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Forza Raspberry K2

Produced by Forza, Raspberry K2 is claimed to be an effective formula consisting of just 4 ingredients. However, the weight loss claims are not backed up by strong scientific evidence.

Below we have reviewed Forza Raspberry K2 against our review criteria to help consumers make an informed decision.

Forza Raspberry K2

Forza Raspberry K2 Pros
  • Information on ingredient quantities and usage instructions available
  • No known serious side effects
  • Available to buy in high street stores
Forza Raspberry K2 Cons
  • Limited clinical evidence to support weight loss effects of ingredients
  • Safety of some ingredients has not been well-studied
  • No money-back guarantee

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Forza Raspberry Ketones Review

Forza claim that their latest product contains all natural ingredients including the ‘most interesting vitamin of the decade’, providing the body with vital nutrition whilst helping to boost metabolism and burn excess fat.

Claimed weight loss benefits

Forza Industries, the company behind Raspberry K2, claim that their weight loss supplement is a fat burner. Some of the ingredients in the product are also touted for having metabolism boosting and appetite suppressing qualities.

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How Forza Raspberry K2 Works

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The manufacturers of Forza Raspberry K2 describe their product as a premium diet formula that is made up of just 4 simple ingredients. Through the abilities of its key ingredients, Forza Raspberry K2 is thought to be able to aid weight loss by controlling adiponectin levels and boosting metabolism while working to suppress appetite and banishing hunger pangs, as well as improving insulin sensitivity.


Caffeine is often used as a staple ingredient in popular diet pills; it is believed that caffeine is able to increase the process of lipolysis. Lipolysis occurs when the body releases fatty acids into the blood stream where they can be used for energy – essentially the body breaks down fat stores to use as fuel. Caffeine is a stimulant, which means that it is able to increase alertness and keeps drowsiness at bay temporarily which may also mean that you could exercise for longer.


Resveratrol is a natural extract that is derived from red wine that is found in the skin of grapes. The substance is thought to carry many positive health effects including the ability to reduce the risk of breast and prostate cancer as well as boosting immunity. Resveratrol is also thought to help the body to improve its handling of fat and determine whether fat should be stored or burned for fuel.

Red Raspberry

Red raspberry contains antioxidants, which may be beneficial for the body – they are claimed to boost the immune system and promote a sense of general wellbeing. However they are not the only substance that is beneficial within the fruit. Recently the aromatic compound known as raspberry ketone has come into the spotlight for its claimed ability to aid weight loss. It is thought that raspberry ketone is able to increase the body’s production of adiponectin, which modulates a number of metabolic processes inside of the body. Raspberry ketone is also believed to enhance your muscle’s ability to use carbohydrates as energy while suppressing appetite, leaving you less likely to overeat.

Vitamin K2

Vitamin K2 is a fat-soluble vitamin that is believed to help blood clot properly and promote healthy bones. However, the substance is often found in foods that are part of healthy weight loss diets. It is thought to offer a high level of bone support. It is also believed to protect the body from heart disease, ensure healthy skin, promote brain function and help to deposit calcium to the areas that need it.

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Key Forza Raspberry K2 Ingredients

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Caffeine is thought to have appetite suppressant and stimulant qualities. It is often found in weight loss supplements as it may be able to give the body an added boost in energy so that you can exercise for longer and potentially burn a larger amount of fat. It is also thought that caffeine is able to encourage lipolysis meaning that fatty acids are released into the blood stream and burned for energy, boosting your metabolism.


Resveratrol is a natural extract that is found in the skin of grapes. It is thought to be able to prevent certain types of cancer while boosting immunity and helping the body to burn fat. It may also be able to improve insulin sensitivity – this could be beneficial for those suffering with diabetes, and is also thought to help with appetite control.

Red Raspberry

Red raspberry contains lots of antioxidants which have a range of health benefits such as boosting the immune system, but raspberries also contain a molecule known as raspberry ketone which is believed to aid weight loss by increasing the body’s production of adiponectin which modulates a number of metabolic processes in the body. It is also believed that raspberry ketone can enhance the ability of muscles to process carbohydrates as energy.

Vitamin K2

Vitamin K2 is believed to help blood clot properly and promote healthy bones, offering bone support. It is also thought to help the body to protect itself against heart disease, keep skin healthy, aid calcium depository, and promote good brain function.

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Clinical Studies

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Clinical studies are carried out on supplements in order to establish how safe they are to use, how well they work and to determine whether they live up to their claims. However, the health supplement market is unregulated meaning that many supplements that are available to the public have not been tested at all.

There is no information on the Forza Raspberry K2 webpage to suggest that there has been any clinical testing on the product. However, there has been some testing on some of its ingredients.


A study was conducted in order to assess the long term effects of caffeine intake on weight during a 12 year period. Around 18,000 men and 40,000 women with no chronic disease at baseline were followed and their caffeine intake assessed every 2 to 4 years. Weight was calculated as the difference between the reported weight at baseline and the final weight recorded in 1998. The study concluded that those who had a larger amount of caffeine in their diet appeared to lose a larger amount of weight on average suggesting that increases in caffeine intake may lead to a small reduction in long term weight gain.


In 2011, a 30 day randomised, double blind, crossover study used 11 healthy, obese men and gave them either a placebo or 150mg of resveratrol each day. The study found that resveratrol was able to induce metabolic changes in obese humans, mimicking the effects of calorie restriction. More studies are however required in order to back up these results.

Red Raspberries

There has not been much clinical testing on how well red raspberries or raspberry ketone work to aid weight loss in humans, however there have been some studies conducted on mice that give some insight into their potential weight loss properties. One study took place using mice who were given a diet high including 1.5, 1 or 2% raspberry ketone for 10 weeks. Another group of mice were then given a diet high in fat for 6 weeks and were fed the same high fat diet containing 1% raspberry ketone. The study concluded that raspberry ketone was able to prevent the mice from gaining as much weight as they should have.

Although there have been clinical studies carried out on some of Forza Raspberry K2’s key ingredients which show that the product may have a slight potential to aid weight loss, these studies are not definitive; not enough studies have been performed on each ingredient using reliable methods and human subjects. There are no studies to prove that the supplement as a whole is safe and effective. Without testing on the product it is impossible to know for certain how well the ingredients work together, if they produce any unwanted side effects or how much is the optimum amount to take.

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Forza Raspberry K2 Side Effects

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The Forza website states that it is very rare to experience side effects from its Raspberry K2 supplement, however there are some known side effects to its key ingredients. Caffeine is able to cause insomnia, restlessness, stomach irritation, nausea, increased heart rate and headaches and can potentially worsen some medical conditions – as can resveratrol.

There have been claims made by customers that Forza Raspberry K2 left them feeling sick with an unpleasant taste in their mouth that made it difficult to swallow. One user complained of suffering from heart palpitations, with others have said that the supplement left them unable to concentrate and feeling shaky. However, there are reviews that do not mention any side effects and the Forza website clearly states that everyone may react differently to the supplement and those who experience unwanted side effects should stop taking the product immediately.


Caffeine is found in many weight loss supplements, and there are known to be some potential side effects from the substance. These side effects include insomnia, nervousness, restlessness, stomach irritation, nausea and vomiting as well as increased heart rate and respiration, many of which can prove to be uncomfortable to live with. Larger doses might cause headache, anxiety, agitation, chest pain and ringing in the ears and extremely large doses are able to cause irregular heartbeat and even death.

It is not advised that pregnant and breast feeding women take caffeine as it can cause complications and put babies at risk. The substance is also known to worsen some medical disorders such as anxiety, bipolar, bleeding disorders, heart conditions, diabetes, irritable bowel syndrome, high blood pressure, glaucoma and osteoporosis and so anyone suffering from any of these conditions should speak with their doctor before trying the supplement.


While it is considered to be safe for adults to take resveratrol in the small amounts found in food, there is not enough clinical information to determine whether the substance is safe to use in larger amounts. Resveratrol is thought to be safe to use by pregnant and nursing women, however the source of the substance is important as while the substance is found in the skin of grapes and red wine, these women should not use wine as a source of resveratrol as it is able to harm infants. In hormone-sensitive conditions such as breast cancer, uterine cancer, ovarian cancer or endometriosis, resveratrol may act like oestrogen which may worsen these conditions and the substance may also increase the risk of bleeding during surgery so you should stop taking the substance 2 weeks before a surgery.

Red Raspberry

It is unknown whether red raspberry (raspberry ketone) is safe to use by children and adults; the ingredient has not been the subject of enough clinical testing to determine its safety for certain. There is some concern that it may cause side effects such as increased heart rate and blood pressure because raspberry ketones are similar in form to synephrine – a compound that is found in bitter orange and has been associated with dangerous side effects.

In some hormone-sensitive conditions like breast, uterine or ovarian cancer, endometriosis or uterine fibroids, red raspberry might act like oestrogen and so if you have any condition that might be made worse by exposure to oestrogen you should avoid using red raspberry.

To conclude, although most of the ingredients in Forza Raspberry K2 are not likely to cause severe side effects, others have not been the subject of enough study to state their safety with any certainty. The product contains caffeine, which is known to have some uncomfortable side effects, and the amount in each capsule is 200mg the amount that is found in 1-2 cups of coffee. As users are asked to take up to four capsules a day they may find that they experience some caffeine side effects similar to those described in the customer reviews. If you experience any severe or long-lasting side effects then it is recommended that you stop taking the product and consult a doctor.

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How to Use

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The Forza website recommends that users begin taking one capsule in the morning and one in the afternoon to assess their individual tolerance to the supplement, and then increase their intake to two capsules in the morning and one in the afternoon. It is advised that each serving should be taken with a full glass of water to speed up the action of the capsules as well as ensuring that you are well hydrated.

Users should not take any more than two capsules at a time, and should never exceed 4 capsules in a single day, making sure that they take their final serving before 3pm so that the caffeine in the supplement does not interrupt their sleep. The product should be stored in a cool dry place, away from children and should be used within 6 months of opening.

The instructions also point out some excluded groups of people who should avoid taking the supplement in case their health is jeopardised. These groups include pregnant or nursing women, those who are under the age of 18, those who are sensitive to caffeine, anyone taking prescription drugs including anti-depressants and those who have any pre existing medical conditions.

Users are also warned that individual results may vary and Forza Raspberry K2 is not a substitute for a varied and balance diet and lifestyle. Finally it is recommended that any potential users should speak with their doctor before trying the supplement, and if any unwanted side effects occur they should stop taking the product immediately and seek medical attention if necessary.

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Who Makes It?

Forza Raspberry K2 is distributed by Forza Supplements, the retail division of Forza Industries. The Forza brand was first established in 2007 and supposedly went on to become one of the UK’s most popular slimming solutions. Forza state on their website that they will continue to provide fat-burning products in a revolution that will continue until the world’s weight loss demands have been met.

The company are able to provide a registered company number, customer service telephone number, email address and physical address on their contact page. They use several celebrities to promote their products.

The company ensures its users that there are no hidden charges when it comes to purchasing a product from them and that their personal details will be kept safe and private. They do not use monthly automatic billing and do not keep payment details on file, meaning that unless you order again, you will only ever be charged once.

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Where to Buy Forza Raspberry K2


Forza Raspberry K2 can be purchased directly from the Forza website at £23 for a 1 month supply, meaning that the supplement averages to around 77p per day. Forza offer full refunds and exchanges on any faulty products or if you order the wrong product, as long as you return it in a good condition and its original packaging within 7 days. Forza also offer next day delivery and ship internationally, delivering to ‘virtually any address’.

Forza Raspberry K2 can also be bought through online retailers such as Amazon for around £17.80 with free delivery also available on some products. Finally it is possible to purchase Forza Raspberry K2 from the UK high street as shops such as Superdrug and Costco stock one bottle of the supplement for £19.99, or £28 for two bottles.

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Does Forza Raspberry K2 Meet our Approved Criteria

Money-back-guarantee: There is no mention of a money-back guarantee.

One-off payment: Yes, there do not appear to be any repeat payments.

Manufacturing Standard: Certified ISO 22000, ISO 9001 and ISO 14001.

Accompanying Diet Plan: No diet plan, but there is dieting and fitness advice available.

Ingredients and quantities disclosed: Yes – both are disclosed.

Company contact details readily available: Yes, these are easy to find on the Forza website.

Forza Raspberry K2 does not meet our ‘Approved’ criteria as there is no diet plan or money-back guarantee.

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Overall Verdict

Forza Raspberry K2 appears to be sold by an established company and plenty of information is available regarding the product and ingredients. Although there is no evidence available to suggest that there has been clinical testing on the product itself, studies on its key ingredients suggest that there should be no serious effects to the product. None of the key ingredients in the product have been proven to boost weight loss, but some have indicated a slight potential in clinical studies.

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