Excellent 4.8 | 2962 reviews

Kiro Nutrition

Arrives by
Arrives by
✨ Early Summer Sale ✨Save % + free shipping on your first order
β˜…β˜…β˜…β˜…β˜… 4.8 stars | 95K+ reviews | 1M+ members

6 Reasons Customers Love This

Add your hero body copy here.

100M+ Gummies Sold Save 52% + Free Shipping
Try ItRisk-Free For 30 Days
01

Benefit Headline 1

Add your benefit copy here. You can bold, italicize, underline, or add links.

02

Benefit Headline 2

Add your benefit copy here.

03

Benefit Headline 3

Add your benefit copy here.

04

Benefit Headline 4

Add your benefit copy here.

05

Benefit Headline 5

Add your benefit copy here.

06

Benefit Headline 6

Add your benefit copy here.

REDUCES BLOATING
16 DIGESTIVE ENZYMES
3 PROBIOTIC STRAINS
REDUCES BLOATING
16 DIGESTIVE ENZYMES
3 PROBIOTIC STRAINS
REDUCES BLOATING
16 DIGESTIVE ENZYMES
3 PROBIOTIC STRAINS
REDUCES BLOATING
16 DIGESTIVE ENZYMES
3 PROBIOTIC STRAINS

Muscle Growth Support

Strength That Sticks

Three Proven Compounds

Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair
Kiro Reflux Repair

Rated 4.8

(6,241+ Customers)

Kiro Muscle Protocol – Clinically Dosed

Β£23.00 Β£38.00 SAVE 39%
  • Build Muscle Like You Used To
  • Get Your Strength Back
  • Recover Faster After 40
  • Bigger Pumps Every Session
  • WADA-Backed Formula
  • 100% Natural Ingredients

Pre-order your Kiro Muscle Protocol to secure the next available batch. Next Batch Ships:

June 26th 70% SOLD
July 10th FORMULATING

Each batch is encapsulated to order at the studied dose β€” never pulled from old stock, never underdosed, never compromised. That level of precision takes time. Reserve your batch now so you are not left waiting on the next one.
Mastercard
American Express
Apple Pay
Google Pay
Shop Pay
Discover
Visa
30 Day Free Returns
FREE Shipping Included
A limited offer for serious men.
In recognition of growing demand for clinically dosed natural anabolics, we're making Kiro Muscle Protocol easier to access for a limited time.
Guarantee Badge

Less than 1% of customers claim our Money Back Guarantee

"Ecdysterone supplementation produced significantly greater gains in muscle mass compared to placebo in resistance-trained men over 10 weeks. The compound activates estrogen receptor beta without androgenic effects."

Isenmann et al., Archives of Toxicology, 2019
Kiro βœ…
Others ❌
Dosed to Match the Human Study
Epicatechin at 100mg β€” the dose used in Gutierrez-Salmean 2014. Competitors use 400–1000mg with no human evidence at those doses.*
WADA-Monitored Compound Included
Ecdysterone has been on WADA's monitoring list since 2020 β€” the anabolic effect was real enough to investigate. No competitor cites the Isenmann 2019 study by name.*
Two Separate Anabolic Pathways
Epicatechin works via follistatin upregulation. Ecdysterone works via ERΞ² activation. Most products pick one or neither. Both are included here at studied doses.*
Piperine at the Bioavailability Dose
40mg piperine per day β€” double the Shoba 1998 study dose. The leading competitor uses 5mg β€” 4x below the studied threshold for CYP3A4 inhibition.*
Ingredient
Benefit
(-)-Epicatechin 100mg
Raises follistatin by supporting myostatin regulation. Dosed to match Gutierrez-Salmean 2014 β€” the only human trial to show a statistically significant effect.*
Beta-Ecdysterone 400mg
Activates estrogen receptor beta in skeletal muscle to stimulate protein synthesis. WADA-funded RCT (Isenmann 2019) showed +2kg lean mass vs. placebo in 10 weeks.*
Piperine 40mg
Inhibits CYP3A4 to extend the active serum life of co-administered compounds. Dosed at 2x the Shoba 1998 study threshold to account for compound-specific variation.*
Split-Dose Protocol
1 capsule AM + 1 capsule PM with food. Epicatechin has a ~2.5hr half-life. Once-daily dosing did not demonstrate efficacy in clinical trial protocols. Split dosing is the protocol.*

Customer Testimonials

My training partner asked if I was on something.

Four years of training. Macros tracked every week. Nothing was moving. I read the Isenmann study before I ordered β€” the doses matched exactly. Six weeks in, my training partner asked if I had started taking something. I haven't changed my program. I haven't changed my diet. The only variable was this protocol.

J
James T., 41, California Verified customer

Recovery was where I felt it first.

I'm 44. The gap between my effort and my result had been growing for two years. Considered TRT. Considered SARMs. Neither sat right. Week two on this protocol the recovery shifted first β€” less soreness, faster turnaround. By week four the strength numbers followed. This is the first natural option I've tried where I could actually look up the evidence myself.

D
David R., 44, Texas Verified customer

I've been training five years and finally look like it.

I do everything right. High protein. Progressive overload. Eight hours sleep. Still didn't look like I trained. Googled myostatin and spent three hours reading. Found Kiro. Ordered. Eight weeks later my shoulders sit differently. My chest fills out shirts it didn't fill before. I'm not a hardgainer. I had a biology problem.

M
Marcus B., 33, New York Verified customer

The only supplement I've bought where I could verify the dose.

I read studies. I look up everything before I buy. Every other natural anabolic uses 400mg or more of epicatechin. I looked up Gutierrez-Salmean 2014. The study used 100mg. Kiro uses 100mg. That's it. That's the entire reason I ordered. Six weeks later I understand why the data said what it said.

C
Chris A., 38, Colorado Verified customer

Why ChooseKiro Nutrition?

See why serious athletes have made the switch to our Muscle Protocol.

Why ChooseKiro Nutrition?

See why serious athletes have made the switch to our Muscle Protocol.

Kiro
LEGIT
Others
SKIP THESE
Epicatechin dosed to match the human study (100mg)
WADA-monitored ecdysterone included
Piperine at the bioavailability dose (40mg)
No hormonal disruption β€” ERΞ² pathway only
Third-party tested for purity and potency
30 Day Money-Back Guarantee

Real Stories, Real Results

Honest experiences with Kiro Muscle Protocol

Image with text

WHY PEOPLE ARE MAKING THE SWITCH?

  • Compound that WADA Has Monitored Since 2020
  • Dosed to Match the Human Trials β€” Not the Marketing
  • Two Separate Anabolic Pathways in One Protocol
  • No Hormonal Disruption β€” ERΞ² Mechanism Only
  • Piperine at the Bioavailability Threshold
  • 30-Day Money-Back Guarantee

Frequently Asked Questions

Find answers to common questions about the formula, the protocol, and the evidence behind it.

Does this actually work? +

The Isenmann 2019 study β€” funded by WADA, published in Archives of Toxicology β€” showed the EC2 group taking ecdysterone gained significantly more lean mass (+2.03kg) than the placebo group over 10 weeks of resistance training. Separately, the Gutierrez-Salmean 2014 study showed a 49.2% increase in follistatin and a 16.6% reduction in myostatin at approximately 100mg epicatechin per day. Both compounds are dosed in this product to match those studies.

Why 100mg epicatechin and not 400mg? +

Because 400mg has never been tested in a published human trial for muscle or myostatin outcomes. The only human study that showed a statistically significant effect used approximately 100mg per day. Every competitor product that uses 400–1000mg is selling a dose with no human evidence behind it. We use 100mg because that is the dose the study used.

How long before I see results? +

The WADA-funded study ran for 10 weeks. That is the evidence-based timeline. Most people notice improved recovery in weeks two to three, and visible changes in strength and composition around weeks six to eight. The protocol requires consistent split-dosing β€” 1 cap AM + 1 cap PM. Epicatechin has a 2.5hr half-life, which is why once-daily dosing did not demonstrate efficacy in trial protocols.

Will this affect my testosterone? +

No. Beta-ecdysterone activates estrogen receptor beta β€” not androgen receptors. It does not suppress endogenous testosterone. The Isenmann 2019 trial confirmed no significant change in hormone profiles across either ecdysterone group. This is the key distinction between this compound and anabolic steroids, which bind to androgen receptors and suppress testosterone production.

Can I take this if I'm on medication? +

Speak to your doctor before adding any supplement to a medication protocol. Piperine inhibits CYP3A4, which affects the metabolism of certain drugs. If you are on prescription medication, this is particularly relevant and your physician should be informed before you start.

Is this suitable for women? +

Yes. Myostatin affects muscle growth regardless of sex. Ecdysterone activates ERΞ², which is expressed in skeletal muscle in both men and women. The formula was designed for anyone doing resistance training who wants the correct biological input β€” not a male-specific product.

When should I take it? +

One capsule in the morning with food and one capsule in the evening with food. This split-dose protocol is why the formula uses 56 capsules for a 28-day supply. Epicatechin's plasma half-life is approximately 2.5 hours. Once-daily dosing does not maintain sufficient serum levels across the day. The protocol matters.

Is there a money-back guarantee? +

Yes. 30 days. Run the protocol. If you don't notice a difference in your training output or recovery, reply to your order email and we'll refund you in full. No forms. No process designed to make you give up.