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Fitify diet caps review: does it work for weight loss?

Robbie Puddick (RNutr)
Written by

Robbie Puddick (RNutr)

Content and SEO Lead

Medically reviewed by

Dr Rachel Hall (MBCHB)

Principal Doctor

11 min read
Last updated July 2025
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Jump to: What Fitify claims to do | Ingredient analysis | Scientific evidence assessment | Cost and value assessment | UK regulatory considerations | Evidence-based alternatives | Take home message

There’s no clinical evidence that Fitify diet caps support weight loss. The supplement contains several ingredients with modest research behind them, particularly caffeine and green tea extract, but the dosages are far below the levels shown to be effective in clinical studies.

While many hope for a simple solution to weight loss, the reality is that most supplements often fail to meet the expectations they set in their unregulated marketing claims.

At £25.80-£69.90 per month, Fitify diet caps represent a significant investment for effects that research suggests would be minimal at best.

The product essentially provides a low dose of caffeine (equivalent to one cup of coffee) combined with various vitamins and plant extracts at levels below what would be needed to have any meaningful effects on the body.

For those seeking sustainable weight loss, evidence-based approaches such as behaviour change programmes or medically-supervised treatments offer significantly better results.

The fundamental problem with most weight loss supplements is that they offer a quick-fix solution to a complex problem that requires a commitment to lifestyle and mindset changes, which can take years to overcome.

Keep reading if you’d like to learn more about Fitify, its marketing claims, and the lack of science behind its claimed benefits.

Key points:

  • No clinical evidence supports Fitify’s weight loss claims
  • Contains ingredients at doses far too low to be effective
  • Costs £25.80-£69.90 monthly with minimal expected benefits
  • Equivalent to paying for an expensive cup of coffee daily
  • Evidence-based approaches provide better value for weight management

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Understanding what Fitify claims to do

Fitify diet caps market themselves as a “revolutionary” weight management solution that supposedly delivers multiple benefits:

  • Boosting metabolism to increase fat burning
  • Suppressing appetite to reduce food intake
  • Enhancing energy levels for daily activities
  • Supporting healthy weight goals while improving confidence

The product is promoted as natural, GMO-free, and 100% vegan, with directions suggesting that one capsule be taken daily, 15-30 minutes before breakfast or with a meal.

The marketing emphasises that users should combine the supplement with a healthy diet and exercise for optimal results, with effects potentially taking 4-6 weeks to appear.

What’s notably missing from the marketing is any reference to clinical trials testing the complete Fitify formula.

Instead, claims rely on the theoretical benefits of individual ingredients, a common approach in the supplement industry that overlooks how these ingredients interact when combined.

Key points:

  • Fitify claims to boost metabolism, suppress appetite, and enhance energy
  • Marketed as natural, vegan, and GMO-free
  • Recommends one capsule daily, with results in 4-6 weeks
  • No clinical trials testing the complete formula
  • Marketing relies on the theoretical benefits of individual ingredients

Ingredient analysis: What’s actually in Fitify?

Fitify contains a blend of vitamins, minerals, and plant extracts. Each capsule provides:

Ingredient Amount per Capsule Effective Research Dose % of Effective Dose
Vitamin B6 2mg (142% NRV) No direct weight loss effect N/A
Vitamin B12 10µg (400% NRV) No direct weight loss effect N/A
Chromium 15µg (37% NRV) 200-1000µg 1.5-7.5%
Caffeine 100mg 200-400mg 25-50%
Green Tea Extract 50mg (7.5mg EGCG) 400-500mg EGCG ~1.5-1.9%
Guarana Extract 19mg Minimal human data Unknown

This analysis reveals a significant issue: while some ingredients have research behind them, the amounts in Fitify are considerably lower than the doses shown to be effective in clinical studies.

Let’s examine the evidence for each component:

Vitamin B6 (2mg): This vitamin supports energy metabolism but shows no direct weight loss benefits unless you’re deficient.

The dose in Fitify meets daily needs but won’t drive weight loss on its own.

Vitamin B12 (10µg): Low B12 can cause fatigue that might indirectly affect weight by reducing activity levels.

However, supplementation only helps if you’re deficient.

The dose in Fitify (400% of NRV) ensures adequate intake but offers no additional weight loss benefit.

Chromium (15µg): Often promoted for blood sugar regulation and craving reduction. Meta-analyses show modest weight reductions (about 0.75kg) in overweight individuals, but at doses of 200-1000µg daily.

Fitify contains just 15µg, far below the therapeutic range shown in research.

Caffeine (100mg): The most evidence-backed ingredient in Fitify. Research shows caffeine can increase energy expenditure and fat oxidation slightly.

However, the 100mg dose (equivalent to one cup of coffee) provides minimal effect, and regular coffee drinkers develop tolerance to these benefits quickly.

Green Tea Extract (50mg, with 7.5mg EGCG): Contains catechins, like EGCG, that may boost metabolism through enhanced fat oxidation.

EGCG (epigallocatechin gallate) is a specific type of catechin found in green tea that’s responsible for many of its potential health benefits.

Meta-analyses show small weight loss benefits (around 1.1kg over 12 weeks), but at much higher doses (400-500mg EGCG daily).

Fitify’s dose is approximately 1.5% of what research shows might be effective.

Guarana Extract (19mg): Contains additional caffeine (approximately 4mg) and has shown some promising results in animal studies.

However, human evidence is limited and inconclusive. The tiny dose in Fitify adds negligible benefit beyond its caffeine content.

Importantly, no studies have tested this specific combination of ingredients at these dosages.

The formula includes ingredients with some theoretical benefits, but at levels unlikely to produce meaningful effects.

Key points:

  • Vitamin B6 and B12: No direct weight loss benefits unless deficient
  • Chromium: Only 1.5-7.5% of the effective research dose (200-1000µg)
  • Caffeine: 100mg (one cup of coffee equivalent), below effective dose
  • Green tea extract: Contains only 1.5-1.9% of effective EGCG dose
  • Guarana: Negligible amount with limited human evidence
  • No studies testing this specific combination of ingredients

Scientific evidence assessment: Does it hold up?

When evaluating weight loss supplements, we must distinguish between theoretical mechanisms and actual clinical outcomes.

For Fitify, several key issues emerge:

  1. Sub-therapeutic dosing: Most ingredients are present at fractions of research-backed effective doses. Green tea extract, for example, contains only about 1.5% of the EGCG shown to have modest effects in studies.
  2. Lack of product-specific research: No clinical trials examine this specific formulation. Claims rely on individual ingredient studies at higher doses and often in different populations.
  3. Modest effects even at optimal doses: The most well-supported ingredient, caffeine, typically produces small effects (around 1-2kg over months) at doses higher than what Fitify provides.
  4. Temporary benefits: Research shows that any metabolic benefits from ingredients like caffeine diminish with regular use as the body develops tolerance.

The strongest potential benefit would come from the caffeine content, which might provide a small, temporary energy boost.

However, simply drinking a cup of coffee would deliver similar effects at a fraction of the cost.

Looking at the scientific literature objectively, we find that even at optimal doses (which Fitify doesn’t provide), the ingredients show modest effects at best:

  • Green tea extracts: Meta-analyses show approximately 1.1kg additional weight loss over 12 weeks at doses 65 times higher than in Fitify
  • Caffeine: Research indicates about 0.5-1kg extra weight loss over months at doses 2-4 times higher than in Fitify
  • Chromium: Studies suggest approximately 0.75kg additional weight loss at doses 13-67 times higher than in Fitify

The most realistic expectation based on this evidence would be minimal effects, well below what most consumers would consider meaningful for weight management.

Key points:

  • Four major issues: sub-therapeutic dosing, lack of product testing, modest effects even at optimal doses, and temporary benefits
  • Best ingredient (caffeine) equivalent to one coffee cup
  • Green tea extract research shows 1.1kg loss at 65× Fitify’s dose
  • Caffeine studies show 0.5-1kg loss at 2-4× Fitify’s dose
  • Chromium research shows 0.75kg loss at 13-67× Fitify’s dose
  • Realistic expectation: minimal effects (far below meaningful results)

Cost and value assessment

At £25.80-£69.90 per bottle (30 capsules), a month’s supply of Fitify costs between £26-70, depending on the package purchased. Let’s assess the value proposition:

  • Monthly cost: £25.80-£69.90
  • Recommended duration: At least 3-6 months (£77.40-£419.40 total)
  • Expected benefit based on evidence: Minimal (possibly 0-1kg beyond diet and exercise)
  • Cost per potential kilogram lost: Potentially hundreds of pounds per kilogram

For comparison:

Approach Monthly Cost Average Weight Loss Cost per kg Lost Long-term Support
Fitify £25.80-£69.90 Minimal (0-1kg beyond lifestyle) £100+ None
Cup of coffee daily £10-15 Similar to Fitify £10-15 None
NHS weight management Free 3-5% body weight £0 Yes
Second Nature non-medication programme £40-£55 6.4% body weight £20-25 Yes
GLP-1 medications £150-300 15-25% body weight £20-25 Varies

The value assessment is clear: Fitify represents a poor investment relative to both free NHS services and more comprehensive programmes like Second Nature that address the behavioural aspects of weight management.

The opportunity cost is also significant; money spent on unproven supplements could instead be used to fund evidence-based approaches or nutritious whole foods that naturally support metabolism and appetite regulation.

Key points:

  • Monthly cost: £25.80-£69.90 (£77.40-£419.40 for recommended 3-6 months)
  • Estimated benefit: Possibly 0-1kg beyond lifestyle changes
  • Cost per kg lost: Potentially hundreds of pounds
  • Better alternatives: Coffee (similar effect, lower cost), NHS programmes (free), Second Nature (better results), GLP-1 medications (significant results)
  • Opportunity cost: Money better spent on nutritious food or evidence-based programmes

UK regulatory considerations

In the UK, dietary supplements are subject to different regulatory standards from medicines.

The Medicines and Healthcare products Regulatory Agency (MHRA) doesn’t pre-approve supplements for efficacy before they reach the market.

Instead, supplements must:

  • Not be unsafe when used as directed
  • Not make medicinal claims (treating or preventing disease)
  • Follow labelling requirements for food products

This regulatory framework means that supplement manufacturers can make structure-function claims without providing substantial evidence, as long as they don’t claim to treat specific diseases.

The Advertising Standards Authority (ASA) has previously ruled against weight loss supplements making unsubstantiated claims.

Typical marketing phrases that may breach ASA guidelines include dramatic testimonials, before/after imagery without proper context, and claims about “revolutionary” or “breakthrough” formulations without appropriate evidence.

UK consumers should be aware that:

  • Supplements are not evaluated for effectiveness by regulatory bodies
  • Marketing claims may legally highlight theoretical benefits while downplaying limitations
  • The burden of researching evidence falls largely on the consumer

For safety, the ingredients in Fitify appear to be generally well-tolerated at the listed doses, although caffeine-sensitive individuals should exercise caution.

However, safety alone doesn’t justify the cost when effectiveness is questionable.

Key points:

  • MHRA doesn’t pre-approve supplements for effectiveness
  • Supplements only need to be safe and properly labelled
  • ASA has ruled against unsubstantiated weight loss claims
  • Companies can make structure-function claims without robust evidence
  • Consumers bear the burden of researching supplement effectiveness
  • Safety doesn’t justify cost when benefits are minimal

Evidence-based alternatives

If you’re seeking effective weight management support, several evidence-based alternatives offer better value:

For natural metabolism support:

  • Regular physical activity (150+ minutes weekly) increases metabolic rate more effectively than any supplement
  • Protein-rich meals (25-30g per meal) increase the thermic effect of food, burning more calories during digestion
  • Green tea consumption provides antioxidants and modest metabolism benefits at a fraction of supplement costs

For appetite management:

  • High-fibre foods naturally slow digestion and increase fullness hormones
  • Adequate protein reduces hunger hormones and increases satiety
  • Regular meal patterns help regulate hunger hormones naturally
  • Mindful eating practices reduce impulsive consumption

For significant weight management:

  • NHS weight management services provide free, evidence-based support
  • Structured behaviour change programmes like Second Nature combine psychological approaches with nutrition guidance
  • For those with obesity or weight-related health conditions, medical options like GLP-1 medications offer significant results with proper supervision

For sustainable results:

Instead of spending £25-70 monthly on supplements with questionable benefits, consider investing in:

  • Quality whole foods that naturally support metabolism and satiety
  • Kitchen equipment that makes healthy cooking easier
  • Evidence-based apps for meal planning and activity tracking
  • Professional guidance from registered dietitians or nutritionists

These approaches address the fundamental drivers of weight management, not just through temporary metabolic effects but by developing sustainable habits that support long-term health.

Key points:

  • Physical activity (150+ minutes weekly) boosts metabolism more than any supplement
  • High-protein meals (25-30g) naturally increase calorie burning during digestion
  • High-fibre foods and consistent meal patterns naturally regulate appetite
  • NHS weight management services provide free, evidence-based support
  • Second Nature offers structured behaviour change with clinical evidence
  • Invest in whole foods, cooking equipment, and professional guidance instead of supplements

Frequently asked questions

Does Fitify work for weight loss?
Based on available evidence, there’s no reason to believe Fitify would produce meaningful weight loss results.

The ingredients are present at doses far below what research suggests might be effective.

Are the ingredients in Fitify safe?
The ingredients appear generally safe at the listed doses for most healthy adults.

However, those sensitive to caffeine should be aware that each capsule contains approximately 100mg (similar to a cup of coffee).

How much weight could I lose with Fitify?
Research on the individual ingredients at much higher doses suggests minimal effects beyond diet and exercise, perhaps 0-1kg over several months, and even this estimate may be optimistic given the low dosages.

Is Fitify worth the money?
At £25.80-£69.90 monthly, Fitify represents poor value compared to both free NHS weight management services and more comprehensive programmes that address the behavioural aspects of weight control.

What’s a better alternative to Fitify?
For similar or better results without the cost, simply drinking green tea, maintaining adequate protein intake, and being more physically active would likely provide comparable metabolic benefits.

For more significant results, structured programmes like Second Nature or medical options for those who qualify offer better value.

How are weight loss supplements regulated in the UK?
In the UK, supplements aren’t pre-approved for effectiveness by the MHRA. They must be safe and correctly labelled, but don’t need to demonstrate efficacy before marketing.

Key points:

  • There’s no clinical evidence that Fitify produces meaningful weight loss results
  • Ingredients are generally safe, but it contains caffeine equivalent to one coffee
  • Realistic expectation: 0-1kg beyond diet and exercise (if any)
  • Poor value compared to NHS services or comprehensive programmes
  • Better alternatives: Simple lifestyle changes, structured programmes, or medical options for eligible individuals
  • UK supplements aren’t pre-approved for effectiveness, only safety

Take home message

Fitify diet caps contain ingredients with some theoretical weight management benefits, but at dosages far too low to produce meaningful effects based on available research.

At £25.80-£69.90 per month, the supplement essentially provides a cup of coffee’s worth of caffeine, combined with vitamins and plant extracts at sub-therapeutic levels, making it poor value compared to evidence-based alternatives.

The fundamental challenge with most weight loss supplements is that they promise shortcuts around the proven requirements for sustainable weight management: balanced nutrition, regular physical activity, and behavioural strategies that support healthy habits.

For anyone seeking meaningful weight management support, evidence-based approaches such as NHS services, structured behaviour change programmes, or medical options for those who qualify will provide significantly better results than unproven supplements with minimal research backing.

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.

Medication-assisted weight loss with a future focus

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

Mounjaro pen
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