Raina Grover, the hair expert at the hair extensions brand 1 Hair Stop put 15 most well-known diets around the world to test, to study their impact on hair health and growth. She compiled the diets according to their Google search and popularity on TikTok and analysed how each fared in 4 key categories before delivering a final verdict on each.
Raina said..
“While some diets like the Mediterranean Diet promote healthy hair growth by providing essential nutrients, extreme diets such as the Keto, Liquid-only, and Carnivore diets can severely damage hair health. It’s important to choose a balanced approach to nutrition that nourishes your hair with the right vitamins, minerals, and healthy fats to maintain optimal growth.”
The 4 key categories are: Hair Growth Vitamins/Minerals, Protein-rich foods, Iron-rich foods, Healthy fats
The 15 diets were then rated as follows: Healthiest, Very Healthy, Moderately Healthy, Harmful for hair, Extremely Harmful for hair

Please find the full list of diets here
While the Mediterranean Diet is a clear winner in every category, proven to be the healthiest for hair. The experts’ revelation about the Gluten-free, Carnivore diet, Blue Zone diet, Macrobiotic diet, and more will surprise many. Some key revelations are mentioned below.
The Mediterranean Diet is Hair Experts’ No. 1 Pick
The Mediterranean Diet, ranked No.1 healthiest diet in the world for 7 years straight, is a godsend for those looking to lose weight while maintaining healthy hair and skin. It strikes a perfect balance between vegetable and meat consumption, thus containing all hair growth-related food groups in an appropriate amount.
No other diet, not even Keto and Carnivore Diet, searched 301,000 and 450,000 times per month in the past year (Google), brings forth the same results on hair.
Liquid only, Fruits only Diets Should Be Done For Short Intervals Only
“It’s best to avoid liquid-only and fruit-only diets entirely. If attempted, they should be limited to short cleanses, ideally no more than a day. Even that isn’t advisable for individuals with underlying health conditions like diabetes, or kidney and liver diseases.” – Raina Grover, Hair Expert & Co-founder of 1 Hair Stop
If done for tiny intervals, they can help cleanse toxins from the body.
If done for a long period, they won’t just ruin your hair health but also severely alter the function of vital organs and body functions.
The Vegan Diet Is a Hit or Miss in the Hair Growth Department
Over the past few years, the Vegan Die’s popularity has only soared. It was searched 27,100 times every month in the past year. Vitamin and mineral deficiency, as well as a protein shortage, are huge concerns for those who go vegan. A direct impact of that can be seen on your hair.
A Vegan diet can only work for hair growth and maintaining hair health if carefully planned and executed. You will have to be extra careful to consume the required amounts of protein and other food groups essential for hair.