Natural Immunity-Boosting Foods That Will Help You Stay Fit

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The dreaded cold and flu season is slowly approaching. It is a time when many amongst you have the tendency to fall ill. How can one bolster the defences against the germs that roam freely in your office, shopping malls and even in your home? Nutritionist Avni Kaul says proper hygiene maintenance such as washing your hands and face properly, eating nutritious foods along doing daily exercises all play a vital part in bolstering your immunity. Your overall lifestyle also has an important part to play in boosting your immunity. One should get the proper amount of sleep as well. In this article, top Nutritionist and Dietician from Delhi and Founder of NutriActivania Avni Kaul talks about natural immunity-boosting foods that will help you stay fit.

Citrus Fruits – Most people opt for vitamin C after they get a cold. This is because it helps build up your immune system. Vitamin C is known to increase the production of white blood cells. These are key to combating infections. Because your body does not produce or store vitamin C, you need daily vitamin C for continued health. Almost every citrus fruit is filled with vitamin C. Orange, lemon and grapefruits are some of the well-known sources of vitamin C.

Garlic – Garlic is found in almost every food in the world. It adds a slight zing to food and it’s a must-have for your health. Early civilizations identified its value in fighting infections. Garlic also helps lower blood pressure and slows the processing of the hardening of the arteries. Garlic’s immune-boosting qualities seem to come from a heavy concentration of sulphur-containing compounds called allicin.

Spinach – Spinach made this list not just because it is full of vitamin C. It is also packed with several antioxidants and beta carotene, which can increase the infection-fighting ability of your immune system. Spinach is healthiest when it is cooked as little as possible so that it retains its nutrients. Though, light cooking enhances its vitamin A and allows other nutrients to get released from oxalic acid.

Ginger – Ginger is another component many turn to after falling sick. Ginger can help decrease inflammation, which can aid reduce a sore throat and various inflammatory illnesses. Ginger may help decrease nausea. Ginger contains some heat in the form of gingerol, a relative of capsaicin. Ginger also helps decrease chronic pain and has cholesterol-lowering properties.

Turmeric – You might know turmeric as an important ingredient in many curries. But this bright yellow spice has also been used for centuries as an anti-inflammatory in treating both osteoarthritis and rheumatoid arthritis. Also, high concentrations of curcumin, which provides turmeric with its distinctive color can help reduce exercise-induced muscle damage.

Papaya – Papaya is a fruit loaded with vitamin C. You can get about 224% of the daily recommended amount of vitamin C from a single papaya. Papayas also have a digestive enzyme called papain that has anti-inflammatory effects. Papayas have good amounts of potassium, B vitamins, and folate, all of which are beneficial to your overall health.

Important Disclaimer & Medical Policy

This content is for informational and educational purposes only. It does not constitute medical or dietary advice. Please consult Dietician Avni Kaul or a qualified healthcare professional before making any changes to your diet or nutrition plan.

Picture of  Written by Avni Kaul

Written by Avni Kaul

I am Avni Kaul, a nutritionist & Best Dietitian In Delhi with a B.Sc. and M.Sc. in Food and Nutrition from the University of Delhi, and 12 years of experience, including my work at Max Hospital’s Endocrinology Department as a Dietitian and Diabetes Educator. In 2018, I started my clinic, Nutri Activania in Saket, New Delhi, specializing in women’s health, including pre-conception, pregnancy nutrition, postpartum recovery, and hormonal conditions like PCOS, fertility, menopause, and endometriosis.

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When looking for someone to help you through your health journey, I think it is very important that the people who are guiding you do not approach it with any judgement. That is one of the best things I find about Avni & her team. They don't make food your enemy but rather teach you how to do it right, spending a lot of time in understanding your likes and dislikes and really personalising it to your need. You can be sure that you are being looked after individually. Alongside that, they also offer is a wealth of knowledge but also a delicate approach towards your journey. This is the main reason why I would recommend Avni to everyone.
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I really like the services provided by Avni and her team. She and her team make sure that my preferences are accommodated into the diet they provide. They provide a specifically tailored plan that works around my daily routine and helps me achieve overall results. Highly recommend Avni and her services.
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In March 2025, I had a scare with a sudden spike in my sugar levels. That was my wake-up call—I knew it was time to take my health seriously. I wasn’t looking for a quick fix but a long-term, sustainable lifestyle change. That’s when a close friend introduced me to Avni and NutriActivania. I reached out to Avni, and we discussed my goals and what I hoped to achieve. She and her team immediately put together a plan tailored specifically for me. The best part was how flexible it was—no drastic cuts, no extreme measures. Instead, they focused on equipping me with the skills and habits I needed to make lasting lifestyle changes. They listened to what worked for me, especially in terms of food preferences, and built a plan around my life rather than expecting me to adjust to theirs. That level of customization is what made it easy for me to stay committed. Each week, they share a personalised food plan and always check in before finalizing it. Avni has been incredibly supportive—always available to answer questions and consistently encouraging me to stay on track. Over the last seven months, I have lost 9 kgs. My sugar levels are back to normal, my cholesterol has dropped, and most importantly, I feel healthier. I eat better, and I am far more mindful about what I consume. I truly believe they’ve given me the tools to make better choices and have been instrumental in helping me reshape my lifestyle. Thank you, Avni and team. Thank you for being part of my journey and for helping shape it in the best way possible.
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During my first pregnancy, I was worried because I didn’t know how to give proper nutrition to my baby. Someone suggested Nutritionist Avni Kaul, so I joined her program and followed her diet plan throughout my pregnancy. She gave me a healthy meal plan that also allowed me to enjoy the foods I liked. My baby girl was born healthy and at a good weight. After pregnancy, I struggled with my weight, so I joined Avni Kaul’s post-pregnancy weight loss program. My weight went from 65 kg to 56 kg. I truly thank Nutri Activania and Nutritionist Avni Kaul for their support and guidance during my pregnancy and weight loss journey.
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’ve been consulting Dietician Avni Kaul at Nutriactivania, and I’m genuinely seeing positive changes in myself. Her guidance is very practical, easy to follow, and tailored exactly to my routine. She always checks in, motivates me, and explains everything clearly. My energy levels have improved, my eating habits feel much more balanced, and I’m gradually seeing visible results in my weight and overall health. I really appreciate her support and expertise. Highly recommended!
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