'Jersey Shore' star Vinny Guadagnino showed off a dramatic body transformation in a post about his lifelong struggle with weight loss

• Vinny Guadagnino showed off a dramatic body transformation on Instagram, which he credited to following the keto diet.
• "A lot of people didn't know that I struggled with my weight my whole life," Guadagnino wrote on his "Keto Guido" account, which he uses to promote his diet and cookbook.
• "Everything just seems to regulate itself out when I cut processed sugars and grains and eat quality meats, fats, and greens for the most part," he wrote.
• Guadagnino claims to have lost 50 pounds since starting the keto diet.
• However, the keto diet is not for everyone and can come with some pretty nasty side effects.
• Visit Insider's homepage for more stories.

"Jersey Shore" star Vinny Guadagnino spoke candidly about his struggle with weight loss in an Instagram post that showed off how his body has changed since switching to the keto diet.

"A lot of people didn't know that I struggled with my weight my whole life," Guadagnino wrote on his "Keto Guido" account, which he uses to promote his diet and cookbook.

"I was the king of yo-yo dieting. I was my biggest during the years I was off TV so a lot of people didn't realize," he continued.

"My genetics make me gain weight easily especially to high sugar/carb food."

Guadagnino went on to explain that he now sticks to a "low carb/ moderate protein/ high fat" diet, otherwise known as the keto or ketogenic diet, which cuts carbohydrates and promotes fat and protein.

"Everything just seems to regulate itself out when I cut processed sugars and grains and eat quality meats, fats, and greens for the most part," he wrote.

A lot of people didn’t know that I struggled with my weight my whole life. I was the king of yo-yo dieting.I was my biggest during the years I was off TV so a lot of people didn’t realize.My genetics make me gain weight easily especially to high sugar/carb food.That being said I believe calories also matter.If you eat a surplus of calories a week you will gain weight and if you eat less calories than you burn you will usually lose weight (unless you’re in too much of a deficit and your body goes into starvation).So if you figure out how many calories you need to eat a day and be in a deficit,you will lose weight.The question is,what types of foods are those calories made up of? Are you high carb/low fat ? High protein / low fat ? I prefer low carb/ moderate protein/ high fat with #cleanketo... _ I do this for a few reasons :1) i don’t react well to sugar. It bloats me,makes me feel groggy and lethargic, and i feel that it makes me fat easily.2)I’m an Italian foodie so I LOVE the taste of food.So I need fat in my diet to create delicious meals while still eating clean(ie. a ribeye steak and creamed spinach over grilled chicken and quinoa)3.)I have more sustainable energy over long periods of time.I don’t feel groggy and I have more mental clarity.I don’t walk around starving because the food is sustainable.I enjoy fasting so i need food that will fill me up during my fasts. I find that higher carb diets make me feel hungry during my fasting hours.4)I believe that #cleanketo (meats and greens)emulate how our hunter and gather ancestors ate,therefore how our bodies were evolved to eat . Hunting meat and gathering leaves ,seeds, etc while moving around all day on empty stomachs (exercise and fasting) 5) my bloodwork indicates my body has been healthier than ever. Everything just seems to regulate itself out when i cut processed sugars and grains and eat quality meats, fats, and greens for the most part ( with treat meals in between of course) this isn’t easy to do in the modern sugar world but possible. So u can eat twinkies and be in a deficit and probably lose weight but is that healthy and sustainable? Chose what calories are best for you #ketoguido

A post shared by Vinny (@ketoguido) on Apr 21, 2020 at 12:11pm PDTApr 21, 2020 at 12:11pm PDT

Guadagnino claims to have lost 50 pounds since starting the keto diet, but it might not be healthy for everyone.

Nutritionists recently told Insider that putting children or teens on the keto diet — or any restrictive diet — can lead to nutritional deficiencies and eating disorders.

Even if you're healthy, long-term keto could lead to vitamin B and C deficiencies, since many foods rich in these vitamins — like beans, legumes, and fruit — are also high in carbs, Madeline Kennedy previously reported for Insider.

People considering trying the keto diet are advised to speak with a certified nutritionist beforehand, especially if you have a medical condition that the diet may affect.

Read more:

I lost more than 120 pounds on the keto diet. Here's why I'm quitting it.

What a day of healthy eating looks like on the keto diet, according to nutritionists

10 of the biggest downsides of the keto diet

Read the original article on Insider