Synaptigen: brain probiotic for memory, focus and clarity
A once-daily tablet built around the gut-brain connection. Three probiotic
strains, a prebiotic fibre to feed them, and two plant extracts — seven ingredients in all,
with no stimulants and nothing to wear off by mid-afternoon.
From $49 a bottle · free US shipping on 3 and 6 bottles ·
180-day money-back guarantee
180-day money-back guarantee
Free US shipping on 3 and 6 bottles
No stimulants, non-GMO
Retailer of record: BuyGoods
What Synaptigen is
Synaptigen is a once-daily probiotic tablet for memory, focus and mental
clarity. Each bottle holds 30 tablets, a one-month supply. The formula brings together three
probiotic strains — Lactobacillus paracasei, Lactobacillus reuteri and
Bifidobacterium lactis BL-04 — with inulin as a prebiotic fibre, tricalcium
phosphate, and strawberry and peppermint extracts. Seven ingredients, no stimulants, non-GMO.
Three probiotic strains
Lactobacillus paracasei, Lactobacillus reuteri and Bifidobacterium lactis BL-04, the last named right down to its strain code.
A prebiotic to feed them
Inulin from chicory root. Probiotics are the bacteria; the prebiotic is what they live on, which is why the two belong together.
One tablet, once a day
Thirty tablets a bottle, a month's supply. No powders to measure, no multiple doses to remember through the day.
No stimulants at all
Nothing caffeine-like in the formula, so there is no jitter and nothing to wear off in the afternoon.
Non-GMO formula
Stated on the official product page, alongside a natural-formula claim.
180 days to change your mind
The money-back window runs from the day your parcel arrives rather than the day you ordered.
How a probiotic supports the brain
Through the gut-brain axis, one of the most active areas in nutrition
research. The gut and the brain are in constant communication along three routes: directly via
the vagus nerve, through immune signalling, and through
metabolites such as the short-chain fatty acids bacteria produce when they
ferment fibre. That last route is exactly why the inulin is in the formula: it is the fuel that
fermentation runs on. Supporting the gut end of that conversation is the premise Synaptigen is
built on.
It is worth setting expectations honestly, because it affects how you judge the product. This
is a gradual, cumulative approach rather than a stimulant that announces itself within the hour.
The research in this field is genuinely promising and genuinely young, with most human studies
running four to twelve weeks. Give it that long before you form a view.
What's inside
Seven ingredients, and every one of them is named on the label.
Probiotic strainLactobacillus paracasei
One of the most widely used probiotic species in the world, found in fermented foods and studied for decades. It is a hardy strain family, which is part of why it turns up so often in commercial blends.
Probiotic strainLactobacillus reuteri
The strain family behind some of the most interesting work on the gut-brain connection. Research has explored how certain reuteri strains interact with the vagus nerve, the direct signalling line running between the gut and the brain.
Probiotic strainBifidobacterium lactis BL-04
Named all the way down to the strain code, which is genuinely uncommon on a supplement label and means the research is there to look up. BL-04 has been studied in its own right, including work on immune function in physically active adults.
Prebiotic fibreInulin
A prebiotic fibre drawn from chicory root. Probiotics are the bacteria; inulin is what feeds them. Pairing the two is what turns a bacterial blend into something the gut can work with rather than simply pass through.
MineralTricalcium phosphate
A calcium mineral that gives the tablet its structure and contributes a small amount of dietary calcium alongside it.
Plant extractStrawberry extract
Brings natural fruit polyphenols and a clean taste. Strawberries sit among the better-studied fruits for polyphenol content, and the flavour matters more than it sounds on something you take every morning.
Plant extractPeppermint extract
Finishes the flavour and adds a botanical with one of the longest traditional associations with digestive comfort of anything on this list.
How to take it
Take one tablet daily with a mealFood buffers stomach acid and gives the live cultures a better chance of surviving the trip. Anchor it to the same meal each day and you will not have to remember whether you took it.
Expect a short settling-in periodA little gas or bloating in the first week is normal and comes mostly from the prebiotic fibre. It usually eases within a fortnight as your gut adjusts.
Keep the rest of your routine steadyChanging your diet, your sleep and your supplements in the same week makes it impossible to tell what did what. Give this one thing a clear run.
Review it at eight weeksPick two or three specific things you want to change, such as afternoon focus or how easily words come, and compare against those rather than a vague overall impression.
Note the refund date when it arrivesThe guarantee runs 180 days from delivery. Put that date in your calendar the day the parcel lands and keep the packing slip with your order email.
Choose your package
The per-bottle price drops sharply with quantity, and the three and six-bottle packages ship
free within the US. The six-bottle package is the only one that includes the bonus guides.
Prices verified October 2026. Always confirm at
checkout before ordering.
What each package works out to per day at one tablet daily,
including shipping where it applies.
Package
Per bottle
Order total
Shipping
Days covered
Per day
2 bottles
$79
$158
$9.99
60
$2.80
3 bottles
$69
$207
Free
90
$2.30
6 bottles
$49
$294
Free
180
$1.63
Which package makes sense? If you have not taken Synaptigen before, the
two-bottle package is a 60-day supply, which lines up almost exactly with the eight weeks a
probiotic needs before it can fairly be judged. If you already know it suits you, the six-bottle
package brings the cost down to $1.63 a day and carries the three bonus guides.
Three free guides with the six-bottle package
Digital downloads, delivered with your order. They come with the six-bottle package only.
Deep Sleep BlueprintHow To Get The Perfect Sleep In Just One Week
Sharp Mind In 7 DaysA Simple Guide To Becoming Super Smart
10 Proven Ways to Learn Fasterand Boost Memory
The 180-day guarantee
180 days, counted from the day it arrives
The refund window runs from delivery rather than from the date of
purchase, so shipping time does not eat into it. That is a better term than most of this
market offers, and it means a two-bottle order gives you the full 60-day trial with four
months still in hand afterwards.
To claim it, send the bottles back — opened or empty makes no difference — with
the packing slip and a note giving your name and the email address you ordered with. Return
postage is yours to cover. Refund requests go by email to Synaptigen support with
Refund Request in the subject line; BuyGoods, the retailer of record,
handles order lookup if you have mislaid your order number.
Probiotics suit most healthy adults, and this formula carries no stimulants and nothing with a
significant drug-interaction profile. Three things are still worth knowing.
A short settling-in period is normal. Some gas or bloating in the first week
or two comes mostly from the prebiotic fibre and usually eases as your gut adapts. Taking the
tablet with food helps.
Check before doubling up. If you already take a probiotic, compare the
strains. Where they overlap you are paying twice for the same thing.
Live cultures warrant a conversation first if you are severely
immunocompromised, have a central venous catheter, or have recently had major abdominal surgery,
and as always if you are pregnant, nursing, under 18 or taking prescription medication.
Frequently asked questions
What is Synaptigen?
A once-daily probiotic tablet formulated around the gut-brain connection. Each bottle holds 30 tablets, a one-month supply, and the formula combines three probiotic strains with inulin as a prebiotic fibre, tricalcium phosphate, and strawberry and peppermint extracts. It is non-GMO and contains no stimulants.
How do I take it?
One tablet daily, with or just after a meal. Food buffers stomach acid, which gives live cultures a better chance of arriving where they are meant to work. Taking it at the same meal each day is the easiest way to stay consistent, and consistency matters more than timing with a probiotic.
How long before I notice anything?
Give it eight weeks. Probiotics are among the slowest-acting supplement categories, and most clinical work in this area runs four to twelve weeks before measuring anything. The two-bottle package is a 60-day supply, which covers that window almost exactly. Judging it after a few days will not tell you anything useful.
Does it contain stimulants?
No. There is no caffeine and nothing stimulant-like in the formula, so there is no jitter and no afternoon crash. It also means this is not a product you feel within an hour of the first tablet. It works gradually, which is the nature of anything acting through the gut.
Are there any side effects?
The usual one is a short digestive adjustment in the first week or two, which can mean a little gas or bloating. That comes mostly from the inulin rather than the bacteria, and it generally settles as your gut adapts. Taking the tablet with food helps.
Who should speak to a doctor first?
Anyone who is pregnant or nursing, under 18, or taking prescription medication. Because this contains live cultures, it also warrants a conversation first if you are severely immunocompromised, have a central venous catheter, or have recently had major abdominal surgery. A pharmacist will check an interaction for you at no cost.
Can I take it alongside another probiotic?
You can, but check the strains first. If your current product already contains paracasei, reuteri or B. lactis, you would be paying twice for the same thing rather than broadening what you are getting. Where the strains differ, the two are complementary.
Does the label list the exact amounts?
No. The formula is listed as proprietary, so the individual amounts and the colony-forming unit count are not published, and two of the three strains are given at species level rather than by strain code. BL-04 is the exception and is named in full. That is worth knowing if you like to compare labels in detail before buying.
Ready to try Synaptigen?
From $49 a bottle on the six-bottle package, with free US shipping, three bonus guides and
180 days to change your mind.
Deep Sleep BlueprintHow To Get The Perfect Sleep In Just One Week
Sharp Mind In 7 DaysA Simple Guide To Becoming Super Smart
10 Proven Ways to Learn Fasterand Boost Memory