100% Free
100% Free
Compare popular diet approaches — principles, what to eat, and who each suits best
There is no single diet that works best for everyone. Different approaches suit different lifestyles, preferences, medical backgrounds and goals. What they share is that any diet producing sustainable results will include adequate protein, mostly whole and minimally processed foods, and a calorie balance aligned with your goal.
This guide covers eight of the most widely followed diet frameworks, outlining the key principles, typical food choices and who each approach tends to suit best. The descriptions are designed to help you understand each approach accurately — not to promote any single one as superior. The best diet is one you can maintain consistently over the long term.
Each program can be paired with the free 7-day meal planner on this site, which generates a week of meals aligned to your chosen dietary style. You can also use the calorie calculator first to establish your calorie target before selecting a plan.
Select any of these 8 diet programs in the interactive planner and generate a free 7-day meal plan.
Open Diet Planner →| Diet | Main restriction | Protein | Difficulty |
|---|---|---|---|
| Keto | Carbs (<50g/day) | Moderate–high | High |
| Mediterranean | Processed foods | Moderate | Low |
| High Protein | None specific | High | Low–medium |
| Vegan | All animal products | Requires planning | Medium |
| DASH | Sodium, red meat | Moderate | Low |
| Paleo | Grains, dairy, legumes | High | Medium |
| Intermittent Fasting | Eating window | Variable | Low–medium |
| Montignac | High-GI foods | Moderate | Medium |
With so many dietary approaches available, choosing the right one can feel overwhelming. The most important factor is not which diet is theoretically "best" — it's which diet you can follow consistently for months or years. A perfect diet that you abandon after three weeks produces worse results than a moderate diet you maintain for a year.
Consider these practical factors when choosing:
Your food preferences. If you love bread and pasta, a strict keto diet will be difficult to sustain. If you enjoy cooking with olive oil, vegetables and fish, the Mediterranean approach will feel natural. Choose a framework that includes foods you genuinely enjoy eating.
Your lifestyle and schedule. Intermittent fasting suits people who prefer skipping breakfast and eating larger meals later. Meal prep-heavy approaches like high-protein diets work well for people with predictable schedules. If your eating times vary daily, a flexible approach like Mediterranean or DASH is more forgiving.
Your health goals beyond weight loss. If blood pressure management is a priority, DASH was specifically designed for this. If you're focused on building or preserving muscle, a high-protein approach is most effective. If long-term cardiovascular health is your concern, the Mediterranean diet has the strongest observational evidence.
Your budget and access. Some approaches are more expensive than others. Paleo and keto tend to cost more due to higher meat and specialty ingredient purchases. Mediterranean, DASH and high-protein diets can be followed affordably with staple foods like legumes, eggs, frozen vegetables and whole grains.
Despite their apparent differences, every diet programme that produces lasting results shares the same core principles. Understanding these shared foundations is more valuable than debating which specific approach is "best."
Calorie awareness. Whether explicitly counted or naturally reduced through food choices, every effective diet creates a calorie deficit for weight loss. Keto reduces calories by eliminating an entire macronutrient group. Intermittent fasting reduces calories by limiting the eating window. Mediterranean diets reduce calories through high-satiety whole foods. The mechanism differs, but the energy balance equation is the same.
Adequate protein. Every well-designed diet includes enough protein to preserve muscle mass, support recovery from exercise and maintain satiety. Most guidelines recommend at least 1.2 g per kg of body weight for sedentary adults, and 1.6–2.2 g per kg for those who exercise regularly. Use our Protein Calculator to find your target.
Predominantly whole foods. All eight programmes on this page prioritise minimally processed, nutrient-dense foods over ultra-processed alternatives. Whole foods provide more micronutrients, more fibre and greater satiety per calorie than their processed equivalents — regardless of whether those whole foods are plant-based, animal-based or mixed.
Sustainability. The programmes that produce lasting results are those people can maintain as a long-term lifestyle rather than a temporary restriction. Any diet you plan to "finish" and then return to your old eating habits will only produce temporary results. Choose an approach you can see yourself following, with reasonable flexibility, for the foreseeable future.
Research generally shows that multiple dietary approaches can produce similar weight loss outcomes when adherence is matched. The diet that works best for you is the one you can maintain consistently. Key factors for any successful approach include adequate protein, mostly whole foods and a moderate calorie deficit.
Ketogenic diets are generally considered safe for healthy adults in the short to medium term. Long-term data is more limited. Some individuals find it sustainable; others experience difficulty maintaining such low carbohydrate intake. Anyone with kidney disease, diabetes or other conditions should consult a healthcare professional before starting keto.
Yes. Many people cycle between approaches depending on the season, their goals or their circumstances. There is no requirement to commit permanently to a single dietary framework. What tends to matter more than the specific approach is consistency with the core principles — adequate protein, predominantly whole foods, appropriate calories.
Use the free diet planner on this site. Select your preferred calorie range and diet style, and the tool will generate a 7-day meal plan with breakfast, snacks, lunch and dinner tailored to that approach. You can reshuffle as many times as you like.
Not necessarily. Some approaches — like keto and intermittent fasting — naturally reduce calorie intake through food restrictions or time restrictions without explicit counting. Others — like high-protein and DASH — benefit from at least a rough awareness of portions and calories. If you're not losing weight on any diet, tracking calories for 1–2 weeks with our Calorie Calculator can reveal whether you're in a deficit or not.
The Mediterranean diet has the most extensive long-term observational research supporting cardiovascular and metabolic health benefits. DASH is similarly well-supported, particularly for blood pressure. However, "sustainable" is ultimately personal — the diet you can follow consistently for years, that includes foods you enjoy, and that meets your nutritional needs is the most sustainable one for you.
Absolutely. Many people take the best elements from multiple approaches: the protein emphasis from high-protein diets, the food quality focus from Mediterranean, and the time structure from intermittent fasting, for example. As long as you're meeting your calorie and protein targets with mostly whole foods, the specific label matters less than the overall pattern.
Generate a meal plan for keto, Mediterranean, vegan and more.
Find your daily calorie target before choosing a diet approach.
Essential reference for Montignac and low-GI eating approaches.
Understand proteins, carbs and fats before starting any diet.
Principles that apply regardless of which diet you follow.