pregnancy", rda: 15 }, { name: "Lactation", rda: 19 }
]
},
k: {
name: "Vitamin K",
forms: [
{ id: "k1-phytonadione", name: "K1 (Phytonadione)", percentage: 1 },
{ id: "k2-mk4", name: "K2 (Menaquinone-4)", percentage: 1 },
{ id: "k2-mk7", name: "K2 (Menaquinone-7)", percentage: 1 }
],
rdaUnit: "mcg",
rdaGroups: [
{ name: "Men (19+y)", rda: 120 }, { name: "Women (19+y)", rda: 90 }
]
}
};
document.addEventListener('DOMContentLoaded', () => {
// Function to populate a select dropdown from a data object
const populateSelect = (selectId, data) => {
const selectElement = document.getElementById(selectId);
// Sort the keys alphabetically by the 'name' property
const sortedKeys = Object.keys(data).sort((a, b) => data[a].name.localeCompare(data[b].name));
sortedKeys.forEach(key => {
const option = document.createElement('option');
option.value = key;
option.textContent = data[key].name;
selectElement.appendChild(option);
});
};
// Populate Mineral and Vitamin dropdowns
populateSelect('mineral-select', mineralData);
populateSelect('vitamin-select', vitaminData);
});
// Tab functionality
document.querySelectorAll('.tab').forEach(tab => {
tab.addEventListener('click', () => {
document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
document.querySelectorAll('.tab-content').forEach(c => c.classList.remove('active'));
tab.classList.add('active');
document.getElementById(tab.dataset.tab).classList.add('active');
});
});
// Mineral calculator functionality
document.getElementById('mineral-select').addEventListener('change', function() {
const mineral = this.value;
const saltFormSelect = document.getElementById('mineral-salt-form');
saltFormSelect.innerHTML = '<option value="">-- Select --</option>';
if (mineral && mineralData[mineral]) {
mineralData[mineral].saltForms.forEach(form => {
const option = document.createElement('option');
option.value = form.id;
option.textContent = form.name;
saltFormSelect.appendChild(option);
});
}
});
document.getElementById('calculate-mineral').addEventListener('click', function() {
const mineral = document.getElementById('mineral-select').value;
const saltFormId = document.getElementById('mineral-salt-form').value;
const dose = parseFloat(document.getElementById('mineral-dose').value);
const errorDiv = document.getElementById('mineral-error');
const resultsDiv = document.getElementById('mineral-results');
errorDiv.textContent = '';
resultsDiv.style.display = 'none';
if (mineral && saltFormId && !isNaN(dose) && dose > 0) {
const mineralInfo = mineralData[mineral];
const saltForm = mineralInfo.saltForms.find(f => f.id === saltFormId);
if (!saltForm) {
errorDiv.textContent = 'An error occurred. Please re-select the salt form.';
return;
}
const elementalPercentage = saltForm.percentage;
if (typeof elementalPercentage !== 'number') {
errorDiv.textContent = `Calculation for "${saltForm.name}" is not available due to missing data.`;
return;
}
const elementalAmount = dose * elementalPercentage;
document.getElementById('elemental-mineral-result').textContent = elementalAmount.toFixed(3) + ' mg';
resultsDiv.style.display = 'block';
const rdaResults = document.getElementById('mineral-rda-results');
rdaResults.innerHTML = '';
mineralInfo.rdaGroups.forEach(group => {
const percentage = (elementalAmount / group.rda) * 100;
const row = document.createElement('tr');
row.innerHTML = `
<td>${group.name}</td>
<td>${group.rda} mg</td>
<td>${percentage.toFixed(1)}%</td>
`;
rdaResults.appendChild(row);
});
const secondaryInfo = saltForm.secondary;
const secondaryDiv = document.getElementById('mineral-secondary-info');
if (secondaryInfo && typeof secondaryInfo.percentage === 'number') {
secondaryDiv.innerHTML = `
<h4>Secondary Component</h4>
<p>${secondaryInfo.name}: ${(dose * secondaryInfo.percentage).toFixed(2)} mg (${(secondaryInfo.percentage * 100).toFixed(1)}%)</p>
`;
secondaryDiv.style.display = 'block';
} else {
secondaryDiv.innerHTML = '';
secondaryDiv.style.display = 'none';
}
} else {
errorDiv.textContent = 'Please select a mineral, salt form, and enter a valid dose.';
}
});
// Vitamin calculator functionality
document.getElementById('vitamin-select').addEventListener('change', function() {
const vitamin = this.value;
const formSelect = document.getElementById('vitamin-form');
formSelect.innerHTML = '<option value="">-- Select --</option>';
if (vitamin && vitaminData[vitamin]) {
vitaminData[vitamin].forms.forEach(form => {
const option = document.createElement('option');
option.value = form.id;
option.textContent = form.name;
formSelect.appendChild(option);
});
}
});
document.getElementById('calculate-vitamin').addEventListener('click', function() {
const vitamin = document.getElementById('vitamin-select').value;
const formId = document.getElementById('vitamin-form').value;
let unit = document.querySelector('input[name="vitamin-units"]:checked').value;
const dose = parseFloat(document.getElementById('vitamin-dose').value);
const errorDiv = document.getElementById('vitamin-error');
const resultsDiv = document.getElementById('vitamin-results');
errorDiv.textContent = '';
resultsDiv.style.display = 'none';
if (vitamin && formId && !isNaN(dose) && dose > 0) {
const vitaminInfo = vitaminData[vitamin];
const form = vitaminInfo.forms.find(f => f.id === formId);
if (!form) {
errorDiv.textContent = 'An error occurred. Please re-select the vitamin form.';
return;
}
// Convert the dose to mg for a standardized calculation
let doseInMg = dose;
if (unit === 'mcg') {
doseInMg = dose / 1000;
} else if (unit === 'IU') {
if (!form.conversion || !form.conversion.IUToMg) {
errorDiv.textContent = `IU to mg conversion is not available for ${form.name}.`;
return;
}
doseInMg = dose * form.conversion.IUToMg;
}
const elementalPercentage = form.percentage;
if (typeof elementalPercentage !== 'number') {
errorDiv.textContent = `Calculation for "${form.name}" is not available due to missing data.`;
return;
}
const elementalAmount = doseInMg * elementalPercentage;
document.getElementById('elemental-vitamin-result').textContent = elementalAmount.toFixed(3) + ' mg';
resultsDiv.style.display = 'block';
const rdaResults = document.getElementById('vitamin-rda-results');
rdaResults.innerHTML = '';
vitaminInfo.rdaGroups.forEach(group => {
const rdaValue = group.rda;
let rdaUnit = vitaminInfo.rdaUnit; // Use the unit specified in the data
// Convert RDA to mg for comparison
let rdaInMg = rdaValue;
if (rdaUnit === 'mcg') {
rdaInMg = rdaValue / 1000;
} else if (rdaUnit === 'IU') {
// All IU vitamins need conversion data to be compared to mg
if (!vitaminData.d.forms[0].conversion.IUToMg) {
console.error("Critical conversion data missing for Vitamin D");
return;
}
// For simplicity, we use Vit D conversion as a proxy if others are missing.
// A more robust system would ensure every IU vitamin form has this data.
const convFactor = form.conversion?.IUToMg || vitaminData.d.forms[0].conversion.IUToMg;
rdaInMg = rdaValue * convFactor;
}
const percentage = (elementalAmount / rdaInMg) * 100;
const row = document.createElement('tr');
row.innerHTML = `
<td>${group.name}</td>
<td>${rdaValue} ${rdaUnit}</td>
<td>${percentage.toFixed(1)}%</td>
`;
rdaResults.appendChild(row);
});
} else {
errorDiv.textContent = 'Please select a vitamin, form, and enter a valid dose.';
}
});
</script>
</body>
</html>