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Last updated: October 28, 2026 · By Martin Smith · How I research
Almost every weight-loss supplement sold online promises a “money-back guarantee”. The details behind that promise vary a lot: how many days you get, when those days start counting, whether you have to post the bottles back, and what you won’t get refunded. Those details decide whether a refund actually happens.
This page puts the refund terms of 10 supplements and diet programs side by side. All of them are sold through ClickBank, and I’ve reviewed each one. The terms come from each vendor’s own refund policy or sales page, as summarised in my reviews, checked during October 2026. Vendors change their terms, so confirm the current policy before you buy.
The short version: the guarantees run from 60 to 365 days, but the start date matters as much as the length. Some count from the day you order, some from the day it ships and one from the day it’s delivered. Eight of the ten ask you to send the product back, usually at your own cost, and none of them say they refund shipping.
Supplement money-back guarantee terms compared
| Product | Guarantee | Clock starts | Send product back? | Not refunded | How to claim |
|---|---|---|---|---|---|
| BellyFlush | 365 days | Purchase date | Yes: used, unused or empty bottles, to the US returns centre | Original shipping is free, so nothing to lose there | Return the bottles with your name and order ID, then email support@mysimplepromise.com with the tracking number |
| Fast Lean Pro | 180 days | Delivery date | Yes: all jars, empty or not | Return postage | Email contact@fastleanpro-product.com with “Refund Request” in the subject, then send the jars back |
| Science Natural Berberine | 180 days | Purchase date (the bottles must arrive back within 180 days) | Yes: all bottles, empty ones accepted | Shipping costs; return postage is yours | Contact support first, then return the bottles with your invoice and confirmation number |
| Trimology | 180 days | Purchase date | Yes, under the written return policy (the sales page says no return is needed) | Return postage | Email support@trimologyweight.com for a return number (RMA), then post the product within 14 days |
| Mitolyn | 90 days | Order date | No | Shipping; customs charges outside the US | ClickBank order support (clkbank.com), phone, or contact@mitolyn.com |
| Okinawa Flat Belly Tonic | 90 days (other pages of the vendor’s site say 6 months) | Shipping date | Yes: all containers, empty or unopened | Return postage | Email support@flatbellytonic.com with “Refund Request” in the subject and wait for confirmation before posting |
| Leptozan | 90 days (the shipping policy page says 180) | Shipping date | Yes: all bottles, empty, part-used or full | Return postage | Email refunds@leptozan.com with “Leptozan Refund” as the subject, wait for confirmation, then post with tracking |
| Java Burn | 60 days | Order date | Yes: bottles or pouches, even empty ones | Shipping and handling; return postage | Contact support@javaburn.com or phone first, then return with your ClickBank invoice and order number |
| HepatoBurn | 60 days | Purchase date | Yes: bottles, even empty ones | Shipping and handling | Phone or email via support.hepatoburn.com, then return the bottles |
| The Smoothie Diet | 60 days | Not stated (“within 60 days”) | No: nothing to return | Nothing stated | Email support@healthcoachdrew.com, or ClickBank order support (clkbank.com) |
Sorted by guarantee length. Each product name links to my full review, where the source for these terms is given.
What stands out
The start date can cost you weeks
A 90-day guarantee that starts on the order date is shorter in practice than it sounds. If delivery takes a week, or you leave the bottles unopened for a fortnight, you’ve used up part of your window before you’ve tried the product. Mitolyn and Java Burn count from the order date. Okinawa Flat Belly Tonic and Leptozan count from shipping. Fast Lean Pro is the only one here that counts from delivery, which is the fairest for buyers.
“No questions asked” usually means “post it back first”
Only Mitolyn and The Smoothie Diet don’t ask for anything back. Everyone else wants the product returned, often every bottle including empty ones, and most expect you to pay the postage. For international buyers sending parcels to the US, that can take a real bite out of a refund.
Some vendors contradict themselves
Three vendors give different terms on different pages of their own sites. Okinawa Flat Belly Tonic’s refund policy says 90 days while other pages say 6 months. Leptozan’s sales page says 90 days while its shipping policy says 180. Trimology’s sales page says no return is needed while its written policy asks for one. When pages disagree, assume the stricter one applies and ask support to confirm in writing.
The guarantee can be shorter than the suggested trial
HepatoBurn’s maker suggests taking it for 3 to 6 months, but its guarantee lasts 60 days. Java Burn’s maker suggests 90 to 180 days of use against a 60-day guarantee. If you want the safety net, you have to decide before you’ve followed the maker’s own advice.
How to protect your refund
- Buy only from the official site. Every guarantee here applies to purchases made through the vendor’s own sales page. Amazon, eBay and other marketplace listings usually aren’t covered. My guide to spotting fake “official” supplement websites shows how to check.
- Write down the start date. Note whether your guarantee counts from the order, shipping or delivery date, and put a reminder in your calendar two weeks before it ends.
- Keep everything. Keep the bottles, jars or pouches, including the empty ones, and the outer packaging, until you’re sure you’re keeping the product.
- Keep your ClickBank receipt. It has the order number vendors ask for. If a vendor doesn’t respond, ClickBank’s customer support at clkbank.com handles orders it processed.
- Contact support before posting anything. Most vendors want you to email first and wait for return instructions. Parcels sent without that step can be delayed or refused.
- Use tracked postage. Keep the tracking number until the refund shows on your statement.
Frequently Asked Questions
Which supplement here has the longest money-back guarantee?
BellyFlush, at 365 days from purchase, according to the manufacturer. You still need to send the bottles back.
Which ones don’t make you send the product back?
Mitolyn, according to its refund policy, and The Smoothie Diet, which is a digital program with nothing to return.
Do these guarantees cover marketplace purchases?
Generally not. The guarantees apply to orders through each vendor’s official sales page, where ClickBank processes the payment.
Is shipping refunded?
Not that I found. Where vendors mention shipping, they exclude it from the refund, and where a return is required, the postage is usually yours to pay.
Affiliate disclosure: Go Health Reviews earns a commission if you buy some of these products through links on my review pages, at no extra cost to you. This comparison contains no affiliate links. Refund terms are summarised from each vendor’s published policies and may change; always check the current policy before you buy. This page is general information, not legal or financial advice.