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Evolution Slimming: SlimKick weight loss patch review

Robbie Puddick (RNutr)
Written by

Robbie Puddick (RNutr)

Content and SEO Lead

Medically reviewed by

Dr Rachel Hall (MBCHB)

Principal Doctor

9 min read
Last updated July 2025
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Jump to: Understanding SlimKick Patches | The science behind transdermal delivery | Ingredient analysis | Overall effectiveness | UK considerations | Better alternatives | Take home message

There is no evidence that SlimKick weight loss patches support weight loss. They contain some ingredients with modest research backing them, particularly seaweed extract; however, no studies have specifically tested the complete product in its patch form.

While research suggests that some ingredients, such as Fucus vesiculosus, may influence thyroid function, and Guarana contains caffeine that might slightly boost metabolism, there’s simply no evidence these ingredients can be delivered through the skin to support weight loss or have any meaningful effect on our body.

At nearly £30 a month, you’re paying a premium for ingredients that could be obtained more effectively and affordably through whole foods, despite claims about being the “best weight loss patch” on the market.

The supplement industry frequently promotes patches as convenient alternatives to making healthy lifestyle changes, appealing to those seeking an easier weight loss solution that doesn’t require changing their eating habits.

Many people attracted to SlimKick are seeking a discreet, effort-free approach to weight loss, but the reality is that sustainable weight loss requires addressing nutrition, physical activity, and our relationship with food rather than relying on unproven patches.

Understanding the difference between marketing claims and scientific evidence helps you make informed decisions about whether this expensive product offers genuine value or merely expensive hope.

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Understanding SlimKick Patches

SlimKick Weight Loss Patches are marketed as a “discreet and easy way of losing weight” through transdermal delivery (through the skin) of natural ingredients.

The product is designed to be applied to clean skin where it supposedly releases active ingredients throughout the day.

According to the manufacturer, Evolution Slimming, these patches work by suppressing appetite and boosting metabolism to support weight loss without requiring significant lifestyle changes.

They’re promoted as particularly helpful for people who struggle to remember to take diet pills or prefer not to swallow tablets.

The company claims these patches can help users lose “up to 12lbs a month” or “1-3lbs weekly” when combined with sensible diet and exercise. Marketing materials emphasise that the patches are “100% natural” and free from side effects.

SlimKick Patches are part of a broader range of weight loss products from Evolution Slimming, including day and night supplements that can be used together for “round-the-clock” weight management support.

The patches are applied once daily to clean, dry areas of the skin, such as the stomach, back, arms, or thighs, and are designed to be worn throughout the day.

Each package contains 30 patches, providing a one-month supply.

While the marketing suggests that the patches work through “innovative transdermal technology,” we should take a closer look at whether this approach actually works.

The science behind transdermal delivery

Transdermal delivery systems (patches) work by allowing active ingredients to pass through the skin and enter the bloodstream directly. This approach bypasses the digestive system and first-pass metabolism in the liver, which can be beneficial for certain medications.

For a transdermal system to be effective, the active compounds must have specific properties:

  • Be small enough to penetrate the skin barrier
  • Be able to dissolve in fat to pass through the skin
  • Work effectively in small amounts, since only a small portion gets through the skin

Successful transdermal medications include nicotine patches, hormone replacement therapy, and certain pain medications. These work because they meet all the above criteria and have been thoroughly tested in clinical trials to prove their efficacy.

Weight loss patches, however, have no evidence to support their effectiveness through transdermal delivery.

Many of the plant compounds in SlimKick Patches are large molecules that struggle to penetrate the skin barrier in meaningful amounts.

Additionally, even if small amounts were absorbed, the doses would likely be far below what research shows is effective when taken orally.

The skin is designed as a barrier to keep substances out of the body, and this protective function can’t be easily overcome.

While SlimKick claims to use “advanced transdermal technology,” no details are provided about what this technology entails or how it overcomes the skin barrier.

Without published research on the specific formulation and its ability to deliver active ingredients through the skin, claims about transdermal delivery of weight loss compounds remain scientifically questionable.

Ingredient analysis

SlimKick Patches contain several natural ingredients that the manufacturer claims to support weight loss. Here’s what the scientific evidence actually shows for each key component:

Ingredient SlimKick claims Evidence quality Reality
Fucus Vesiculosus (Bladderwrack) “Boosts metabolism by stimulating the thyroid gland” Weak (limited human studies) Contains iodine which can affect thyroid function, but no evidence it causes weight loss in humans
Guarana “Gently releases energy and prevents fatigue” Moderate (for caffeine content) Contains caffeine that may slightly increase metabolism, but transdermal delivery is questionable
Zinc Pyruvate “Burns fat, boosts endurance, increases lean muscle” Poor (minimal evidence) Some studies show modest effects when taken orally at high doses, but a systematic review found no convincing evidence for weight loss; no evidence for patches
5-HTP (Griffonia Seed Extract) “Supports mood balance and satiety” Mixed (inconsistent results) A randomized controlled trial showed some appetite suppression effects when taken orally, but unlikely to penetrate the skin
Hoodia Gordonii “Suppresses appetite” Very Poor (lacks clinical support) No evidence to support claims
Peppermint Oil Not specifically claimed Minimal (for weight loss) May help with digestion when ingested, no evidence for transdermal weight loss effects

The fundamental issue is transparency regarding dosages. SlimKick Patches don’t disclose the exact amounts of each ingredient, making it impossible to determine whether they contain effective doses.

Even the best-supported ingredient, Guarana, would need to deliver sufficient caffeine through the skin to have any metabolic effect.

Given the limitations of the skin barrier, this is highly unlikely without specialised delivery technology that has been clinically validated.

Overall effectiveness assessment

Based on available evidence, the effectiveness of SlimKick Weight Loss Patches for meaningful weight loss appears highly questionable for several key reasons:

Transdermal absorption limitations: The main active ingredients in SlimKick Patches are unlikely to penetrate the skin in therapeutically meaningful amounts.

Without specialised delivery technology that has been independently verified, these compounds would largely remain on the skin surface.

Lack of product-specific research: No clinical trials or peer-reviewed studies have tested SlimKick Patches specifically. Without such testing, claims about effectiveness are based on theoretical mechanisms rather than proven results.

Ingredient effectiveness concerns: Even when taken orally at higher doses than could realistically be delivered through a patch, many of the ingredients show limited or inconsistent weight loss benefits in research.

Absence of independent verification: The product primarily relies on testimonials and company claims, rather than independent laboratory testing or clinical validation of its effectiveness.

Realistic expectations: If any weight loss occurs while using these patches, it is likely to be attributable to the placebo effect or concurrent dietary and lifestyle changes, rather than the patch itself.

Transdermal vs. oral delivery: The theoretical benefits of many ingredients are based on oral consumption studies, which cannot be directly applied to transdermal delivery due to fundamental differences in absorption and bioavailability.

Bottom line: there’s no solid research showing these patches actually work for weight loss, despite what the marketing claims.

UK regulatory and cost considerations

MHRA oversight

In the UK, the Medicines and Healthcare Products Regulatory Agency (MHRA) regulates medicines and medical devices; however, weight loss patches like SlimKick typically fall under food supplement regulations, as they don’t make specific medical claims.

The product is marketed as a food supplement, which means it doesn’t require pre-market approval or the rigorous clinical testing that medicines undergo.

This regulatory classification allows for more flexibility in marketing but provides less consumer protection regarding efficacy claims.

While the MHRA can take action against products making unauthorised medicinal claims, the structure-function claims often used for weight loss patches (“supports metabolism” rather than “treats obesity”) generally fall outside their strict enforcement priorities.

Cost analysis

At approximately £29.95 for a 30-day supply (single patch), SlimKick represents a significant financial investment:

  • Monthly cost: £29.95 (or less with bulk purchases)
  • Annual cost: Approximately £360 if used continuously
  • Cost comparison: More expensive than many basic supplements but cheaper than prescription weight loss treatments

For perspective, here’s how this compares to other weight management approaches:

  • NHS-prescribed orlistat: £0-40 monthly (depending on prescription status)
  • Private GLP-1 medications: £150-300 monthly (with significantly better evidence)
  • Second Nature’s non-medication programme: £39 a month (2-week trial)
  • Gym membership: £20-50 monthly (variable)

The value proposition of SlimKick depends entirely on effectiveness. Given the limited scientific support for transdermal weight loss delivery, the cost-benefit ratio appears poor compared to other alternatives that have been proven to work in the long term.

Availability and purchasing

SlimKick Patches are primarily available through:

  • The official Evolution Slimming website
  • Some third-party online retailers
  • Not typically found in major high street pharmacies or retailers

The company offers bulk purchase discounts and money-back guarantees; however, the specific terms and conditions of these guarantees should be carefully reviewed before making a purchase.

Better alternatives backed by stronger evidence

For those seeking effective weight management approaches, several evidence-based alternatives offer better value and more reliable results:

For appetite control:

  • High-protein breakfast: Eggs, Greek yoghurt, or protein-rich smoothies provide stable energy and lower hunger levels
  • Fibre-rich vegetables: Beans, lentils, broccoli, and leafy greens offer superior appetite control and gut health benefits
  • Green tea: Contains catechins and caffeine that may modestly support metabolism when consumed regularly

For significant weight loss:

  • NHS weight management programmes: Free, evidence-based support focusing on sustainable habit change (speak to your GP)
  • GLP-1 medications: For those meeting clinical criteria, these show 15-25% weight loss in trials, with proper medical supervision
  • Behaviour change programmes like Second Nature: Address the root causes of weight gain through sustainable habit formation

The whole foods approach:

Instead of spending £30 monthly on patches, invest in:

  • Quality protein sources (lean meats, fish, legumes)
  • A variety of vegetables and fruits
  • Whole grains and healthy fats

Result: Better nutrition, improved satiety, sustainable weight management, and long-term health benefits beyond just weight loss.

Red flags in SlimKick marketing

Several concerning patterns appear in SlimKick’s marketing that are common in the supplement industry:

Unrealistic weight loss claims: Suggestions of losing “up to 12lbs a month” exceed what’s typically considered safe and sustainable (1-2lbs weekly).

Mechanism oversimplification: Complex processes, such as metabolism and appetite regulation, are presented as simple problems with easy, patch-based solutions.

Vague technology claims: References to “advanced transdermal technology” without specific details about how it overcomes known skin barrier limitations.

Emphasis on convenience over evidence: Marketing focuses heavily on ease of use rather than providing robust scientific support for effectiveness.

No published clinical trials: Despite claims about effectiveness, no peer-reviewed studies specifically testing SlimKick Patches appear to be available.

Limited dosage transparency: The exact amounts of active ingredients aren’t clearly disclosed, making it impossible to assess potential efficacy.

These patterns suggest that marketing appeal rather than scientific validation may be the primary driver behind the product’s development and promotion.

Take home message

SlimKick Weight Loss Patches contain some ingredients with modest research behind them when taken orally, but no studies have specifically tested their effectiveness when delivered through a skin patch.

The fundamental challenge is biological: the skin serves as a protective barrier, and without specialised delivery technology that has been clinically validated, it’s unlikely that meaningful amounts of active compounds can be absorbed to produce weight loss effects.

At nearly £30 a month, this represents questionable value compared to evidence-based approaches such as NHS weight management programmes, nutrition-focused behaviour change support, or medical interventions for those who meet clinical criteria.

The most concerning aspect is not that the product exists, but that it might delay people from seeking approaches with stronger scientific backing that could provide genuine, sustainable results.

For individuals serious about weight management, the money would be better invested in quality nutrition, physical activity, and developing sustainable healthy habits rather than relying on patches with limited scientific support.

Second Nature's Mounjaro programme

Second Nature provides Mounjaro as part of our Mounjaro weight-loss programme

Why choose Second Nature over other medication providers, assuming you’re eligible?

Because peace of mind matters.

We’ve had the privilege of working with the NHS for over eight years, helping people across the UK take meaningful steps toward a healthier, happier life.

Our programmes are designed to meet people where they are, whether that means support with weight loss through compassionate one-to-one health coaching, or access to the latest weight-loss medications (like Mounjaro) delivered alongside expert care from a multidisciplinary team of doctors, psychologists, dietitians, and personal trainers.

At the heart of everything we do is a simple belief: real, lasting change comes from building better habits, not relying on quick fixes. We’re here to support that change every step of the way.

With over a decade of experience, thousands of lives changed, and a long-standing record of delivering programmes used by the NHS, we believe we're the UK’s most trusted weight-loss programme.

We hope to offer you something invaluable: peace of mind, and the support you need to take that first step.

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Start with Mounjaro, transition to habit-based health with our support

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