NutraBio Growth Peptides testosterone support supplement, front of container

Roll over image to zoom in Click on image to zoom

NutraBio Growth Peptides — 2.4g PeptiStrong + 2g DL-185 Dileucine

Name: NutraBio Growth Peptides — 2.4g PeptiStrong + 2g DL-185 Dileucine
Brand: NutraBio
SKU: NBG204892802
Price: 79.99 USD
Availability: InStock

No reviews

NutraBio Growth Peptides2,400mg PeptiStrong and 2,000mg DL-185 Dileucine, plus 50mg AstraGin. Non-hormonal, stimulant-free, vegan, 28 servings.Both headline ingredients are at their full researched doses, which is the reason to take this product seriously.Why a dipeptide beats free leucine — the genuinely clever partThis is the most interesting piece of science in the formula, and it explains why DL-185 is not simply expensive leucine.Leucine is the amino acid that triggers muscle protein synthesis, by activating the mTOR pathway. That much is well established, and it is why leucine content is the number that matters in a protein powder.DL-185 is dileucine — two leucine molecules bonded together (L-leucyl-L-leucine monohydrate). And that structure changes how it is absorbed.Free amino acids and small peptides use different transport systems in the intestine. Di- and tripeptides are absorbed via PepT1, a high-capacity transporter that is distinct from the transporters handling free amino acids — and it is not saturated by the same competition.The practical consequence: a dipeptide can produce a sharper, higher leucine spike than the same weight of free leucine, because it bypasses the bottleneck. And since mTOR activation responds to how quickly leucine rises rather than simply how much arrives, that peak matters.That is a real mechanism rather than a marketing story, and it is the same transporter logic that makes hydrolysed protein absorb faster than intact protein.PeptiStrong — what it is, and an honest readPeptiStrong is a fava bean protein hydrolysate, and its origin is unusual: the specific peptide combination was identified through AI screening of plant protein fragments for muscle-protective properties.The 2,400mg here is the full dose used in the research on it, which is worth crediting — plenty of products include a fraction of a branded ingredient's studied amount.The honest caveats: The research base is young. This is a recent ingredient, and the studies behind it are largely funded by the ingredient's manufacturer. That is normal in this industry and it is also a reason for measured expectations Claims about myostatin inhibition appear frequently in marketing for this ingredient. Myostatin limits muscle growth, so inhibiting it sounds compelling — but the human evidence for meaningful myostatin modulation from a supplement is thin, and pharmaceutical attempts at it have a difficult historyOur position: the dosing is honest and the mechanism is plausible. Treat it as a well-formulated product using current ingredients rather than a settled one.⚠ Seven capsules per servingWorth knowing before you buy, because it surprises people.A serving is seven capsules. That is not padding — 4.4g of active ingredient genuinely will not fit into fewer, and the alternative would be a powder.But it does mean two things: swallowing seven capsules daily is a commitment, and a 196-capsule bottle is 28 servings rather than the 60 or 90 people expect from a capsule product. Factor that into the cost per day before buying.⚠ This does nothing if your protein intake is inadequateWe would rather say this than let anyone waste money.Both ingredients work by amplifying the signal to build muscle. Neither supplies the material.Muscle protein synthesis needs a trigger and a supply of amino acids. DL-185 and PeptiStrong sharpen the trigger. If you are not eating enough protein — roughly 1.6 to 2.2g per kg of bodyweight — you are shouting a louder instruction at a builder with no bricks.Get protein right first. This is a product for people whose training and nutrition are already in order and who want to work at the margins — which is exactly how NutraBio position it.And one more honest point: if you already consume a good deal of leucine through whey protein, the marginal value of more leucine signalling diminishes. mTOR activation behaves more like a switch than a dial — once triggered, triggering it harder has limits.Specs (7 capsules) PeptiStrong2,400mg (fava bean protein hydrolysate) DL-185 Dileucine2,000mg (L-leucyl-L-leucine monohydrate) AstraGin50mg Calories15 Servings28 (196 capsules) FormatVegan, stimulant-free, non-hormonal LabelFully disclosed, no proprietary blends TestingThird-party tested, no banned substancesNon-hormonal matters here. Unlike prohormones or SARMs, this does not affect your endocrine system — so there is no cycling, no post-cycle therapy, no suppression, and no bloodwork requirement.How to take it Seven capsules after training on training days. Seven capsules at any time on rest days. Every day, including rest days. Muscle protein synthesis does not observe your training schedule. Alongside adequate protein, which is doing the structural work. No cycling needed — it is non-hormonal and safe for continuous use. Stacks with anything, including stimulant pre-workouts.Who this is for Experienced lifters whose training and protein intake are already dialled in Hard gainers struggling to add size despite doing the fundamentals Anyone in a heavy training block where breakdown is elevated Older lifters, where the muscle protein synthesis response to protein diminishes with age — a genuine phenomenon called anabolic resistance Anyone wanting a non-hormonal option with no cycling or bloodwork requirement Vegans, since both key ingredients are plant-derivedWho this is not forAnyone not already eating enough protein. This amplifies a signal; protein supplies the material. Fix that first — it is cheaper and matters more.Beginners. If you are in your first year of training, progressive overload and food will produce far more than this will.Anyone who dislikes swallowing capsules. Seven per serving is a genuine consideration.Anyone on a tight budget — creatine and protein deliver far more per pound spent, with decades more evidence.Anyone expecting a hormonal effect. This is deliberately non-hormonal.Not for anyone under 18, pregnant or nursing.Stack it with: whey isolate and creatine — the two with the deepest evidence behind them, and the foundation this is built on top of.Frequently asked questionsWhat is dileucine?Two leucine molecules bonded together. Dipeptides are absorbed via the PepT1 transporter, which is separate from and higher-capacity than the free amino acid transporters — producing a sharper leucine spike than the same weight of free leucine.What is PeptiStrong?A fava bean protein hydrolysate, identified through AI screening of plant protein fragments. 2,400mg here is the full researched dose.Is it hormonal?No. It is non-hormonal and stimulant-free, so there is no cycling, no post-cycle therapy and no suppression.Why seven capsules?4.4g of active ingredient will not fit into fewer. It is a genuine commitment, and it makes a 196-capsule bottle 28 servings.Will it work if my protein intake is low?No. Both ingredients amplify the signal to build muscle; protein supplies the material. Fix protein first.Do I need to cycle it?No. It is non-hormonal and safe for continuous daily use.Is the evidence strong?The dosing is honest and the mechanisms are plausible, but these are recent ingredients with research largely funded by their manufacturers. Measured expectations are appropriate.Can I take it with a pre-workout?Yes. It is stimulant-free and stacks with anything. Read more

Authorized Dealer NutraBio

Price:

$ 79.99

Quantity:

Every Day Low Pricing Available In Store

Authorized Retailer

Fast Shipping

Real Support If You Need It

PRODUCT LABEL

NutraBio Growth Peptides

2,400mg PeptiStrong and 2,000mg DL-185 Dileucine, plus 50mg AstraGin. Non-hormonal, stimulant-free, vegan, 28 servings.

Both headline ingredients are at their full researched doses, which is the reason to take this product seriously.

Why a dipeptide beats free leucine — the genuinely clever part

This is the most interesting piece of science in the formula, and it explains why DL-185 is not simply expensive leucine.

Leucine is the amino acid that triggers muscle protein synthesis, by activating the mTOR pathway. That much is well established, and it is why leucine content is the number that matters in a protein powder.

DL-185 is dileucine — two leucine molecules bonded together (L-leucyl-L-leucine monohydrate). And that structure changes how it is absorbed.

Free amino acids and small peptides use different transport systems in the intestine. Di- and tripeptides are absorbed via PepT1, a high-capacity transporter that is distinct from the transporters handling free amino acids — and it is not saturated by the same competition.

The practical consequence: a dipeptide can produce a sharper, higher leucine spike than the same weight of free leucine, because it bypasses the bottleneck. And since mTOR activation responds to how quickly leucine rises rather than simply how much arrives, that peak matters.

That is a real mechanism rather than a marketing story, and it is the same transporter logic that makes hydrolysed protein absorb faster than intact protein.

PeptiStrong — what it is, and an honest read

PeptiStrong is a fava bean protein hydrolysate, and its origin is unusual: the specific peptide combination was identified through AI screening of plant protein fragments for muscle-protective properties.

The 2,400mg here is the full dose used in the research on it, which is worth crediting — plenty of products include a fraction of a branded ingredient's studied amount.

The honest caveats:

The research base is young. This is a recent ingredient, and the studies behind it are largely funded by the ingredient's manufacturer. That is normal in this industry and it is also a reason for measured expectations
Claims about myostatin inhibition appear frequently in marketing for this ingredient. Myostatin limits muscle growth, so inhibiting it sounds compelling — but the human evidence for meaningful myostatin modulation from a supplement is thin, and pharmaceutical attempts at it have a difficult history

Our position: the dosing is honest and the mechanism is plausible. Treat it as a well-formulated product using current ingredients rather than a settled one.

⚠ Seven capsules per serving

Worth knowing before you buy, because it surprises people.

A serving is seven capsules. That is not padding — 4.4g of active ingredient genuinely will not fit into fewer, and the alternative would be a powder.

But it does mean two things: swallowing seven capsules daily is a commitment, and a 196-capsule bottle is 28 servings rather than the 60 or 90 people expect from a capsule product. Factor that into the cost per day before buying.

⚠ This does nothing if your protein intake is inadequate

We would rather say this than let anyone waste money.

Both ingredients work by amplifying the signal to build muscle. Neither supplies the material.

Muscle protein synthesis needs a trigger and a supply of amino acids. DL-185 and PeptiStrong sharpen the trigger. If you are not eating enough protein — roughly 1.6 to 2.2g per kg of bodyweight — you are shouting a louder instruction at a builder with no bricks.

Get protein right first. This is a product for people whose training and nutrition are already in order and who want to work at the margins — which is exactly how NutraBio position it.

And one more honest point: if you already consume a good deal of leucine through whey protein, the marginal value of more leucine signalling diminishes. mTOR activation behaves more like a switch than a dial — once triggered, triggering it harder has limits.

Specs (7 capsules)

PeptiStrong	2,400mg (fava bean protein hydrolysate)
DL-185 Dileucine	2,000mg (L-leucyl-L-leucine monohydrate)
AstraGin	50mg
Calories	15
Servings	28 (196 capsules)
Format	Vegan, stimulant-free, non-hormonal
Label	Fully disclosed, no proprietary blends
Testing	Third-party tested, no banned substances

Non-hormonal matters here. Unlike prohormones or SARMs, this does not affect your endocrine system — so there is no cycling, no post-cycle therapy, no suppression, and no bloodwork requirement.

How to take it

Seven capsules after training on training days.
Seven capsules at any time on rest days.
Every day, including rest days. Muscle protein synthesis does not observe your training schedule.
Alongside adequate protein, which is doing the structural work.
No cycling needed — it is non-hormonal and safe for continuous use.
Stacks with anything, including stimulant pre-workouts.

Who this is for

Experienced lifters whose training and protein intake are already dialled in
Hard gainers struggling to add size despite doing the fundamentals
Anyone in a heavy training block where breakdown is elevated
Older lifters, where the muscle protein synthesis response to protein diminishes with age — a genuine phenomenon called anabolic resistance
Anyone wanting a non-hormonal option with no cycling or bloodwork requirement
Vegans, since both key ingredients are plant-derived

Who this is not for

Anyone not already eating enough protein. This amplifies a signal; protein supplies the material. Fix that first — it is cheaper and matters more.

Beginners. If you are in your first year of training, progressive overload and food will produce far more than this will.

Anyone who dislikes swallowing capsules. Seven per serving is a genuine consideration.

Anyone on a tight budget — creatine and protein deliver far more per pound spent, with decades more evidence.

Anyone expecting a hormonal effect. This is deliberately non-hormonal.

Not for anyone under 18, pregnant or nursing.

Stack it with: whey isolate and creatine — the two with the deepest evidence behind them, and the foundation this is built on top of.

Frequently asked questions

What is dileucine?
Two leucine molecules bonded together. Dipeptides are absorbed via the PepT1 transporter, which is separate from and higher-capacity than the free amino acid transporters — producing a sharper leucine spike than the same weight of free leucine.

What is PeptiStrong?
A fava bean protein hydrolysate, identified through AI screening of plant protein fragments. 2,400mg here is the full researched dose.

Is it hormonal?
No. It is non-hormonal and stimulant-free, so there is no cycling, no post-cycle therapy and no suppression.

Why seven capsules?
4.4g of active ingredient will not fit into fewer. It is a genuine commitment, and it makes a 196-capsule bottle 28 servings.

Will it work if my protein intake is low?
No. Both ingredients amplify the signal to build muscle; protein supplies the material. Fix protein first.

Do I need to cycle it?
No. It is non-hormonal and safe for continuous daily use.

Is the evidence strong?
The dosing is honest and the mechanisms are plausible, but these are recent ingredients with research largely funded by their manufacturers. Measured expectations are appropriate.

Can I take it with a pre-workout?
Yes. It is stimulant-free and stacks with anything.