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Debunking a Plant-Based Diet


The health sphere holds many conflicting opinions over plant based diets, with some touting it the fountain of youth or the cure to cancer, whilst others remain fearful of near-certain malnourishment. So, what’s the truth? This blog aims to tackle some of the most common misconceptions held.

Myth: A vegan diet is always healthy.

To begin, let’s clarify the difference between veganism and plant based diets.

Veganism stems from a moral belief that is usually held for reasons of animal rights or environmental concern, in which one abstains from consuming or using any animal products; this includes eating meat, dairy, eggs, fish, and even honey.

A strictly whole-foods, plant-based (WFPB) diet happens to be suitable for vegans, as it is composed solely of unprocessed plant based food groups, including fruit, vegetables, legumes, whole grains, nuts and seeds.

A person may choose a WFPB diet solely for health reasons, or as a healthy choice to support their ethical vegan lifestyle. Vegan diets do not necessarily have to be health promoting, in fact technically speaking you could eat a diet composed of nothing but French fries, Coca Cola and Vegan Magnums and call yourself a Vegan. A vegan diet specifies what’s removed from the diet, whereas a WFPB diet focuses on all the healthy foods included in it.

For the sake of this article, when discussing the health implications of a ‘vegan diet’, I am referring toWFPB diets.

Whole food plant-based diet

Myth: Vegans are all skinny and malnourished.

Whilst the majority of people are concerned with losing weight these days, it is often considered that vegans might be underweight due to nutritional inadequacies in their diet. Whilst neither following a vegan nor omnivorous diet can entirely determine whether somebody is under or overweight, looking at large population studies on vegans shows a remarkable trend.

In the Adventist Health Study-2, comprised of 22,434 men and 38,469 women, mean BMI was seen to be lowest in vegans (23.6 kg/m2) and incrementally increased as diets included higher amounts of animal foods, with non-vegetarians holding a mean BMI of 28.8 kg/m2. In this study population, who held many similar lifestyle habits, such as regular exercise, abstinence of coffee and alcohol, and an inclination towards healthy eating, with non-vegetarians eating relatively low-meat diets, the vegans were in fact the only group who fell into the normal BMI bracket.1

The EPIC-Oxford study which compared 37,875 ethical vegans, vegetarians, pescatarians and meat-eaters also found the vegans to have the lowest mean BMI of all groups, again falling into the healthy normal range. The meat eaters in this study were relatively health conscious, consuming a daily average of 18.8g of fibre versus the vegan’s 27.05g of fibre, thus indicating that their diets contained a substantial amount of plant matter, and they were not simply gorging on McDonalds every meal.2 It is to be noted that the vegans included in this study did not appear to be following an optimal diet, since a WFPB diet would typically include between 40-50g/fibre a day.3 Still, at all ages vegans had a lower BMI than the meat eaters by 1-2kg/m2.  The less striking differences between dietary groups compared to the Adventist Health Study-2 may be attributable to the latter vegan group consuming a much healthier diet than the Oxford vegan group; with an average of 46.7g of daily dietary fibre indicating a far greater consumption of unprocessed plant foods.2,4

In fact, more than twenty studies have shown vegans to be leaner than other dietary groups, with lower BMIs and lower body fat percentages.5

We may wonder whether the lower BMIs are attributable to starvation on the part of the vegan groups; perhaps eating nothing but plant foods inevitably leads to calorie restriction? A 2017 randomised controlled trial put 33 overweight or obese patients on a WFPB diet and concluded that this research achieved greater weight loss at 6 and 12 months than any other trial which does not limit energy intake or mandate regular exercise. At twelve months, mean reduction in BMI for the WFPB group was an extraordinary 4.2 (±0.8) kg/m2 BMI points.6

What conclusions can we take from these findings? It appears that whilst a vegan diet may not be associated with being underweight, it might well be protective against the sweeping trend towards obesity.

Myth: Animal protein is necessary for human health.

Due to decades of industry advertising, most of us have been well and truly indoctrinated with the message that it’s necessary to eat animal products to live a long, healthy life. However, the American Dietetic Association, the largest dietetic association in the world has a different opinion, stating that “appropriately planned vegetarian diets, including total vegetarian or vegan diets, are healthful, nutritionally adequate, and may provide health benefits in the prevention and treatment of certain diseases.”7

It seems increasingly major bodies are recognising both the adequacy and the advantages of a plant-based diet for us, and the environment. We can even see Canada going as far as removing the dairy group from their 2019 Food Plate, and offering the advice to “Choose protein foods that come from plants more often.” 8

The World Health Organisation asks that we decrease our consumption of saturated fats (largely found in animal foods, aside from tropical plants such as coconut) and increase consumption of “fruits and vegetables, and legumes, whole grains and nuts”.The UN goes as far as calling meat “the world’s most urgent problem” from the perspective of climate change, and praises those developing plant-based alternatives.10

So, what health benefits might expect to see on a strictly plant based diet? Looking again at the Seventh Day Adventists, we can see that the vegan group experienced a 15% lower overall mortality rate compared to meat eaters, with vegetarians and vegans enjoying lower risk of hypertension, type 2 diabetes, obesity, cardiovascular disease and certain cancers.11

Myth: Milk is the only source of calcium.

Milk is absolutely not the only source of calcium, nor is it necessarily optimal for human health. Great plant based sources of calcium include broccoli, collard greens, tahini, legumes, nuts and seeds.

Plant-based calcium

In the EPIC-Oxford Study, a 30% increase in bone fractures were seen in the vegan group compared to other dietary groups. However, around 45% of these vegans had calcium intakes below 525mg per day, whilst less than 6% of those in other dietary groups had intakes this low. Whilst the current RDI for calcium in Australia is around 1000mg for adult men and women (increasing during pregnancy and over 50 years old in women), when only vegans meeting 525mg per day of calcium or above were included, fracture rates were the same as for meat eaters, and actually slightly lower than in fish eaters and vegetarians.12  This highlights the importance of following a well-planned WFPB diet.

Calcium is far from the only nutrient involved in bone health; consult with a holistic health practitioner, such as myself, or dietitian to learn more.

Myth: Iron Deficiency Anaemia is inevitable.

One of the most common stereotypes of a vegan or vegetarian seems to be that they’re universally anaemic due to a red-meat deficiency. Whilst from personal observation, I can report that women of all dietary preferences frequently struggle with maintaining optimum iron levels, it is important to understand how to optimise iron intake on a plant based diet.

It is true that non-haem iron (that found predominantly in plant matter) is less well absorbed than the haem iron (found predominantly in animal matter). (N.B. I say predominantly as there are now vegan burgers containing haem extracted from the roots of soy plants.) However, whilst better absorbed, haem iron may act as pro-oxidant, increasing oxidation of LDL cholesterol and consequently atherosclerosis. High iron intakes and excess iron in the body have also been associated with Alzheimer’s, Parkinson’s diseases, arthritis, Type 2 DM, colorectal and other cancers.13,14

Non-haem iron absorption is better regulated by the body, with increased absorption taking place when iron levels are low and vice versa.15,16

With our typical Western lifestyles, it is important to realise that our tea and coffee consumption is deleterious to iron absorption, and these should be enjoyed away from our meals. Vitamin C rich foods can increase non-haem iron absorption by up to 6x and should be enjoyed with every meal; this could include squeezing lemon or lime on your food, including berries with your oatmeal, or eating capsicum with your tofu salad.3,16  Consuming onions and garlic with grains or legumes can even increase the availability of iron and zinc considerably.17  Legumes are a wonderful way to increase iron intake, with their non-haem ferritin iron shown to be highly absorbable.18

Due to the difference in absorption of non-haem iron, the amount of iron vegans should aim for is actually higher than the typical RDI, with vegan dietitian Brenda Davis proposing 25mg of iron as a healthy target when taking into account both promoting and inhibiting dietary factors.

Myth: A vegan diet will take care of itself.

Whilst a well-planned vegan diet is undoubtedly adequate and even promoting of good health, if you don’t know what you’re doing, you can easily run into a few problems. I should know, as I made almost every mistake in the book when I first made my transition from an omnivorous diet onto a vegan diet. It is really important to understand where you’re getting your protein, iron, zinc, calcium, B12, Omega 3, iodine and everything else. There are so many examples of bad-vegan diets to follow on the internet; ones which are not remotely nutritiously adequate and bound to lead to all sorts of problems in the long run. Just because you see an Instagram model promoting nothing but drinking green juice all day long, does not mean this is healthful. These diets are not going to be sustainable for your health, and you won’t be doing the vegan message any favours.

There are many wonderful resources to help, many of which will be linked to from my website in future blog posts. However, it is often best to get a bit of outside expert assistance, and there are some great dietitians or naturopaths (such as myself) out there who are very familiar with a vegan diet and can make sure you’re on the right track. With a bit of practice, there is no reason why you cannot enjoy excellent health on a vegan diet.

Happy healthy vegans vegetarians

Diet is not everything. I firmly believe that nutrition is one of the greatest tools we have to good health, but it is not everything. In Dean Ornish’s work where he documented incredible reversal of heart disease in his patients, halted prostate cancer growth and even telomerase extension, he used plant based diets in conjunction with lifestyle modifications; these included meditation, social support, and exercise.19,20,21  Nutrition is extremely important, but it’s best enjoyed alongside other health promoting lifestyle choices for optimum results.

Myth: B12 is not necessary to supplement

It is. Very necessary. Just because a few outliers have managed to avoid supplementation, does not mean this is true for the general population. Supplement- please.

Myth: Infants and children cannot be vegan.

There are certain times of life when the stakes are higher when it comes to health- these include during pregnancy, infancy and childhood. The American Dietetic Association is very clear in its position when it states that “Well-planned vegetarian diets are appropriate for individuals during all stages of the life cycle, including pregnancy, lactation, infancy, childhood, and adolescence, and for athletes.”22 The words I’d like to emphasise are “well-planned”; this does not mean you can remove animal products from the diet and just hope for the best. In a future article, I’ll go into more details over the potential benefits of a plant based diet for all stages of life; but for now, it is highly recommended that if you intend to raise your children on a plant based diet, that you consult with a plant based dietitian. A trained professional with a specialised knowledge of plant-based diets can ensure that you’re providing your children with everything they need to grow up healthy and strong.


  1. Tonstad S, Butler T, Yan R, Fraser GE. Type of vegetarian diet, body weight, and prevalence of type 2 diabetes. Diabetes Care. 2009;32(5):791-796. doi:10.2337/dc08-1886
  2. Spencer EA, Appleby PN, Davey GK, Key TJ. Diet and body mass index in 38 000 EPIC-Oxford meat-eaters, fish-eaters, vegetarians and vegans. Int J Obes. 2003;27(6):728-734. doi:10.1038/sj.ijo.0802300
  3. Davis B, Melina RD VM. Becoming Vegan: The Complete Reference to Plant-Based Nutrition (Comprehensive Edition). Summertown, Tennessee, USA: Book Publishing Company; 2014.
  4. Orlich MJ, Fraser GE. Vegetarian diets in the Adventist Health Study 2: a review of initial published findings. Am J Clin Nutr. 2014;100(suppl_1):353S-358S. doi:10.3945/ajcn.113.071233
  5. Mangels R, Messina V. The Dietian’s Guide to Vegetarian Diets: Issues and Applications. 3rd ed. Sudbury, MA: Jones and Bartlett Learning; 2010.
  6. Wright N, Wilson L, Smith M, Duncan B, McHugh P. The BROAD study: A randomised controlled trial using a whole food plant-based diet in the community for obesity, ischaemic heart disease or diabetes. Nutr Diabetes. 2017;7(3):e256-e256. doi:10.1038/nutd.2017.3
  7. Craig WJ, Mangels AR, American Dietetic Association. Position of the American Dietetic Association: vegetarian diets. J Am Diet Assoc. 2009;109(7):1266-1282. Accessed November 27, 2017.
  8. Government of Canada. Healthy food choices – Canada’s Food Guide. Published 2019. Accessed February 21, 2019.
  9. World Health Organization. Global Strategy on Diet, Physical Activity and Health. WHO. Published 2016. Accessed February 21, 2019.
  10. United Nations Environment Programme. Tackling the world’s most urgent problem: meat. Published 2018. Accessed February 21, 2019.
  11. Le LT, Sabaté J. Beyond Meatless, the Health Effects of Vegan Diets: Findings from the Adventist Cohorts. Nutrients. 2014;6:2131-2147. doi:10.3390/nu6062131
  12. Appleby P, Roddam A, Allen N, Key T. Comparative fracture risk in vegetarians and nonvegetarians in EPIC-Oxford. Eur J Clin Nutr. 2007;61(12):1400-1406. doi:10.1038/sj.ejcn.1602659
  13. Forouhi NG, Harding AH, Allison M, et al. Elevated serum ferritin levels predict new-onset type 2 diabetes: results from the EPIC-Norfolk prospective study. Diabetologia. 2007;50(5):949-956. doi:10.1007/s00125-007-0604-5
  14. Geissler C, Singh M. Iron, meat and health. Nutrients. 2011;3(3):283-316. doi:10.3390/nu3030283
  15. Collings R, Harvey LJ, Hooper L, et al. The absorption of iron from whole diets: a systematic review. Am J Clin Nutr. 2013;98(1):65-81. doi:10.3945/ajcn.112.050609
  16. Saunders A V, Craig WJ, Baines SK, Posen JS. Iron and vegetarian diets. Med J Aust. 2013;199(4 Suppl):S11-6. Accessed November 28, 2017.
  17. Gautam S, Platel K, Srinivasan K. Higher Bioaccessibility of Iron and Zinc from Food Grains in the Presence of Garlic and Onion. J Agric Food Chem. 2010;58(14):8426-8429. doi:10.1021/jf100716t
  18. Theil EC, Chen H, Miranda C, et al. Absorption of iron from ferritin is independent of heme iron and ferrous salts in women and rat intestinal segments. J Nutr. 2012;142(3):478-483. doi:10.3945/jn.111.145854
  19. Ornish D, Scherwitz LW, Billings JH, et al. Intensive Lifestyle Changes for Reversal of Coronary Heart Disease. JAMA. 1998;280(23):2001. doi:10.1001/jama.280.23.2001
  20. Ornish D, Weidner G, Fair WR, et al. Intensive lifestyle changes may affect the progression of prostate cancer. J Urol. 2005;174(3):1065-1070. doi:10.1097/01.ju.0000169487.49018.73
  21. Ornish D, Lin J, Chan JM, et al. Effect of comprehensive lifestyle changes on telomerase activity and telomere length in men with biopsy-proven low-risk prostate cancer: 5-year follow-up of a descriptive pilot study. Lancet Oncol. 2013;14(11):1112-1120. doi:10.1016/S1470-2045(13)70366-8
  22. Melina RD VM, Craig MPH WR, Levin RD CSSD SM. FROM THE ACADEMY Position of the Academy of Nutrition and Dietetics: Vegetarian Diets. J Acad Nutr Diet. 2016;116:1970-1980. doi:10.1016/j.jand.2016.09.025

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I cant ´t describe how grateful I am to have got in contact with Camilla! She really has an amazing knowledge about the... body and how it all works together on a different level than anyone I´ve ever worked with. I came to her to get help with my headaches, migraines and fatigue after years and multiple visits/treatments with different doctors, experts etc. without any luck. Instead of just recommending me a "quick-fix", she worked with me to find the underlying issues.I've been working with her for a couple of months now and she never fails to give me the highest quality treatment in all aspects. She is also super quick to respond to any question or concern I might have, which I really appreciate.She is also one of the kindest, sweetest and most understandable people you will ever meet. It is so comforting and calming to finally have found a person who truly cares about your health as she does (AND is vegan!!). I can´t recommend her enough!! Thank you Camilla :)read more
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02:02 06 Sep 21
Camilla has been absolutely amazing and I highly recommend her. She understands and respects my vegan dietary choices... which I have struggled with other doctors and naturopaths. She patiently listens and created a thorough treatment plan for me. I have been on the treatment plan for a few weeks now and my symptoms have greatly reduced and I’m already feeling much better. I’m highly impressed by her prompt response to my emails. She is very knowledgeable and helpful and has made my healing journey extremely comfortable.Thank you Camillaread more
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In the past, what I found difficult with doctors was the fact that they did not listen to me; they literally finished... the sentences on my behalf all the time, rushing a diagnosis!Camilla is such a great listener, she really took all the possible information from me, she studied my case meticolously and came up with a cure which makes a lot of sense...and she explained it to me! Some other practitioners just prescribe lots of things and do not even explain what is cointained in those supplements/herbs and what they are specifically for.I highly recommend Camilla to all the ones who want a "same-level" relationship which their practitioner and not a "yes, I trust you, you are the expert" kind of relationship.Thank you Camilla!read more
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I'm so glad I went to see Camilla, being vegan it's nice to find a naturopath who shares the same values.She asked me... a lot of questions during the initial consult, I felt that she was genuinely trying to help. After a few weeks and some tests done, she made a very detailed treatment plan which was very thorough and well explained.After only a few weeks following the treatment plan, the symptoms greatly improved as my gut health got better.I'd highly recommend Camilla as she has great knowledge combined with a caring and effective holistic more
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I truly wish I found Camilla earlier and I HIGHLY recommend her to anyone looking for a naturopath! I've been seeing... her for a few months now and I'm constantly impressed at how thorough, knowledgeable and passionate she is. I've had gut and hormonal issues for as long as I can remember, and from the get-go, I felt Camilla was truly invested in finding the underlying causes and helping me resolve them. She is also the warmest, kindest person - an absolute joy to work with.I've already seen such vast improvements in my health, and for the first time in my life, I'm confident that my issues can well and truly be resolved. I also really appreciate working with a fellow vegan who not only understands my values, but is equally passionate about them too.Thank you so much, Camilla! I cannot recommend her enough!read more
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Matt Gussin
16:41 22 May 21
I've had a pretty horrid time with gut and fatigue problems for over two years and in this time, I have seen countless... doctors, naturopaths, gastroenterologists, Chinese medicine practitioners and so on...Some of which told me to stop my vegan diet, so this was when I searched for a vegan Naturopath and found Camilla.Camilla has been nothing but outstanding since our first contact. She is the first person in my health journey who I feel is genuinely invested in my health and has worked tirelessly to help and provide answers. She is always quick to reply to my lengthy emails and although currently at the early stages of my treatment, every piece of advice and treatment given has been based off facts and logical reasoning.I really recommend Camilla. I have felt very comfortable with her from day one and you will get someone who is knowledgeable, passionate but most importantly, will do her utmost to help you through any more
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02:36 22 May 21
I would without a doubt recommend Camilla to anyone looking for a naturopath. She is so warm, caring, knowledgable and... helpful. I sought Camilla’s help to work on my severe PMS, heavy and painful periods and PTSD and mental health. From the moment I saw her she went above and beyond and is always there to help whenever I have any questions or concerns. I have just started my treatment plan and feel confident that I will see an improvement with my concerns.Thank you so much Camila xread more
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02:59 07 Apr 21
I have been working with Camilla for a couple of months now with the aim of treating and managing hair loss, stress,... and anxiety. Camilla's process is incredibly thorough and informative and it has been amazing to not only feel better, but learn SO much in the process. My treatment plan has been very manageable, and Camilla has always made sure I understand why we are doing things rather than just telling me. This ​has really helped me to feel more in control and kept me committed to the lifestyle changes. Prior to working with Camilla, I felt a pretty overwhelmed with information, none of which I could be certain was true or even relevant to my symptoms whereas Camilla's process is so personal, and completely tailored to the individual.Camilla has been so kind, and understanding and has made the whole experience as comfortable and easy as possible. I have been shocked by how quickly I began to feel positive changes, and cant wait to see them continue!read more
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02:45 04 Mar 21
Camilla is an incredible naturopath. I was recommended by a friend. I was struggling with my energy levels and needed... help to figure out why. The consults were thorough and in-depth and camilla made me feel super comfortable the whole way through.I had bloods done which confirmed i was low on iron as she had predicted. She wrote me an amazing in depth treatment plan, which included when and how to take my supplements with loads of tips & tricks on how to get the most out of them and include more into my diet. She also gave me loads of great recipes to cook to help with my iron intake.It has been over a month into treatment and i feel super energetic and full of life again. It was exactly what i needed to help get back to myself.I couldn’t recommend her enough. If you’re struggling with anything her in-depth knowledge in her field will help you.Thankyou more
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Camilla is very knowledgeable, helpful and has a wonderful nature. She’s caring and goes above and beyond to help. I... can’t recommend her enough. Thank you!read more
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Highly recommend. Camilla is a delight, very passionate and committed to getting clients back to their best!
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