Information for every stage of major weight loss

Every stage of weight loss,
explained.

Whether you are starting to lose weight, part-way through, or living with loose skin after a large loss, this site explains the options and the evidence, from the practice of Dr Rohit Kumar, specialist plastic surgeon. Medications. Surgery. Nutrition. And what comes after.

Explore your pathway Already lost the weight?

FRACS Specialist Plastic Surgeon

APD Accredited Practising Dietitian

20+ Years surgical experience

Sydney Westmead · Penrith · Orange

Explore

“Significant weight loss is one of the most remarkable things the human body can accomplish. Understanding the pathways, the science, and what happens after — that’s what this resource is built for.”

Evidence-based · Sourced · Australian

Your pathway

Every journey is different.
All paths lead here.

Significant weight loss rarely follows a single route. Most people who keep weight off long term combine approaches — and all pathways, in time, raise the same question about skin. This is where we answer it.

Ozempic Mounjaro Wegovy

Medications

Ozempic, Mounjaro and Wegovy have changed medical weight loss. We explain exactly how each works, what the real-world numbers look like, and what happens to your body — including your skin — as the weight comes off.

20.2%

avg loss on tirzepatide (SURMOUNT-5 trial)

Learn more →

Gastric Sleeve Bypass Banding

Weight Loss Surgery

Gastric sleeve, Roux-en-Y bypass and adjustable banding remain the most effective interventions for significant long-term weight loss. Explained plainly, without the promotional language that surrounds this space.

80%

excess weight loss (bypass)

Learn more →

Nutrition Science Resistance Training Maintenance

Diet & Exercise

The hardest path — and for many, the most meaningful one. We explain the physiology of fat loss, protein targets, resistance training, metabolic adaptation, and what it actually takes to sustain the result long term.

Lasting

with the right approach

Learn more →

The real picture

Most people use more
than one approach.

Medication-assisted weight loss is supported by dietary advice. Bariatric surgery depends on specialist nutrition for life. Diet and exercise are the foundation regardless of what else you do. Your journey is probably a combination — and this site is built to support all of it.

See how nutrition connects everything →

Common combinations

💊 GLP-1 Medication + 🥗 Dietitian Support

Medication suppresses appetite — dietitian optimises protein and preserves muscle. Together, they produce better body composition than either alone.

🏥 Bariatric Surgery + 🥗 Pre & Post Nutrition

Surgical success is determined as much by nutritional preparation as by the procedure itself. Pre-hab protocols significantly improve outcomes.

Lifestyle Changes + Body Contouring

Years of disciplined weight loss often leave behind skin that exercise cannot address. When loose skin is what remains, body contouring surgery is a separate decision with its own risks.

Specialist Nutrition · All pathways

Your results are made
in the kitchen — and the clinic.

“Surgical success starts with what’s on your plate — long before you reach the operating table.”

Amy Kellner is one of Australia’s only dietitians who works exclusively with weight loss and cosmetic surgery patients. Her Personalised Surgical Nutrition Protocol has been refined across hundreds of patients to deliver better surgical outcomes, faster recoveries and results that last.

Accredited Practising Dietitian (APD)

BHSc Nutritional Medicine · Masters Nutrition & Dietetic Practice

Telehealth consultations · Available nationally

Collaborates with Dr Kumar's surgical team

Meet Amy → Book with Amy

The part no one prepares you for

Weight lost.
Skin left behind.

Significant weight loss — by any pathway — frequently results in excess, loose skin that exercise, nutrition and time cannot resolve. This is not a failure. It is a predictable biological consequence of remarkable change.

70–80%

of patients who lose significant weight develop clinically significant skin excess

3–6 mo

of weight stability before body contouring surgery is commonly recommended before planning surgery

Explore body contouring surgery →

Your surgical specialist

Dr Rohit Kumar
FRACS

Specialist Plastic Surgeon, Fellow of the Royal Australasian College of Surgeons. Over 20 years of surgical experience, with a focus on body contouring surgery after major weight loss, cosmetic and reconstructive surgery — with a particular focus on the surgical completion of the weight loss journey.

Dr Kumar sees patients at his clinics in Westmead, Penrith and Orange NSW, and welcomes international patients from Fiji, Dubai, India and the Pacific region. Initial consultations are available via video for those travelling from interstate or overseas.

MBBS · MMedSci (Burns) · FRACS (Plas) · ANZBCPS Board Certified
Ahpra registered — MED0001630444
International patients: Fiji · Dubai · India · Pacific region

Book a consultation Visit drkumar.com.au

Dr Rohit Kumar, specialist plastic surgeon

FRACS

Specialist Plastic Surgery

APD

Accredited Practising Dietitian

20+ Years

Specialist surgical experience

3 Clinics

Westmead · Penrith · Orange

International

Fiji · Dubai · India · Pacific

1300 267 726

Direct enquiries

The Weight-Loss Medication Guide open on a tablet

Free guides

Five guides. Read them anywhere.

Weight-loss medicines, bariatric surgery, nutrition, health checks, and when to think about loose skin. Written by Dr Rohit Kumar’s practice with Accredited Practising Dietitian Amy Kellner, and emailed to you as a PDF.

Browse the free guides

The journal

Articles and research summaries

View all articles →

GLP-1 Medications July 2026 10 min read

Ozempic vs Mounjaro — what the research shows

Both are GLP-1 receptor agonists. Both produced substantial average weight loss in clinical trials. But they are not the same drug, they do not work identically, and the difference in outcomes — an average of 20.2% of body weight on tirzepatide versus 13.7% on semaglutide in the SURMOUNT-5 trial — matters enormously when planning a surgical journey.

Read the article →

Ready to begin?

Start your conversation
with our team.

Whether you are researching options, ready for a dietitian consultation, or prepared to discuss body contouring surgery — the first step is a conversation. Our team responds within one business day.

Book a consultation → 📞 1300 267 726

Westmead · Penrith · Orange · Video consults · International patients welcome

Every stage of weight loss,
explained.