DietFYI • Diet Guides • How-To • Reviews
Updated 2026
Practical, research-reviewed guidance for popular diets and supplements.
Clear guides to Paleo, Keto, Atkins, Mediterranean, 18-hour fasting, and PCOS diets— plus ingredient explainers and balanced supplement reviews to help you make informed decisions.
✔ Consumer-friendly
✔ Evidence summaries
✔ Clear pros & cons
✔ No hype tone
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Diet Guides
Beginner to advanced
How-To
Plans, routines, checklists
Ingredients
Dosage + safety notes
Reviews
Balanced pros/cons
Start here
Today’s most useful starting points
High-value hubs for quick orientation and deeper learning.
Diet Hub
Keto Diet
Macros, food lists, and common mistakes.
Top★★★★★
- Beginner setup + food list
- Electrolytes & adaptation tips
- How-to guidance for consistency
Diet Hub
Mediterranean Diet
Sustainable eating with simple swaps.
Top★★★★★
- Food list + meal structure
- Easy consistency strategies
- Beginner-friendly approach
Fasting Hub
18-Hour Fasting
Schedules, what breaks a fast, tips.
Top★★★★★
- Sample schedules + routines
- What breaks a fast (quick rules)
- Hydration & electrolytes
PCOS Hub
PCOS Diet
Balanced guidance for real life.
Top★★★★★
- Blood sugar-friendly habits
- Meal structure + examples
- Evidence summaries + cautions
Browse by topic
Your core diet hubs
Click into a hub to find how-to guides, food lists, and related supplement notes.
🥩 Paleo Diet
Whole foods approach + practical how-to.
🥑 Keto Diet
Low-carb structure + beginner setup.
🥓 Atkins Diet
Phased low-carb approach, explained.
🥗 Mediterranean Diet
Sustainable, balanced lifestyle pattern.
⏳ 18-Hour Fasting
Routines, rules, and how-to guidance.
🌿 PCOS Diet
Supportive habits + evidence summaries.
Featured pillar
Compare Diet Types: Which One Fits Your Life?
A practical guide to choosing a diet style based on goals, preferences, and sustainability— with simple “how to start” steps and common pitfalls.
Quick compare
Diet types at a glance
Educational overview — not medical advice.
| Diet | Best For | Focus | Difficulty | Start |
|---|---|---|---|---|
| Keto | Carb control | Low carb, higher fat | Medium | Guide |
| Paleo | Whole foods | Minimally processed | Easy–Medium | Guide |
| Mediterranean | Sustainable | Balanced pattern | Easy | Guide |
| Atkins | Phased low carb | Carb progression | Medium | Guide |
| 18-Hour Fasting | Time structure | Eating window | Easy–Medium | Guide |
| PCOS Diet | Blood sugar | Supportive habits | Medium | Guide |
Supplements
Supplement education & reviews
Browse your supplements hub for informational breakdowns and balanced reviews.
Explore the Supplements Hub
Find ingredient explainers, “what it does,” safety notes, and practical guidance.
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Includes: diet updates (Paleo/Keto/Atkins/Mediterranean), fasting tips, PCOS notes, and supplement explainers.