Order by 3PM ET for same-day shipping — Shipped from Canada
Made in Canada

Superior synthol formula

Syntholix is the first Canadian synthol formula built on the finest USP ingredients. Developed by bodybuilders, for bodybuilders — painless, pharmaceutical-grade, and engineered for lasting size.

Rated 4.9/5 by athletes
  • Painless formula — no days of soreness
  • 6 pure USP ingredients, nothing else
  • Ships same day before 3PM ET, discreetly
$125.00 CAD100 mL bottle
1
Total $125.00 CADView cart
  • Buy 5+ bottles — save 8%
  • Buy 10+ bottles — save 20%
  • Discreet packaging · Same-day dispatch before 3PM ET
Secure checkout Discreet worldwide shipping Pharmaceutical-grade
Syntholix synthol
Same-day shipping before 3PM ET
USP pharmaceutical-grade ingredients
Shipped from Canada, worldwide

Premium quality

Made with high-grade USP ingredients in a pharmaceutical facility held to the highest standards.

Painless technology

An optimised formula that significantly reduces discomfort without compromising efficiency.

Lasting results

Developed by bodybuilders, for bodybuilders — unique ingredients engineered for durable gains.

What athletes say

Trusted since 2018

Third bottle in. Smoothest formula I've used — no lumps, no burn, and the arms held the size through my whole prep.
Marc D.Classic Physique competitor · Montréal
Ordered Tuesday afternoon, had it Thursday. Packaging was completely discreet and the protocol sheet made it easy.
Kyle R.Verified buyer · Texas
I tried two other brands before this. Syntholix is the only one that didn't leave me sore for days.
Andrei S.Verified buyer · Romania

The science behind Syntholix

Loosen the fascia. Unlock the growth.

Muscle size is not only a matter of training volume. It is also a matter of how much room your muscle is physically allowed to occupy.

01

Muscle fascia

There is an envelope wrapping tightly each individual muscle called fascia — a band of connective tissue beneath the skin that stabilises, encloses and separates muscles and organs. This envelope plays an important role in muscle growth: the tighter the fascia, the harder it is for the muscle to expand and grow.

02

Fascia flexibility

As the fascia's flexibility increases, it becomes easier for the muscle to grow. Some athletes gain muscle far faster than others — often explained by a genetic predisposition to greater fascia flexibility.

03

Lasting results

Synthol has been used for decades in bodybuilding with proven results. Syntholix's site enhancing oil can rapidly improve a muscle group before a competition, or break a stubborn growth plateau. With proper protocol, it improves fascia flexibility of targeted muscle groups — leading to quality, durable gains.

Fascia tension vs. growth potential

Tight fascia25%

Muscle is compressed — growth stalls.

With Syntholix protocol85%

Fascia gives — muscle fills the space.

Used before competition to bring up a lagging muscle group
Used to break through a specific growth plateau
Decades of proven use in bodybuilding and fitness
See the 30-day protocol

Why Syntholix

What you get in every bottle

  • Pure USP-grade ingredients
  • Painless-technology formula
  • Made in a pharmaceutical facility
  • Same-day dispatch from Canada
  • Discreet, unbranded packaging
  • Guided 30-day application protocol
2018

serving athletes since

Up to 20%

off when you stock up on bulk

Questions before you buy

Everything athletes ask us most. Still unsure? Contact us.

What exactly is Syntholix?

A premium site enhancing oil (SEO), also known as synthol or posing oil, formulated in Canada from pure USP ingredients: caprylic, capric, caproic and lauric acids with silica and benzyl alcohol.

Does it hurt?

Our painless technology significantly reduces the discomfort associated with older formulas while keeping the same efficiency.

How fast do you ship?

Orders placed before 3PM ET ship the same business day from Canada, in discreet packaging, worldwide.

Is the packaging discreet?

Yes. Every order ships in plain, unbranded packaging with no mention of the product on the outside.

How do I use it?

Follow our 30-day protocol for progressive, controlled application. Start conservatively and never exceed the recommended volumes.

All FAQs

Start your 30-day cycle

Order before 3PM ET and your bottle ships today, discreetly, from Canada.

SYNTHOLIX - Site enhancing oil

$125.00 CAD · In stock