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Vitamins like folic acid, A, B12, B6, C and D all support a healthy immune system, and your ideal daily intake depends on your body, your diet and even your sex. This guide breaks down what your immune system actually needs, why men and women don't always need the same amounts, and which supplements can help close the gap.
Vitamins do a lot more than most people realize, and one of their most important jobs is protecting the immune system. Getting enough of the right micronutrients starts with knowing which ones matter most. The vitamins that play the biggest role in immune health are folic acid, vitamin A, vitamin B12, vitamin B6, vitamin C and vitamin D.
Which vitamins are most important for a healthy immune system?
Folic acid, vitamin A, vitamin B12, vitamin B6, vitamin C and vitamin D all play a direct role in keeping the immune system working properly, so a diet or supplement routine that covers these nutrients is a solid starting point.
You can get all of these vitamins and minerals through a balanced daily diet. Another option, if you want to be sure you're covering your full requirements, is taking a complete multivitamin supplement.
Can I get all the vitamins I need from food alone?
A varied, balanced diet can cover most vitamin and mineral needs for many people, but busy schedules, restrictive diets or higher individual requirements can make it hard to hit every target, which is why some people choose to add a daily supplement.
Vitamin and mineral needs differ from person to person
Everyone is different: weight, height, age and sex all affect how much of each nutrient your body actually needs. So if we're all so different, why do so many people default to a one-size-fits-all multivitamin?
Generic multivitamins have been around for a long time, but nutrition research has moved on, and it's now clear that men and women often have distinct requirements for certain vitamins and minerals.
Do men and women need different amounts of vitamins?
Yes, requirements differ because of differences in body size, muscle mass and metabolic rate, so men generally need slightly more energy and B-group vitamins, while women often need more iron and calcium.
Men typically need a slightly higher daily energy intake than women to cover their metabolic demands, which is largely explained by greater average body and muscle mass. As a result, requirements for B-group vitamins (B1, B2, B6 and B12) tend to run a little higher for men.
Why do women need more iron than men?
Women lose iron through menstrual blood loss each month, which increases their dietary iron requirement compared with men of the same age. Bone-related conditions are also more common in women, which makes calcium and vitamin D particularly important.
Vitamin C: a cornerstone for immune support
Keeping your vitamin and mineral levels on track matters for everyone, and vitamin C is one of the easiest places to start. Among other functions, these micronutrients help your body:
- Take part in hundreds of metabolic reactions
- Support the health of your tissues
- Act as a powerful antioxidant
- Delay the onset of tiredness and fatigue
What does vitamin C do for immune health?
Vitamin C contributes to the normal function of the immune system and also acts as an antioxidant, helping to protect cells from oxidative stress. If you notice you feel weak or think you need more vitamins and minerals in your diet, it's worth checking in with a nutritionist.
The Vitamin C 500 mg tablets from JustLoading are a straightforward way to top up your daily intake if your diet falls short.
Collagen, magnesium and vitamin C together
Vitamin C doesn't just support immunity on its own — it also plays a role in how your body forms collagen, which is why the two are often combined in a single product. The Collagen, Magnesium and Vitamin C tablets from JustLoading bring these nutrients together to support joints, connective tissue and general wellbeing alongside immune health.
Can vitamin C be combined with collagen supplements?
Yes, vitamin C contributes to normal collagen formation, so it is commonly paired with collagen and magnesium in a single supplement to support skin, joints and overall connective tissue health.
What about marine collagen?
If you'd rather take your collagen as a powder, Marine Collagen powder mixes easily into water or a shake and is a popular way to support skin and joint health over time.
What is marine collagen used for?
Marine collagen is typically used to support skin elasticity, joint comfort and connective tissue, and it is often taken as a powder that dissolves easily in water or a shake.
When to ask a professional
Supplements can help fill the gaps in your diet, but they're not a substitute for professional advice if something feels off.
When should I consult a nutritionist about supplements?
If you feel persistently weak, tired or unsure whether your diet is covering your nutritional needs, it is worth reviewing your diet with a nutritionist before adding new supplements.
Want to learn more about sports nutrition and health? Check out the rest of the JustLoading Health blog and follow us on social media.
Remember: if you have any doubts about your particular case, speak to a healthcare professional. Food supplements are not a substitute for a varied and balanced diet.
