Nutritional Advice for Vegans and Vegetarians

Published on

Vegetarian and vegan diets are becoming increasingly popular. But for those who choose to adopt these type of plant-based diets, it is important to do so safely.

Nutritional Guidelines

The Eatwell Guide, which is the evidence-based healthy eating guide used in the UK, can be followed by those on a plant-based diet as it includes alternative options for meat such as: beans, pulses, and ‘other proteins’ (including tofu, mycoprotein etc.); and dairy alternatives such as soya milk. 

Healthy eating advice still applies vegetarians and vegans.

For example, it is still important to aim for at least 5 portions of fruit and vegetables per day, to include starchy carbohydrates at each meal (preferable wholegrain versions), to get enough protein and calcium, and to limit foods which are high in saturated fat, salt and sugar. 


Image reference: 


 ‘The Vegan Plate’ is a more specific guide for vegans to follow.

This was created by two dietitians called Brenda Davis and Vesanto Melina for The Vegan Society

This highlights a variety of vegan-friendly calcium and protein sources, and emphasises the role of: nuts, seeds, beans, lentils and chickpeas in a balanced vegan diet.

It also highlights how important it is to get enough vitamin D, vitamin B12, iodine and omega-3 fat; and mentions that supplements are usually needed by vegans to achieve this.



Image reference:

Important Nutrients For Vegetarians and Vegans

Cutting out food groups runs the risk of causing nutritional deficiencies.

But vegetarian and vegan diets can be well balanced, as long as they include all of the following nutrients in healthy amounts.


  • Growth
  • Repair
  • Wound healing
  • Used in hormone and enzyme production
  • Used in cell signalling
Food Sources:
  • Tofu
  • Mycoprotein (e.g. Quorn)
  • Soya protein
  • Seitan and wheat protein
  • Pea protein (e.g. Beyond Meat products)
  • Beans and lentils
  • Nuts and seeds
  • Eggs and dairy*
Additional info: Aim for 2 – 3 portions of these foods per day. Check out this post for more information about vegetarian sources of protein. 


  • Bone development
  • Bone health
  • Blood clotting
  • Healthy teeth
  • Healthy muscles
Food Sources:
  • Fortified dairy alternatives (e.g. soya or nut milks and yoghurts)
  • Calcium fortified juice drinks
  • Tofu
  • Green leafy vegetables
  • Dried fruit
  • Beans, lentils and chickpeas
  • Nuts and seeds (especially sesame seeds and tahini)
  • White and brown bread
  • Tinned fish (with bones)*
Additional info: Aim for 3 portions of these foods per day.


  • Transporting oxygen around our body
  • Storing oxygen in muscle
  • Healthy immune system
  • Enzyme function
Food Sources:
  • Beans
  • Nuts and seeds (especially sesame seeds)
  • Wholegrains
  • Iron fortified breakfast cereals
  • Yeast extract
  • Dried fruit
  • Green leafy vegetables (like kale, spinach and watercress)
  • Eggs, fish and poultry*
Additional info: To increase iron absorption, include sources of vitamin C along with meals containing iron (e.g. fruit, vegetables, fruit juice).


  • Thyroid health
  • Reproductive health and fertility
  • Healthy development of a foetus  
Food Sources:
  • Iodised salt
  • Fortified plant based milks e.g. M&S oat drink and Alpro soya milk
  • Seaweed**
  • Dairy products and seafood*
Additional info: Vegans may need to consider taking an iodine supplement.  


  • Acts as an antioxidant in our body
  • Important for reproduction
  • Important for thyroid health
  • Used in DNA production
Food Sources:
  • Brazil nuts
  • Eggs and fish*
Additional info: One Brazil nut contains the daily selenium requirements for an adult.  


  • Important for immune health
  • Involved in creating DNA and protein
  • Important for growth for babies and children
  • Wound healing
  • Involved in taste and smell
  • Involved in digestion
Food Sources:
  • Whole grains
  • Breakfast cereals which were fortified with zinc
  • Nuts and seeds
  • Leafy vegetables
  • Root vegetables
  • Fermented soya like tempeh and miso
  • Beans
  • Poultry, shellfish, dairy and eggs*
Additional info: Soaking dried beans and rinsing them before cooking increases zinc absorption.  


Vitamin B12
  • Role in DNA formation
  • Keeping nerve and blood cells healthy
  • Preventing megaloblastic anemia
  • Converting food to energy
Food Sources:
  • Breakfast cereals and plant-based milks which are fortified with vitamin B12
  • Yeast products (like marmite and nutritional yeast)
  • Fish, eggs and dairy*
Additional info: Many supplements made for vegans contain vitamin B12.


Vitamin D
  • Absorption of calcium and bone health
  • Immune health
  • Muscle health
Food Sources:
    • Certain mushrooms which have been exposed to UV light
    • Fortified margarine and breakfast cereals
    • Dairy, egg yolks and oily fish (if these are eaten)
Additional info: The best source of vitamin D is sunlight or vitamin D supplements – most people who live in the northern hemisphere are advised to consider taking a 10μg of vitamin D per day from October – March.


  • Heart health
  • Brain and eye development in infants
  • Reducing inflammation
  • Neurological health
  • Possible role in treating depression
Food Sources:
  • Seaweed**
  • Chia seeds, linseeds/flaxseeds, hemp seeds
  • Walnuts and walnut oil
  • Soybeans and soybean oil
  • Rapeseed oil
  • Tofu
  • Bread and spreads which are fortified with omega 3
  • Eggs and dairy which are fortified with omega 3*
  • Oily fish*
Additional info: Those who don’t eat fish, can use omega 3 supplements which are made from algae, but it is not currently clear whether these are beneficial to take.

Table references: The Manual of Dietetic Practice (5th Edition, 2014 – table A2.1 p. 923), ‘The Vegan Plate’ by Davis & Melina, BDA Food Fact Sheet ‘Vegetarian Diets’

*for vegetarians who include these foods in their diet (e.g. pescatarians, demi-vegetarians and flexitarians)

** Seaweed is not recommended more than once per week as it can provide an excessive amount of iodine.  

Fortified Foods & Supplements

In most countries it is becoming easier for vegetarians and vegans to eat a balanced diet, as there are more nutritious types of plant-based foods becoming available.

For example, most soya and nut milks are fortified with calcium, vitamin B12 and vitamin D, and some are also starting to fortify with iodine as well (so it’s best to check the labels).

There are also new types of plant-based meat alternatives emerging, like the Impossible Burger which has been designed in a lab to be very similar to meat, even though it contains only plant-based ingredients. You can check out this post and video for more information about this, and other meat alternatives for vegetarians and vegans. 

Although it is usually better to get all the nutrients we need from our diet, supplements can be useful for some people who follow plant-based diets.

This depends on how restrictive the diet is. For example, vegans often need to supplement with: vitamin B12 and iodine. Vegan-friendly omega 3 supplements made from algae are available, however omega 3 supplements have not been found to have the same heart healthy benefits as eating oily fish. For more information, here is a post I wrote for The Food Medic’s educational hub about omega-3 fats.

And everybody in the UK over the age of one, including pregnant and breastfeeding women, are advised to consider taking a daily supplement containing 10 mcg of vitamin D, especially from during the winter months (October – March).

Pregnant women, breastfeeding women, babies and young children who follow a plant-based diet are more likely to need certain supplements.

For example, on top of the standard advice for children from 6 months to 5 years to have a daily vitamin supplement containing vitamins A, C and D (unless having >500ml of infant formula per day), infants and children on vegan diet may need more diet planning and supplementing with vitamin B12 and iodine (ensuring less than 200 micrograms of iodine per day is given). For more information about this, see the ‘Eating well: vegan infants and under-5s’ advice from First Steps Nutrition, and if in doubt you can ask your GP to refer you and your child to a Paediatric Dietitian.

But it is important not to take very high doses of supplements, or to take multiple supplements which contain the same vitamins or minerals.

high quality study from 2012 found no evidence that antioxidant supplements reduced the risk of diseases, and in fact taking vitamin E and high doses of vitamin A was associated with a higher risk of early death. 

More Information on Vegetarian & Vegan Diets:


Maeve has been consulting on The Food Medic Educational Hub for 12 months now and has been a huge asset to the team. Her ability to translate some very nuanced topics in nutrition into easy-to-follow, informative articles and infographics is really admirable.

Dr Hazel Wallace

Founder of The Food Medic

Maeve is incredibly talented at sharing scientific information in an easy to understand way. The content she shares with us is always really interesting, clear, and of very high quality. She’s one of our favourite writers to work with!

Aisling Moran

Senior UX Writer at Thriva Health

Maeve has written extensively for NHD magazine over the last few years, producing a wealth of dietetic and nutritional articles. Always evidence based and factual, Maeve creates material that is relevant and very readable. She provides high quality work with a professional and friendly approach. Maeve is a beacon of high quality knowledge and work within the nutrition writing community; and someone NHD magazine is proud to work with.

Emma Coates

Editor of Network Health Digest

Support Dietetically Speaking

More from Dietetically Speaking

Vitamins for Vegans

Vitamins for Vegans

This article was written by Zachary Wenger, who is a dietetic student and a vegan. As a follow-up to our previous …
Daal Recipe

Daal Recipe

This recipe was created by my partner Anthony O'Neill — it is DAAL-icious so I hope you enjoy it as …
Is Protein Intake an Issue for Vegans?

Is Protein Intake an Issue for Vegans?

This article was written by Dietetically Speaking’s intern Zachary Wenger. Zack is a Student Dietitian and a Vegan himself. Protein might …
Can Type 1 Diabetes Management Contribute to an Eating Disorder?

Can Type 1 Diabetes Management Contribute to an Eating Disorder?

This guest post was written by Eloize Kazmiersky. Eloize graduated has a BSc Nutrition degree from the University of Nottingham …
Your No-Nonsense Guide to Eating Well

Your No-Nonsense Guide to Eating Well

I am SO excited to tell you about this book which I have just released!I was inspired to write Your No-Nonsense …
The Pros and Cons of Low-Carb Diets

The Pros and Cons of Low-Carb Diets

This guest post was written by Dr Harriet Holme (MA Hons Cantab, MBBS MRCPCH, PhD, RNutr). Harriet studied medicine at …
Does Green Tea Live Up To The Hype?

Does Green Tea Live Up To The Hype?

This article was written for NHD magazine, and was published in the February 2020 edition. Green tea is often touted as …
COVID-19 Diet Claims Debunked

COVID-19 Diet Claims Debunked

This article was written by Dietetically Speaking's intern Zachary Wenger. COVID-19 is a respiratory illness that can spread from person to …
Tomato Noodle Soup Recipe

Tomato Noodle Soup Recipe

This recipe is inspired by a delicious tomato broth ramen dish I had when I was living in Fukuoka in …
Is Organic Food The Healthier Option?

Is Organic Food The Healthier Option?

This article was first published in the December 2019/January 2020 edition of NHD Magazine. ‘Organic’ is a common buzzword …
Liquid Diets

Liquid Diets

This article was first published in the December 2019/January 2020 edition of NHD magazine. Liquid diets and meal replacements come …
Tofu, Sweet Potato & Veg Satay

Tofu, Sweet Potato & Veg Satay

This delicious vegan satay serves: 4-5 people. Ingredients: 1 large onion1-2 cloves of garlic1 tbsp rapeseed oil 2 medium sweet potatoes1 block …