Ttrimsy
The weight-loss landscape

Seven approaches.
One honest comparison.

There is no single “best” way to lose weight. The most sustainable results come from understanding your options and combining approaches that fit your life, preferences, and health situation.

Why combining approaches works best

Every method on this page has merit, and every method has limitations. Research consistently shows that the people who successfully lose weight and keep it off are those who combine multiple strategies — typically a moderate calorie deficit, adequate protein, regular exercise (especially strength training), and sustainable behavioural changes.

GLP-1 medications can be a powerful tool in this toolkit, but they’re one option among many. Whether you choose medication or not, the lifestyle foundations below will determine your long-term success.

Core lever 01
Moderate deficit
Core lever 02
Adequate protein
Core lever 03
Resistance training
All approachesGLP-1 MedicationsCalorie DeficitHigh-Protein DietIntermittent FastingStrength TrainingHabit-BasedCombined approaches
Strong evidence

GLP-1 Medications

Prescription medications that reduce appetite and aid weight loss. Mounjaro, Wegovy, Ozempic.

What it is

  • Weekly injection mimicking gut hormones that regulate appetite
  • Typical loss: 15–22% of body weight over 12–18 months
  • Prescribed on NHS for BMI 35+ with comorbidity; privately from BMI 27+
  • Requires long-term commitment — weight returns on stopping

Watch for

  • Nausea, fatigue, especially during dose escalations
  • Muscle loss if protein target is missed on low appetite
  • Cost: £150–£250/month privately once self-funding
  • The “off the medication” phase — its own sport
Best for: BMI 30+, significant loss target, plateau on diet alone
Compare GLP-1 medications →
Strong evidence

Calorie Deficit

The foundation every other approach sits on. Eat fewer calories than you burn, consistently.

What it is

  • Track intake until you can eyeball portions reliably
  • Target a 300–500 kcal daily deficit for 0.5–1 kg loss per week
  • Works regardless of medication, diet style, or exercise
  • Most flexible — any food fits if totals fit

Watch for

  • Tracking burnout around week 6–8
  • Under-eating protein if deficit is aggressive
  • Weekend drift — a typical 5× on, 2× off week wipes the deficit
Best for: Anyone — it’s the baseline under everything else
Read the full guide →
Strong evidence

High-Protein Diet

Protein-first eating. Protects muscle on a deficit. The single biggest lever on GLP-1s.

What it is

  • 1.4–2.0g protein per kg of goal bodyweight, daily
  • Higher satiety per calorie than carbs or fat
  • Preserves lean mass during weight loss
  • Compatible with any diet style — vegan through omnivore

Watch for

  • Hitting the target is hard on suppressed appetite
  • Processed high-protein foods can creep up calories
  • Vegetarian/vegan paths need more planning
Best for: Everyone — especially GLP-1 users and lifters
Browse protein-first meals →
Moderate evidence

Intermittent Fasting

Time-restricted eating. Works if it reduces total intake; no magic beyond that.

What it is

  • Common patterns: 16:8, 18:6, 5:2
  • Simpler rules than tracking for some people
  • Can improve insulin sensitivity markers
  • No intrinsic advantage at matched calories — it’s a compliance tool

Watch for

  • Under-eating protein on a 6–8 hour window
  • Binge compensation during the eating window
  • Poor fit for shift workers, athletes, pregnancy
  • Badly paired with GLP-1s — double appetite suppression
Best for: Structured eaters who prefer rules over tracking
Read the full guide →
Strong evidence

Strength Training

Resistance training 2–3× per week. Non-negotiable on any weight-loss path.

What it is

  • Compound lifts, bodyweight, bands, or machines — all work
  • Protects muscle on a deficit (the other half of the protein story)
  • Raises resting metabolic rate
  • The single strongest predictor of maintenance success

Watch for

  • Cardio-only plans burn lean mass alongside fat
  • Under-recovery on high deficits — eat more on training days
  • Day 1 intimidation — start smaller than you think
Best for: Everyone — especially those on GLP-1s or over 40
See training plans →
Moderate evidence

Habit-Based

Change the defaults, not the discipline. Slower results, higher stickiness.

What it is

  • One small change every 2–4 weeks until it’s automatic
  • Protein at breakfast · walk after dinner · no eating standing up
  • Loss rate: slower, often 0.25–0.5kg/week
  • Excellent maintenance scaffold after faster methods

Watch for

  • Too slow for people with a deadline or medical urgency
  • Easy to stack “habits” that never actually land
  • Needs pairing with at least one measurable metric
Best for: Long-horizon goals, maintenance, post-GLP-1
Find your phase →
Not sure which to pick?

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Based on your medication status, diet preferences, and where you are in the journey.

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