(LAST FACT CHECKED on October 2 , 2022)

Rating. 5/5



  • Promotes Fat Loss
  • Controls Appetite and Curbs Cravings
  • Incredible All-Day Focused Energy
  • Prevents Stress-Induced Fat Storage


  • The product has been discontinued.
  • Royal 21 King may cause jitters & anxiety.

Royal 21 King System Review: Fat Loss Fit For a King?

When it comes to burning fat, men face unique challenges that women do not. Royal 21 King System is a fat burner designed specifically for men and claims to help overcome these challenges. In this post, we’ll take a closer look at Royal 21 King and determine whether or not it works as advertised.

What is Royal 21 King?

The Royal 21 King System consists of 3 supplements: 2 are shared with the Royal 21 Queen System, while the third is not.

With a synergic effect, they all work for one goal: helping men with their weight loss goals.

Royal 21 King System by 1st Phorm claims to help you with that by optimizing your chances of success.


What’s in it?

1. T-21

The T in this supplement stands for Thyroid. That’s because it feeds your body all the essential materials for thyroid hormone production. T-21 speeds up your metabolic rate and core body temperature by doing so. As you probably know, this results in increased caloric expenditure.

Some ingredients in the T-21 supplement by 1st Phorm include caffeine, green tea extract, and bitter orange extract. These ingredients are known to help boost metabolism and promote weight loss.

Let’s take a look at each:

Caffeine: According to a study published in the “Journal of American College of Nutrition,” caffeine can help boost weight loss and promote fat burning. The study found that consuming caffeine before exercise can help increase the amount of fat burned during exercise.

Green tea extract: Some people think green tea extract can help burn fat in the body. People believe this because green tea has been shown to raise metabolism and help the body use more energy, according to a study published in the “International Journal of Obesity and Related Metabolic Disorders.”

Bitter orange extract: Bitter orange extract has been shown to induce weight loss in several studies. In a study published in the “Journal of Medicinal Food” in 2006, researchers found that bitter orange extract could increase weight loss in overweight participants when combined with caffeine. Another study, published in “Metabolism” in 2009, showed that bitter orange extract improved body composition and reduced waist circumference in obese women.

Raspberry Ketones: Raspberry Ketones are chemicals gained from red raspberries, grapes, apples, and various other types of berries. They affect a hormone called adiponectin which promotes fat shredding and reduces food cravings. Additionally, raspberry ketones are known for speeding up metabolic rate, resulting in weight loss.

Directions: Take two (2) capsules twice daily, 4-6 hours apart. Do not take it after 5 P.M. It May cause sleeplessness. Do not exceed four (4) capsules in 24 hours. Cycle use of Thyro-21 in a 5-day on, 2-day off pattern. For maximum fat loss results, take the Thyro-21 as a part of the Royal XXI King or Royal XXI Queen Weight Loss Results Systems

2. C-21

The C in this supplement stands for Cortisol. Often referred to as stress hormone, high levels of Cortisol promote weight gain. As such, they need to be reduced to lose weight effectively, and that’s just what C-21 does best. In addition, this supplement will also provide you with restful sleep, allowing you to work at your peak at the gym.

Ingredients include:

Rhodiola Rosea Extract: Rhodiola is a plant whose root is commonly used for medicinal purposes. It is known to treat health issues such as irregular heartbeat, tuberculosis, diabetes, and regular cold. Rhodiola Rosea extract is used in many supplements to increase athletic performance, energy, strength, stamina, and mental capacity.

Directions: Take three (3) capsules with 16-20oz. Of water, about 45-60 minutes before you want to fall asleep. Cycle use of Core-21 in a 5-day on, 2-day off pattern.

3. Royal 21 King

Royal King is the wonder supplement for men. Not only does it eliminate cravings, but it also provides its users with clean energy and exceptional focus throughout the usage period. These effects will allow you to concentrate on your workout routine even more and enable you to do more reps with its energy-boosting formula.

Two of the star ingredients include:

Theacrine: Theacrine, a chemical compound similar to caffeine, is commonly found in tea and coffee. It treats conditions such as the common cold and chronic fatigue. Moreover, people also use it as an anti-aging agent. Theacrine is most frequently used in bodybuilding supplements to decrease fatigue and improve athletic performance.

Dimethylethanolamine: Dimethylethanolamine, or DIM, is a phytochemical found in cruciferous vegetables such as broccoli and kale. It benefits overall health but is also sometimes used as a weight loss supplement. One study showed that DIM could help reduce body fat in rats.

As with any dietary supplement, test your tolerance by taking one capsule in the morning with 16 ounces of water on an empty stomach 30-45 minutes before your first meal or shake. Wait five (5) hours, and if suitable, you may take a second capsule with 16 ounces of water on an empty stomach 30-45 minutes before a meal or shake to assess tolerance further.


Even though 1st Phorm did its best to eradicate all side effects that might occur with these three products, a few still tend to appear in sporadic cases: rapid heartbeat and increased blood pressure. Neither of these is dangerous since they will go away relatively quickly, meaning you don’t need to panic.


Aside from the fat loss results, the most important benefits of this stack are the fact that this product is specifically designed for men.

Men confront several difficulties that women do not, and this combination is designed to help overcome them. It’s made up of three different products, each focusing on addressing a distinct area of the weight loss process.

Not only will you increase your metabolism, but you will boost your focus and energy in the gym, which will build muscle mass and increases your resting metabolic rate as a result.


Let’s take a closer look at 2 reviews on this stack that we managed to find online:

Other Reviews of Royal 21 King:

“I managed to lose 5% body fat in just 3 weeks with this stack. For all of you looking to do the exact same thing, I warmly recommend these 3 supplements since they are pretty much everything you need to make your goals come true! Kudos to 1st Phorm, another monstrosity of a stack!”

– Miguel A

“1st Phorm is my favorite brand. Whenever I am preparing for an upcoming bodybuilding competition (read – whenever I need to take off a couple of extra pounds) I turn to their weight loss stacks. 2 weeks ago I was doing just that and I noticed they’ve just released a new one… and my oh my, am I amazed or what… It’s everything I wanted it to be.. and a bit more! 10/10”

If you keep up with your workout routine and use this stack while doing so, the results are guaranteed…”

– Harold P

“Don’t give up on your exercises if you don’t see any results after a week. Losing weight takes time, especially if your body fat index is over 40%…”

Also, from the Cardio and Weights blog, we found this before and after of a man who claimed to achieve incredible fat loss from taking the Royal 21 King stack:


Judging by the fact that it’s pretty hard to find a decent weight loss stack nowadays, it is safe to say that 1st Phorm did a great job with this one.

The carefully chosen supplements in the Royal 21 King System include all the powerful weight loss-promoting tools (when combined when an exercise regime) that are bound to get the job done.

Again, please remember that this product is specifically designed for men, so if you are a woman and you’re also looking to lose some weight, then take a look at the Royal 21 Queen System.

We believe there’s nothing more to be added regarding this excellent fat-burning stack.


Unfortunately, as of 2020, the Royal 21 King System is no longer available as a stack on the 1st Phorm website.

However, if you’re persistent, you can try your luck at any Supplement Superstore that probably has the Royal 21 King available. There are also a few listings on eBay as of July 2022. But there’s no saying when they might be sold out and unavailable for good.

The good news is that there are even better options since 1st Phorm discontinued the stack. You can check out their official website to learn more about 1 DB Overdrive Prime & Thyrodrive fat burners, which outdoes even the stack we’ve looked at in this review.

By clicking on this link, you can get free shipping on any 1st Phorm product at their site.

If you’ve taken Royal 21 King in the past, don’t forget to share your experience with this product by leaving a comment below.