Running places repetitive physical stress on the body, increasing demand for specific nutrients involved in energy production, muscle contraction, joint integrity, and immune health.
Yet research shows many Canadian adults fall short on key vitamins and minerals, deficiencies that can directly affect training quality and recovery.1
The best supplements for runners are those that address common nutrient gaps while supporting energy, muscle function, joint health, and cardiovascular resilience.
This guide explains which supplements matter most, why they’re important for runners, and how to choose them based on evidence.
Choosing the Best Vitamins for Running
The best vitamin supplements for runners include vitamin D, vitamin C, vitamin A, B-complex vitamins, and iron. These nutrients are commonly under-consumed and directly involved in performance.
Common Vitamin Gaps in Canadian Adults1
Nutrient inadequacy occurs when usual intake falls below levels required to support normal physiological function.
| Essential Nutrient | % of Canadian Adults with Inadequate Intake1 |
|---|---|
| Vitamin A | 47% |
| Vitamin C | 29% non-smokers / 59% smokers |
| Vitamin D | 94% |
| Calcium | 44% |
| Magnesium | 45% |
Why this matters for training: Even mild deficiencies can reduce energy production, impair muscle contraction, and slow recovery — effects that are amplified with regular exercise.6
Running Increases Your Nutrient Needs
Increased training volume raises requirements for vitamins that:
- Convert food into usable energy
- Support oxygen delivery to muscles
- Maintain immune defenses during heavy training blocks
How Common Nutrients Impact Performance
- Vitamin D: Supports muscle strength, bone health, and injury prevention
- Vitamin C and A: Help maintain immune function during intense training3
- Magnesium: Required for normal muscle contraction, relaxation, and strength.4
- Iron: Critical for endurance and oxygen transport5
- B vitamins: Essential for carbohydrate, fat, and protein metabolism6
For runners training multiple times per week, a high-potency multivitamin can help close baseline gaps, especially during winter or high-stress periods.
Common Nutrient Deficiencies in Active Adults
Magnesium
A diet high in processed foods and low in whole grains and vegetables often lacks magnesium. Excess sweat loss, salt, caffeine, and alcohol increase magnesium loss.7
Low magnesium may contribute to:
- Fatigue
- Muscle soreness
- Sleep disturbances
- Reduced stress resilience
Best magnesium forms for runners:
- Magnesium bisglycinate for muscle relaxation and sleep
- Magnesium citrate for general repletion
Magnesium supplementation may support recovery, sleep, and training consistency, especially during high-volume phases.
Iron
Iron deficiency risk increases with:
- Vegetarian or low-iron diets5
- Digestive conditions5
- Chronic blood loss, such as heavy menstruation5
Persistent fatigue during training warrants blood testing before supplementation.5
The Best Joint Supplements for Runners and High-Impact Training
The best joint supplements for runners are collagen peptides and curcumin, which support cartilage integrity and help manage exercise-related inflammation.
Collagen
Cartilage relies heavily on collagen for structure and shock absorption. Repetitive impact can accelerate wear.8
A systematic review of 12 studies found collagen supplementation:
- Improved joint function9
- Reduced joint pain in recreational athletes9
Turmeric / Curcumin
Curcumin is a bioactive compound with anti-inflammatory properties.10 Research shows it may:
- Reduce joint pain11
- Perform similarly to NSAIDs without gastrointestinal irritation11
Runners experiencing joint discomfort may benefit from collagen for structural support and curcumin for inflammation control.
Nutrition Considerations During Gender-Affirming Hormone Therapy
Gender-affirming hormone therapy can alter biochemical markers that influence nutrient needs, cardiovascular risk, and exercise performance.
Research shows gender-affirming hormone therapy may affect several nutrition-relevant markers.12
- Creatinine: May increase with masculinizing therapy and decrease with feminizing therapy.12
- Potassium: Spironolactone can increase potassium retention.12
- Magnesium: Estrogen therapy is associated with lower magnesium levels,8 potentially affecting calcium balance and clotting risk.13,14
Quick Guide: How to Choose a Supplement to Support Your Training
| Nutrient / Supplement | Primary Benefit | Best For |
|---|---|---|
| Multivitamin | Covers nutrient gaps | General training support |
| Magnesium | Muscle relaxation, energy, sleep | Muscle soreness, stress |
| Iron | Oxygen transport, endurance | Fatigue, low ferritin |
| Omega-3 EPA/DHA | Heart health, inflammation | Cardiovascular support |
| Collagen | Joint integrity | Impact-related joint pain |
| Curcumin | Inflammation reduction | Joint pain management |
Key Takeaways
- Training increases nutrient demands, especially for energy, muscles, immunity, and joints.
- Magnesium, iron, vitamin D, and omega-3s are common nutrient deficiencies among short- and long-distance runners.
- Targeted supplementation, guided by diet and testing, can support safer, more effective training.
The best supplements for runners are those that close nutrient gaps, support recovery, and keep the body resilient kilometer after kilometer.
