As a Dietician, These 5 diet “Rules” I Don’t Believe In Says Avni Kaul

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With several diet fads, marketing gimmicks, and information accessible through the click of a button, it can be challenging to decipher what advice to follow. Avni Kaul is a qualified nutritionist with a science degree who believes in evidence-based nutrition. Here are five diet ‘rules’ Dietician Avni Kaul does not believe in, backed by science.

  1. A detox will throw out toxins from the body.

No products will ‘detox’ or ‘cleanse’ your body. Your body is not holding or absorbing bad toxics otherwise you would be extremely ill. The human body has its own systems for ‘detoxing’; your lungs, kidneys, liver, and gastrointestinal tract do this for you.

No foods can detox your body however a well-balanced diet could help support a healthy gut microbe for digestion, help to improve sleep for recovery and support daily energy balance. Products that claim to ‘detox’ the body or give a ‘cleanse’ are marketing gimmicks.

  1. Eating healthy needs to be expensive.

You can eat a healthy, well-balanced diet within your budget. The biggest tip for this is to plan for the week ahead. Design a meal plan for the week and create a shopping list. A well-planned list will prevent you from overbuying and overspending.

It is essential to be aware of your product choices and look at brand comparisons. Look at frozen alternatives for some foods. Fresh and frozen fruit and vegetable have the same nutrition profile as frozen generally, half the price. Always go for what is in season and opt for home-brand options for your basics, for example 1kg of home-branded rice is lesser compared to the branded one.

  1. Cutting carbohydrates are crucial for reducing weight.

A low-carbohydrate diet is one of the oldest weight loss myths there is. It is not maintainable long-term and could have serious health effects. Carbohydrates are our body’s preferred source of energy. They hold water in your body, so when you cut carbohydrates your overall ‘weight’ on the scales could reduce, however, this is more so because of water loss.

When you reduce your carbohydrate consumption, you see a drop in energy levels, mood, libido, concentration, and sleep causing irritability and fatigue. Each meal should contain some kind of complex carbohydrate to help prevent this. The carbohydrates you want to consume in large amounts are fruits, vegetables, grains, legumes, and seeds while keeping your simple carbohydrates to a minimum; these are inclusive of pastries, confectionary, white bread, and rice.

  1. Low-fat or fat-free is the healthier choice.

Fats play a vital role in the body working as an energy source, supporting both brain and hormone function, the transport of vitamins and minerals, and heart health. Like anything, you want to consume fats in moderation and prioritize unsaturated fats over saturated or transaturated ones.  Your unsaturated fats (monounsaturated and polyunsaturated) could be present in olive oil, avocado, nuts, seeds, and oily fish.

  1. Eat healthy in the week to let for a cheat meal on the weekend.

You should not be waiting for the weekend to eat a ‘cheat meal’. Straight away this mindset could cause guilt and restriction. All food needs to be balanced and consumed in moderation for a healthy diet. It is fine to indulge in cravings when they happen (within reason). It is mostly seen that people frown on the idea of eating a pizza or a burger during the week, however it is acceptable during the weekend. The day of the week need not matter.

If you spend a week ‘waiting’ to eat your favorite meal, you are more likely to overeat or eat it even if you do not feel like it at the time. The advice is to prepare and plan your weeks, including a weekend but also try to listen to your body and think about the 80/20 method for a healthier balanced relationship with both food and your body.

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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Really grateful to Avni and the entire team for their guidance and support. The plan was easy to follow, practical, and delivered great results. Highly professional, motivating, and truly caring. I would strongly recommend them to someone looking for real and lasting change.
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Avni approaches nutrition and wellbeing in a genuinely scientific and highly customized way. Her knowledge is impressive, but what truly stands out is the personalized element—it's clearly not a rigid, one-size-fits-all plan. I really appreciate that the process is designed to be flexible and adaptable to individual preferences and lifestyles. Beyond the methodology, the attention to detail and the support system she sets up are exceptional. She ensures the journey of nutritional improvement doesn't feel weary or lonely. Loved the gamification elements which made the process fun while encouraging a focus on sustainable, long-term habits. Would definitely recommend!!
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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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Avni and team are really dedicated, just a call away, and available. Their diet plan is easy to follow and sustainable. Thanks a lot, And wish you the best!
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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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I visited Nutritionist Avni after struggling for months with low energy and irregular eating habits. She gave me a diet plan that was flexible, not restrictive, and I started feeling the difference in my energy levels within just a couple of weeks.

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