The Smoothie Diet (21 Day Program) review
A 21 day structured smoothie plan for people who want the food decisions made for them
By the RJ Editorial Team. Sales page checked 2026-09-23. Last updated 2026-09-23.
Is it worth it?
Maybe you've got something coming up, a wedding or a holiday, or you're just tired of feeling heavy and flat by mid afternoon and sick of deciding what to eat every single day. That's usually who ends up on this page. The Smoothie Diet is a three week plan where blended smoothies take the place of most of your meals, with one proper meal and a snack left in, in a set sequence. The structure is the real mechanism here. Taking the daily food decision away tends to cut your calories without you counting anything, which is why plans like this do work in the short term for a lot of people. The page sells it much harder than that. Stories of 8 pounds in a week, glowing skin, belly fat gone, all of it testimonial with no study behind it and a results may vary note underneath. Read those as advertising, and know that a dramatic first week on any plan like this is mostly water. Day to day it's simple: shop at the weekend, blend in the morning, eat one normal meal. What you're paying for is three weeks of someone else deciding, which is genuinely worth something if decision fatigue is your problem rather than knowledge.
Pros
- Cheap compared to any coached plan or meal kit
- No counting, weighing or app required
- Simple enough to start the same day you buy
- Three weeks is short enough to actually finish
Cons
- Claims rest entirely on customer stories, not evidence
- The listing is set up for recurring billing, which the sales page does not explain
- Weight often comes back when you stop, because nothing teaches you normal cooking
- You need a decent blender and fresh produce every few days
What you get
Downloadable PDFs you get straight after paying. A day by day 21 day schedule, the smoothie recipes set out in the order the plan wants them (the ingredient ratios shift week to week), plus shopping lists, prep notes and ingredient swaps. It is all digital. Nothing is posted to you, and no food, powder or blender is included.
Before you buy
- Read the checkout screen line by line for any subscription or rebill, and find the cancel instructions before you pay
- Check the stated refund window and how you claim it, since the countdown and discount on the page are permanent fixtures
- Price up a week of fruit, veg and greens where you shop, and talk to a doctor first if you're pregnant, diabetic or on medication
Who it suits
Someone who does better with a rigid plan than with advice, wants a defined three week reset, and will realistically blend most mornings
