What Are the 13 Vitamins in Order? 🔢

What are the 13 vitamins in order? They are vitamins A, C, D, E, and K, followed by the eight B vitamins: B1 (thiamin), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6, B7 (biotin), B9 (folate), and B12. That’s the full set of essential vitamins—not a tidy A-to-M alphabet parade.

The B-vitamin sequence skips numbers because some early “vitamin B” candidates were later found not to be vitamins, or were grouped with other nutrients. We’ll sort out the numbering, explain what each vitamin does, and show where to find them in everyday foods. For the full guide, see 🧬 What Are the Vitamins in Order? The 13 Essential Secrets (2026).

Key Takeaways

• There are 13 recognized essential vitamins: A, C, D, E, K, and eight B vitamins.
• The B vitamins aren’t numbered consecutively because some substances once labeled as B vitamins were reclassified or turned out not to qualify.
• Vitamins have different jobs: they support processes such as vision, energy metabolism, blood cloting, immune function, and healthy bones.
• Food is the best starting point for meeting vitamin needs; supplements are useful for some people, but the right choice depends on diet, health, and life stage.
• More isn’t always better: high doses of certain vitamins can cause harm or interact with medicines.

Table of Contents

• ⚡️ Quick Tips and Facts: The 13 Essential Vitamins
• 🧭 What Counts as a Vitamin? A Quick Guide to Essential Nutrients
• 📜 How the 13 Vitamins Were Identified
• 🔢 What Are the 13 Vitamins in Order?
• 1. Vitamin A: Vision, Skin, and Immune Health
• 2. Vitamin B1 (Thiamin): Energy Metabolism and Nerve Function
• 3. Vitamin B2 (Riboflavin): Energy Production and Cell Growth
• 4. Vitamin B3 (Niacin): Metabolism, Skin, and Nervous System Support
• 5. Vitamin B5 (Pantothenic Acid): Making Energy and Hormones
• 6. Vitamin B6 (Pyridoxine): Brain Chemistry and Protein Metabolism
• 7. Vitamin B7 (Biotin): Nutrient Metabolism and Hair-Health Claims
• 8. Vitamin B9 (Folate): Cell Growth and Pregnancy
• 9. Vitamin B12 (Cobalamin): Red Blood Cells and Nerve Health
• 10. Vitamin C: Collagen, Antioxidant Activity, and Iron Absorption
• 11. Vitamin D: Bone Health, Calcium, and Sunlight
• 12. Vitamin E: Antioxidant Protection and Cell Membranes
• 13. Vitamin K: Blood Cloting and Bone Health
• 🍽️ Vitamin Food Sources: What to Eat for Each Essential Vitamin
• 📊 Vitamin Recommendations: Daily Needs by Age and Life Stage
• Recommended Dietary Allowances and Adequate Intakes
• Vitamins During Pregnancy, Breastfeeding, and Older Age
• 🧩 Fat-Soluble vs. Water-Soluble Vitamins
• 💊 Vitamin Supplements: When You May Need Them
• Multivitamins, Single Vitamins, and B-Complex Supplements
• How to Read a Supplement Label
• ⚠️ Vitamin Deficiency: Signs, Causes, and Who Is at Risk
• 🚨 Side Effects, Upper Limits, and Vitamin Toxicity
• 🔄 Vitamin Interactions With Medicines and Nutrients
• 🛒 Choosing and Storing Vitamins Safely
• 🖼️ At-a-Glance Vitamin Chart and Visual Guide
• ✅ Conclusion: Remembering the 13 Essential Vitamins
• 🔗 Recommended Links
• ❓ FAQ: Common Questions About the 13 Vitamins
• Are there really 13 essential vitamins?
• Why are the B vitamins not numbered consecutively?
• Which vitamins should I take every day?
• Can food provide all 13 vitamins?
• Which vitamins can build up in the body?
• Do vitamins provide energy?
• 📚 Reference Links

Table of Contents

• ⚡️ Quick Tips and Facts: The 13 Essential Vitamins
• 🧭 What Counts as a Vitamin? A Quick Guide to Essential Nutrients
• 📜 How the 13 Vitamins Were Identified
• 🔢 What Are the 13 Vitamins in Order?
• 1. Vitamin A: Vision, Skin, and Immune Health
• 2. Vitamin B1 (Thiamin): Energy Metabolism and Nerve Function
• 3. Vitamin B2 (Riboflavin): Energy Production and Cell Growth
• 4. Vitamin B3 (Niacin): Metabolism, Skin, and Nervous System Support
• 5. Vitamin B5 (Pantothenic Acid): Making Energy and Hormones
• 6. Vitamin B6 (Pyridoxine): Brain Chemistry and Protein Metabolism
• 7. Vitamin B7 (Biotin): Nutrient Metabolism and Hair-Health Claims
• 8. Vitamin B9 (Folate): Cell Growth and Pregnancy
• 9. Vitamin B12 (Cobalamin): Red Blood Cells and Nerve Health
• 10. Vitamin C: Collagen, Antioxidant Activity, and Iron Absorption
• 11. Vitamin D: Bone Health, Calcium, and Sunlight
• 12. Vitamin E: Antioxidant Protection and Cell Membranes
• 13. Vitamin K: Blood Cloting and Bone Health
• 🍽️ Vitamin Food Sources: What to Eat for Each Essential Vitamin
• 📊 Vitamin Recommendations: Daily Needs by Age and Life Stage
• Recommended Dietary Allowances and Adequate Intakes
• Vitamins During Pregnancy, Breastfeeding, and Older Age
• 🧩 Fat-Soluble vs. Water-Soluble Vitamins
• 💊 Vitamin Supplements: When You May Need Them
• Multivitamins, Single Vitamins, and B-Complex Supplements
• How to Read a Supplement Label
• ⚠️ Vitamin Deficiency: Signs, Causes, and Who Is at Risk
• 🚨 Side Effects, Upper Limits, and Vitamin Toxicity
• 🔄 Vitamin Interactions With Medicines and Nutrients
• 🛒 Choosing and Storing Vitamins Safely
• 🖼️ At-a-Glance Vitamin Chart and Visual Guide
• ✅ Conclusion: Remembering the 13 Essential Vitamins
• 🔗 Recommended Links
• ❓ FAQ: Common Questions About the 13 Vitamins
• Are there really 13 essential vitamins?
• Why are the B vitamins not numbered consecutively?
• Which vitamins should I take every day?
• Can food provide all 13 vitamins?
• Which vitamins can build up in the body?
• Do vitamins provide energy?
• 📚 Reference Links