Why So Tired?: A 101-Day Guide to Clearer Thinking, Lasting Energy, and Better Sleep

Category: Books & MediaHolisticRanked #99 of 440 in Books & Media
9.8Our score
Our verdict

Ranked #99 in Books & Media

Quick answer The Why So Tired?: A 101-Day Guide to Clearer by by Athan Smyrlis MD (Author) Format: Paperback scores 9.8/10 with us. Amazon owners rate it 4.9 out of 5 across 45 reviews, above the 4.5 average of the 347 products we track in Books & Media.

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Product information

7 specifications
Publisher‎ True Health Compass LLC
Publication date‎ January 9, 2026
Language‎ English
Print length‎ 456 pages
ISBN-13‎ 979-8994252109
Item Weight‎ 1.34 pounds
Dimensions‎ 6 x 1.14 x 9 inches

Why So Tired?: A 101-Day Guide to Clearer: questions & answers

Is the Why So Tired?: A 101-Day Guide to Clearer worth buying?

Yes, it is one of the stronger picks in its group. We score the Why So Tired?: A 101-Day Guide to Clearer 9.8 out of 10. Amazon owners rate it 4.9 out of 5 across 45 reviews, above the 4.5 average of the 347 products we track in Books & Media. The review count is still small, so treat the rating as an early signal.

What are good alternatives to the Why So Tired?: A 101-Day Guide to Clearer?

Similar, well-rated products in our catalog: by Jerome Puryear MD (Author) Format: Kindle Edition Sleep Deprivation: A Doctor's Guide to Why You (9.4/10, 4.7 stars from 38 owners); by John Gibbons (Author) Format: Paperback Muscle Energy Techniques (9.6/10, 4.8 stars from 115 owners); by Margaret Martin (Author) Format: Paperback Exercise (9.0/10, 4.5 stars from 973 owners).

Customer reviews

All reviews on Amazon
4.945 global ratings
5 star89%
4 star11%
3 star0%
2 star0%
1 star0%

Breakdown from the 9 most helpful reviews we imported.

E
Emily M.
Verified purchaseJanuary 22, 2026
Thank you!

Why So Tired is an uplifting and practical guide that focuses on simple lifestyle changes that can greatly improve sleep and long-term health. The book explains fatigue in a clear, approachable way and offers realistic steps that feel sustainable rather than overwhelming. Even by Day 5 of the 101-day program, it feels motivating and empowering, with a strong focus on habits that support lasting energy and overall well-being. A highly recommended read for anyone looking to improve their health from the ground up.

K
Kathleen Sodora
Verified purchaseMarch 18, 2026
Must read

Love this book! Motivating and practical. Easy to stick with. The day by day structure made the simple changes feel manageable.Simple steps that lead to meaningful results over time. I’m already sleeping better and have more energy.

K
Kevin Lynch
Verified purchaseJanuary 20, 2026
Very motivating and easy to follow

This book is practical, hopeful, and extremely easy to followThe daily format layout makes real changes feel doableThe authors writing is clear, compassionate and surprisingly very motivatingSimple steps that are outlined made a big impact over time My sleep and energy started improving in just a couple of weeks!

T
Teacher
Verified purchaseSeptember 20, 2026
An Amazing Change

If you are willing to do the work these practices really work. I started my journey at the end of May and within weeks I was sleeping a bit better. I didn't have to make too many chances since I already exercised daily and I was on a plant based healthly diet.The biggest change was leaving my phone downstairs at night and setting aside only a few times during the day to answer emails.. Once I got out of the habit, I moved on to another suggestion. I walk after every meal, get day light first thing in the morning and keep to a scheduled bedtime. I feel amazing and it wasn't that difficult. You

J
Jody Moran
July 6, 2026
Great book!

I enjoyed that this was broken into manageable piecesI resonated with this book on a deep level it felt like it was written for me. The message is clear, the one-page a day format makes it easy to start even when you’re already exhausted. It gave me the why’s and how’s and didn’t overwhelm me! Overall enjoyed this book very much!

A
Allison Burris
Verified purchaseJanuary 23, 2026
Amazing and helpful and enjoyable to read

I found this book to be very helpful. This Doctor brings science and every day practice to real life and helps you regain your vitality. I strongly recommend it to anyone at any age or stage in life. Transformational.

B
beryl
Verified purchaseJanuary 11, 2026
Worth reading if you’re tired

Very engaging and easy to read. It’s packed with practical, actionable tips for fatigue and poor sleep, and it genuinely helped me make changes right away. Day 77 spoke to my soul. Highly recommend!

I
Ioannis Athanasiadis
Verified purchaseJanuary 20, 2026
Really good read!!

“Insightful, practical, and genuinely reassuring. A rare health book that combines solid medical thinking with real empathy. Very helpful and easy to apply.”

Customer reviews are shown as published on Amazon and are not written by Do Best Deal.