Your Body

2021 Diets

New year, new diets.


As we head into the festive period where most of us have the tendency to overindulge, many people will be looking into the best diets to try out in January 2021.


We have looked into the most popular diets of 2020, as well as predicting which diets are going to be big in 2021…


The most popular diets of 2020


Rank Diet Annual Searches
1 Keto diet 3,134,000
2 Intermittent fasting 1,593,500
3 Veganism 897,500
4 Vegetarianism 514,900
5 SlimFast 470,500
6 Mediterranean diet 424,700
7 FODMAP diet 390,500
8 Cambridge Diet 371,400
9 5:2 diet 308,500
10 Low carb diet 304,400



  • Keto Diet



The Ketogenic (Keto) Diet is the most popular diet of the year, with there being over 3 million (3,134,000) searches for the diet in the UK every year. On the Keto diet, you’ll need to focus on eating lots of protein and good fats, as well as a small amount of good carbohydrates.


The Keto diet involves an individual eating less than 35g of carbohydrates per day, replacing the carbohydrates with fats and placing the body into the state of ketosis. This is a metabolic state where cutting down on carbohydrates creates ketones in the liver, so that your body breaks down fat and uses this for energy, instead of carbs. 



  • Intermittent Fasting



Intermittent fasting was revealed as the second most popular diet of 2020, receiving over 1,593,500 searches a year. Intermittent fasting is an eating pattern where you cycle between periods of eating and fasting; the diet is thought to improve insulin resistance, which can stabilise blood sugar levels. 



  • Veganism



Veganism is a diet where the person does not consume any animal products, including fish, eggs and dairy products.


Searches for the vegan diet were recorded at 897,500 in the past year, with our recent survey revealing that 2.7% of Brits follow a vegan diet – that’s equivalent to around 1.8 million people! 


Diets gaining popularity as we move into 2021

To see which diets have been gaining popularity as 2020 draws to a close, and to predict which diets are going to be big in 2021, we’ve taken a look at the last three months of search terms to see which diets are rising in popularity.


Rank Diet Annual Searches Three-Month Change
1 Okinawa diet 11,420 46.00%
2 Veganism 897,500 39.18%
3 Soft food diet 11,440 30.43%
4 Nutrisystem diet 2000 23.81%
5 Subway diet 2170 21.43%
6 Ornish diet 2,790 14.71%
7 Pollotarian 7,860 14.29%
8 Pescetarianism 63,200 9.86%
9 Mucusless Diet 1,380 8.33%
10 Vegetarianism 514,900 0.00%


Veganism featured in the top three diets that are set to be the most popular in 2021, with a search increase of 39.18%. 


Also featuring in the top three diets gaining popularity as we head into the new year was the Okinawa diet, a diet which refers to the eating patterns of the people living on the Japanese island of Okinawa, and which searches for have increased by 46%. Their unique diet, which is low in calories and fat while high in carbs and which emphasizes vegetables and soy products, is credited for giving them some of the longest lifespans on the planet.  


The soft food diet followed in third place, with an increase of 30.43% in searches in the past three months. 


Diets losing popularity as we move into 2021


Rank Diet Annual Searches Three-Month Change
1 Kangatarian 11490 -97.17%
2 Morning banana diet 3,670 -91.49%
3 Werewolf diet 1190 -80.95%
4 Semi vegetarianism 3,340 -73.53%
5 MIND diet 17,880 -71.69%
6 Master Cleanse 23,000 -67.29%
7 Lemon detox diet 1970 170
8 Atkins diet 257500 33,100
9 Pritikin Diet 8,880 2,900
10 DASH diet 99,400 18,100


Amongst the diets that are decreasing in popularity included the Kangatarian diet (-97.17% decrease in searches), the Morning banana diet (-91.49%), and the Werewolf diet (-80.95%). 


Garden of Life

Garden of Life

Writer and expert