Second Nature offers a comprehensive weight-loss programme with habit-change support alongside medication, while MedExpress provides medication-only access at a lower price point.
The primary difference lies in approach and the level of support. Second Nature combines weight-loss medication with daily access to registered dietitians, psychology-based habit formation, and peer support groups.
MedExpress functions primarily as a medication delivery service with a basic prescription offering.
Research shows that medication-only approaches typically lead to weight regain after treatment is stopped, while comprehensive programmes addressing underlying habits show better long-term results.
For those wondering about cost versus value, MedExpress appears cheaper initially (£99-£200 a month for medication only), but Second Nature’s higher price point (£149-249 a month for Wegovy) includes the complete programme, daily support from registered dietitians or nutritionists, and evidence-based tools for maintaining results.
Lose weight your way and keep it off
GLP-1 medication, expert support, and a programme that fits your life
At-a-glance comparison
Feature
Second Nature
MedExpress
Core approach
Medication + habit formation programme with psychology-based support
Medication delivery with basic prescription oversight
Monthly cost
£149-249 and £50 off the first month for our Wegovy programme (all-inclusive)
£99-£200 (medication only)
Professional support
Daily access to registered dietitians/nutritionists
Basic prescriber check-ins only
NHS partnership
NHS-commissioned since 2017, supports 250,000+ patients
No NHS partnerships
Peer support
Group-based programme with others on similar journeys
None
Customer satisfaction
4.6/5 on Trustpilot (7,700+ reviews)
4.4/5 on Trustpilot (34,000+ reviews, recent decline)
MedExpress positions itself as a medication provider with a straightforward approach: complete an online consultation, receive medication via delivery, and manage your weight loss journey independently.
The process focuses on providing access to weight-loss medications, such as Wegovy and Mounjaro, at competitive prices, with minimal ongoing support or guidance beyond basic prescriber check-ins.
In contrast, Second Nature operates as a complete behaviour change programme that includes medication.
The approach is built on psychological principles that address the underlying habits and behaviours driving weight gain.
While MedExpress leaves you largely on your own to figure out how to navigate life on weight-loss medications, Second Nature’s programme includes daily access to UK-registered dietitians and nutritionists who specialise in supporting members on weight-loss injections.
This difference becomes particularly important when managing side effects, navigating social situations, or preparing for life after medication; all critical factors in long-term success.
Support and professional guidance
When taking medications like Mounjaro or Wegovy, having proper support can significantly impact your experience and results.
MedExpress support limitations
MedExpress provides basic medical support through:
Initial eligibility assessment by GMC-registered doctors
Prescription review and approval
Basic safety monitoring and side effect guidance
However, they don’t offer:
Daily access to nutritionists/dietitians
Structured behavioural change programme
Psychology-based coaching
Peer support groups
Digital habit-tracking tools
Comprehensive maintenance programme
This limited support means you’re mainly on your own to figure out how to eat, manage side effects, and build habits that last beyond medication.
Second Nature’s comprehensive support
Second Nature provides access to registered dietitians and nutritionists who specialise in supporting people on weight-loss medications.
These qualified professionals are available five days a week via both group and private chat.
A key element missing from medication-only approaches is peer support. Second Nature places you in a small group with others on similar journeys, creating a supportive community where you can share experiences and strategies.
This combination of professional and peer support becomes particularly valuable when:
Managing nausea and other side effects
Navigating restaurant meals and social events
Planning for post-medication life
Staying motivated through plateaus
Cost vs value analysis
At first glance, MedExpress appears significantly cheaper:
MedExpress pricing:
Wegovy: £99.99-£199.99/month depending on dose
Mounjaro: £149.99-£199.99/month
Note: Price increases expected from September 2025 for Mounjaro
Second Nature pricing:
Wegovy: £149-£249 a month (£50 off first month)
Mounjaro: Pricing to be confirmed by October 2025
Includes medication, delivery, app access, coach support, and group programme
However, when considering value rather than just price, the equation changes substantially:
Total cost of change perspective
Medication-only approach:
Lower initial cost
Higher risk of weight regain after stopping (research shows 11% weight regain within one year)
Potential cost of additional weight-loss attempts
No skill development for long-term maintenance
Comprehensive programme approach:
Higher initial investment
Lower risk of weight regain (Second Nature’s preliminary data shows only 3.2% weight regain at five months after stopping the medication)
Skill development for lifetime weight management
NHS-validated approach with published outcome data
When calculated as cost-per-kilogram-lost-and-maintained, comprehensive programmes often provide better long-term value despite higher upfront costs.
Customer experience reality
While both services receive positive reviews overall, recent customer experiences show significant differences.
MedExpress service issues
Recent Trustpilot reviews for MedExpress (4.4/5 stars across 34,000+ reviews) show declining service quality with key problems including:
Severe order processing delays – customers waiting 2-3+ weeks for medication
Poor customer service – automated responses, long phone waits, unanswered emails
Prioritising new customers over existing ones during supply shortages
Lack of communication about delays or order status
Reddit discussions also mention mixed experiences, with increasing complaints about delays, as some customers report switching to competitors due to service issues.
Second Nature’s consistent service
Second Nature maintains a 4.6/5 Trustpilot rating across 7,600+ reviews, with consistent positive feedback about:
Responsive support from health coaches
Reliable medication delivery
Clear communication
Effective app functionality
Supportive group environments
Safety and ethical considerations
Recent regulatory concerns highlight important differences in the approach to patient safety.
In June 2025, a BBC investigation exposed MedExpress for “bypassing safety regulations,” allowing undercover reporters to obtain weight loss medications by falsifying health information without proper medical verification. Key concerns included:
Inadequate verification of patient eligibility
Failure to conduct proper medical consultations
Potential safety risks for patients
In contrast, Second Nature’s NHS partnerships and six-year history of delivering NHS-commissioned services demonstrate a commitment to high clinical standards and ethical practice.
The NHS typically conducts rigorous due diligence before partnering with healthcare providers, including:
Clinical governance review
Data security assessment
Evidence-based practice evaluation
Safety protocol verification
These standards provide additional reassurance about the quality and safety of the service you’ll receive.
Long-term success factors
The ultimate measure of any weight management programme lies in sustainable results, not just initial weight loss.
The post-medication transition
Research consistently shows that without addressing underlying habits and behaviours, weight regain after stopping medication is common.
Studies of GLP-1 medications show an average weight regain of 11-14% within a year of stopping medication.
Research on weight regain after stopping weight-loss medications suggests that it’s essential to develop healthy habits while taking the medication to ensure long-term success.
Second Nature’s approach to sustainable results
Second Nature’s programme is explicitly designed with post-medication life in mind:
Focus on sustainable habit formation from your first day
Personalised transition plans for maintaining results after medication
Ongoing access to support resources even after completing the programme
Community support from others at similar stages
Preliminary data from Second Nature suggest that participants who develop sustainable habits while on medication maintain significantly better weight control after stopping, with only 3.2% weight regain at five months.
Who should choose each option?
Consider Second Nature if you:
Want comprehensive support alongside medication
Value daily access to registered dietitians/nutritionists
Are concerned about maintaining results after medication
Appreciate group support and accountability
Have tried medication-only approaches before without lasting success
Value the reassurance of NHS-validated programmes
Consider MedExpress if you:
Are primarily focused on medication access at a lower cost
Feel confident managing your weight loss journey independently
Have strong self-motivation and existing nutrition knowledge
Are comfortable navigating potential service delays
Plan to stay on medication long-term rather than transitioning off
Are willing to accept some uncertainty around regulation and verification
Take home message
While MedExpress offers more affordable medication access, Second Nature provides a comprehensive weight loss solution that combines medication with professional support, a peer community, and habit-change strategies necessary for lasting results.
The price difference reflects substantial added value: daily access to registered dietitians, an evidence-based behaviour change programme, and strategies for maintaining weight loss beyond medication.
Recent service issues and regulatory concerns with MedExpress underscore the importance of selecting a trusted provider with robust clinical governance and established NHS partnerships.
The right choice depends on your priorities: if access to the lowest-cost medication is your main concern, MedExpress may be enough.
If you want comprehensive support and lasting results, Second Nature’s approach offers greater long-term value despite the higher initial investment.
Lose weight your way and keep it off
GLP-1 medication, expert support, and a programme that fits your life
Second Nature's Mounjaro and Wegovy programmes
Second Nature provides Mounjaro or Wegovy as part of our Mounjaro and Wegovy weight-loss programmes.
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 and Wegovy) 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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