GLP3, retatrutide and GLP3-B
GLP3-B is a once-a-day capsule sold direct by the manufacturer. Six listed ingredients, a 60-day money-back guarantee, and free delivery from two packs. Here is what every pack costs at checkout today.
The short answer
What people mean when they search GLP3
Type “GLP3” into a search box and most of what comes back is about retatrutide. GLP3 is the nickname retatrutide has picked up online: it is an investigational injectable peptide, still going through clinical development, and it is not authorised for sale to the public anywhere. It is written about in trial coverage, forum threads and news pieces, which is why the shorthand spread faster than the full name.
GLP3-B, the product on this site, is a food supplement in capsule form and is not the injectable peptide. The two names sit close enough together that a search for one routinely turns up the other.
In forum threads the full name is usually cut down again to reta, so “GLP3 reta”, “GLP3 peptide” and “GLP3 retatrutide” are all the same question. Retatrutide is the reason the search term exists, so it is set out properly first, and the rest of this page is about GLP3-B — what is in it, how it is taken, what the maker states about GLP3-B side effects, and how it is sold.
The peptide
Retatrutide, and why it is not on sale
Retatrutide is an injectable peptide that has been studied in clinical trials. “Investigational” is the operative word: it means the work is still going on and no regulator has authorised it for public sale. Neither the MHRA in the UK nor the EMA in Europe has licensed it, so it has no marketing authorisation and no approved patient information leaflet behind it.
The practical consequence is simple. No pharmacy can dispense it, no shop can legally sell it, and anything advertised under the GLP3 name outside that system is not coming through a regulated route. The MHRA has publicly warned people off buying unlicensed injectables online. We do not sell it, we cannot source it, and we will not point you at anybody who says they can.
That also settles the question of side effects for the peptide. An unapproved compound has no established public safety profile to quote, and anyone claiming otherwise is guessing. If retatrutide is genuinely what you came to read about, the next conversation belongs with your GP or pharmacist rather than with a website.
The capsule
What GLP3-B is
GLP3-B is a food supplement sold as a swallowable capsule, taken once a day. There is nothing to mix, measure or refrigerate — it is one capsule swallowed with water — and, because a food supplement is not a medicine, it is sold under different rules from one.
A carton holds 30 capsules, which is one month at the stated intake of one a day. That is why the packs are described in months rather than by capsule count — one carton is 30 days, two are 60, three are 90. Nothing about the routine changes with the pack size; the bigger cartons simply mean fewer reorders.
Six ingredients are named on the manufacturer’s checkout: spirulina, matcha, L-carnitine, L-arginine, apple cider vinegar extract and zinc. No amounts are published for them, so we print none. The manufacturer’s own product page carries the rest of the label information alongside each pack, and that is the place to read it in full before you order.
Taking it
One capsule a day
One capsule, once a day, swallowed with water. The maker asks you not to exceed that intake, and a food supplement is meant to sit alongside a varied and balanced diet rather than stand in for one.
The intake does not change over time: the same one capsule on the first day as on the ninetieth. That makes it easy to attach to something you already do daily — lunch, dinner, or whichever meal is the reliable one in your week — and easy to keep up without having to think about it.
The useful thing is to take it at roughly the same point in the day and keep the rest of your routine steady while you do. There is nothing to time to the minute, and stopping is just as undramatic: you simply stop taking it.
What is listed
GLP3-B side effects, as the manufacturer states them
The manufacturer lists one side effect: dry mouth, described as rare and affecting up to 1 in 1,000 users. It also states that GLP3-B has no effect on the contraceptive pill and none on high blood pressure, and that you can drive and operate machinery as normal while taking it.
It is not recommended for under-18s, or while you are pregnant or breastfeeding. Those are the maker’s own restrictions on its product, and they are worth reading before you order rather than after. They are short, and they are the whole of what it sets out on the subject.
If you take prescription medication or have a medical condition, speak to your doctor or pharmacist first and show them the six ingredients listed above — that is the part they will want to see.
Packs and delivery
How GLP3-B is sold
GLP3-B is sold direct by its manufacturer rather than through pharmacies or high-street shops, which is why looking for it in the usual places turns up nothing. Orders go through the manufacturer’s own checkout, and each pack’s price is shown on its own card here.
There are three pack sizes: one carton for 30 days, two for 60 and three for 90. Delivery is free on the two-pack and the three-pack; the single pack carries a delivery charge, shown at the checkout before you confirm.
Every order is covered by the 60-day money-back guarantee stated on that checkout. Read its terms there when you order — what has to go back, in what condition and to which address — so you know where you stand before you buy rather than afterwards.
Packages & prices
Choose your pack
These are the official UK checkout's own prices, read on the date stamped below. Delivery is free on the two- and three-pack. The three-pack is the lowest price per pack.
Prices checked 26 August 2026 at checkout3 packs
90-day supply — lowest price per pack
3 × £59.95 bought separately = £179.85
£36.65 per pack
Checkout at the shop
2 packs
60-day supply — delivered free
2 × £59.95 bought separately = £119.90
Checkout at the shop
You order at checkout, where the 60-day money-back guarantee is stated. We do not take payments and never see your details.
Reviews
Rated 4.8 out of 5
Rating and customer count published by the maker, read 26 August 2026
60 days to decide
Order it, take it, and the money-back guarantee runs for 60 days.
Free delivery from 2 packs
Delivery is included on the two- and three-pack.
Straight from the maker
You buy from the manufacturer, not from a reseller.
Secure checkout
Payment is handled by the shop, with PayPal and Klarna.
Inside the capsule
The six ingredients
Six ingredients, one capsule a day.own checkout.
Natural Energy & Focus
Spirulina and Matcha provide natural nutrients and antioxidants that can help support energy levels and improve concentration in daily life.
Supports Metabolism & Activity
L-Carnitine and L-Arginine are well-known amino acids that play a role in energy metabolism and can support physical performance.
Supports Digestion & Balance
Apple cider vinegar extract is traditionally used to support digestion and promote a balanced sense of wellbeing.
Supports the Immune System & Cell Protection
Spirulina and Zinc help supply the body with essential nutrients and support immune function.
How you take it
One capsule a day with two large glasses of water, 15 to 30 minutes before or with lunch or dinner. If capsules are difficult, the maker says it can be opened and the contents stirred into water.
What it is
GLP3-B is a food supplement — not a medicine and not a prescription treatment. Speak to your doctor if you take medication, are pregnant or breastfeeding, or have a medical condition.
Questions
Asked and answered
What does GLP3 mean?
Online, GLP3 is used as shorthand for retatrutide, an investigational injectable peptide that is still in clinical development and is not authorised for sale to the public. It is not something a pharmacy in the UK can dispense.
Is GLP3-B the same as retatrutide?
No. GLP3-B is a food supplement in capsule form, swallowed once a day, with six ingredients listed on the manufacturer’s checkout: spirulina, matcha, L-carnitine, L-arginine, apple cider vinegar extract and zinc. It is not the injectable peptide.
Does GLP3-B have side effects?
The manufacturer lists one: dry mouth, described as rare and affecting up to 1 in 1,000 users. It states there is no effect on the contraceptive pill and none on high blood pressure, and that you can drive and operate machinery as normal. It is not recommended under 18, or while pregnant or breastfeeding.
Where can I buy GLP3-B?
Direct from the manufacturer, on its own checkout, rather than from pharmacies or high-street shops. A carton holds 30 capsules, or one month. Delivery is free on the two- and three-pack, and every order carries the 60-day money-back guarantee stated at the checkout.
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