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“Energy back like I was 25” Ryan K.✦“Hitting more sets, more weight” Marcus D.✦“Sleep improved without even trying” Alex P.✦“Bloodwork confirmed the jump” Devin R.✦“Haven't felt this good in years” Chris M.✦“Recovery is night and day” Tyler B.✦
“Energy back like I was 25” Ryan K.✦“Hitting more sets, more weight” Marcus D.✦“Sleep improved without even trying” Alex P.✦“Bloodwork confirmed the jump” Devin R.✦“Haven't felt this good in years” Chris M.✦“Recovery is night and day” Tyler B.✦
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Gorilla Mind Sigma supplement bottle, hero product shot
Gorilla Mind Sigma supplement facts panel
Gorilla Mind Sigma key product callouts, part A
Gorilla Mind Sigma key product callouts, part B
Gorilla Mind Sigma ingredient benefits breakdown

SIGMA

Testosterone Booster*

Are you training hard, eating right, managing stress, and sleeping enough, but still feel like something is missing? For some, healthy testosterone levels may be the missing piece. Sigma helps bridge the gap for serious individuals who want to support their body’s natural testosterone production without utilizing exogenous hormones.

Third Party Tested With Viewable Results*

Real Reviews Showing 150+ Testosterone Point Increases*

Stress management for a more testosterone-favorable environment*

Cancel Anytime

Free Shipping

No Commitment

Secure checkout

Third-party tested

30-day guarantee

Before You Check Out

Compare Your Options

Hormonal change is cumulative. Most men feel the difference between month one and month three — the longer window is where the formula does its real work.

30-Day Supply
$39.99
One Month · 1 Bottle

Enough to see how you respond. Most men are still in the priming phase when a single bottle runs out.

Start With 30 Days
Most Chosen
90-Day Supply
$119.98
Three Months · 3 Bottles

The full window. Hormonal change is cumulative — this covers priming, ignition and the optimized phase in one commitment.

Go The Full 90 Days
What To Expect

What Happens After You
Start Taking Sigma

Days 1–7
Priming
›Zinc, Magnesium and D3 begin filling the most common deficiencies
›KSM-66® starts working on cortisol load
›Sleep quality is often the first thing men notice
›No dramatic changes yet — the foundation is being laid
Days 8–30
Ignition
›Tongkat Ali and Fadogia support androgen biosynthesis*
›Boron helps free up testosterone bound to SHBG*
›Training feels sharper; recovery between sessions tightens
›Energy holds through the afternoon without the crash
Days 30–90
Optimized
›All seven actives working together on all four pathways
›Strength, drive and libido feel consistent, not spiky
›Body composition shifts for men training and eating well
›This becomes your new baseline, not a temporary spike
Individual results vary. Timelines reflect typical customer-reported experience, not clinical outcomes.

7 Ingredients In 1 Powerful Formula

Potently Dosed · Fully Disclosed
600mg
Tongkat Ali
std. 1% Eurycomanone (root)

HPLC-verified. Supports androgen biosynthesis, libido and athletic output.*

600mg
Fadogia Agrestis
10:1 Extract (root)

Works upstream on the signalling that drives natural testosterone production.*

500mg
KSM-66® Ashwagandha
std. 5% Withanolides

Patented and clinically studied for lowering cortisol, testosterone’s antagonist.*

3,000 IU
Vitamin D3
as Cholecalciferol

One of the most common male deficiencies, directly tied to T production.*

30mg
Zinc
Bisglycinate Chelate

Essential trace mineral in testosterone metabolism and immune function.*

40mg
Magnesium
Bisglycinate Chelate

Highly absorbable form — not cheap oxide. Supports sleep and recovery.*

10mg
Boron
as Boron Citrate

Helps modulate binding proteins to support free testosterone.*

Zero Proprietary Blends

Every dose above is printed on the label. Nothing hidden, nothing rounded down.

Doses shown per 4-capsule serving. Serving size 2 capsules; 60 servings per container.
The Sigma Difference

Sigma vs. TRT vs.
Generic Test Boosters

Sigma is built to support your own production — not replace it, and not hide underdosed extracts behind a blend.

 
Sigma
TRT
Generic Booster
Approach
Supports your own production
Synthetic replacement
Single mechanism
Natural Production
Supports
Shuts it down
Varies
Convenience
Capsules daily
Injections
Capsules daily
Bloodwork Required
Optional
Required
Optional
Fully Disclosed Doses
✓
N/A
✕
Reversible
✓
Lifelong commitment
✓
Third-Party Tested
✓
N/A
Rarely

Built For Men Who
Take This Seriously

Past 30 And Slipping
Past 30 And Slipping

Recovery takes longer and the same training returns less. Sigma targets the hormonal side of that gap, not the motivational one.

Training Hard Already
Training Hard Already

High volume plus real-life stress keeps cortisol elevated. KSM-66® and the mineral base help your hormones keep pace with the work.

Done With Blends
Done With Blends

If you’ve been burned by underdosed extracts hidden behind a proprietary blend, every dose in Sigma is printed on the label.

Real Customers

What Men Are Saying

4.8
★★★★★
1,284 verified reviews
★★★★★
Bloodwork Doesn’t Lie

Retested after 8 weeks and my total testosterone came back noticeably higher than my baseline panel. Energy and drive followed right behind it.

Ryan K.✓ Verified Buyer
★★★★★
Recovery And Drive Are Back

Sleep is deeper, gym recovery is faster, and libido is night and day. The fully transparent label is why I trusted it in the first place.

Marcus D.✓ Verified Buyer
★★★★★
No Proprietary Blend Games

Every dose is listed and dosed properly — Tongkat and Fadogia at real amounts, not fairy dust. Two months in and I won’t stop.

Alex P.✓ Verified Buyer
30-Day Money-Back Guarantee

Feel The Difference
Or Get Your Money Back

Run Sigma the way it’s meant to be run. If you don’t feel the difference, request a refund within 30 days of delivery and we’ll return the full cost of the product.

Shop Sigma

Frequently Asked Questions

What is Sigma?+

Sigma is a natural testosterone support formula for men 18+. It helps you maximize your own production through four pathways — androgen biosynthesis, binding protein modulation, essential mineral repletion, and cortisol reduction.*

Is this a steroid, prohormone, or TRT?+

No. Sigma contains no steroids, prohormones, or exogenous hormones. It works entirely within your body’s own endocrine system, so it doesn’t shut down your natural production the way replacement therapy does.

How long until I see results?+

Most men notice improvements in energy, mood, and libido within 2–4 weeks of consistent daily use. Hormonal change is cumulative — the full picture typically shows up around weeks 6–8.

How do I take it?+

Take 2 to 4 capsules spread throughout the day. Two is a solid baseline; increase to four as needed. Do not exceed 4 capsules in any 24-hour period.

Do I need to cycle Sigma?+

Yes. Run Sigma daily for 1 month, then take at least 1 week off before resuming. Cycling keeps your endocrine system responsive to the formula long-term.

What’s actually in the formula?+

Vitamin D3, Magnesium Bisglycinate Chelate, Zinc Bisglycinate, Fadogia Agrestis (10:1), Tongkat Ali standardized to 1% Eurycomanone, KSM-66® Ashwagandha standardized to 5% Withanolides, and Boron Citrate. Every dose is printed on the label.

Do I have to subscribe?+

No. You can buy once with no autoship. We recommend a subscription because results come from consistent daily use, and subscribers save 20% on every shipment with free shipping — but you can skip, pause, or cancel anytime.

What is your guarantee?+

If you’re not satisfied, request a refund within 30 days of delivery and we’ll refund the full cost of the product. Subsequent subscription shipments can be rescheduled or cancelled anytime from your account.

Your Order Includes

Sigma Testosterone Booster — 90-Day Supply $149.97$119.98
Fast 3–5 Day Shipping $7.99Free
30-Day Money-Back Guarantee Included
Skip, Pause Or Cancel Anytime Included
You Pay Today $119.98
GORILLA MIND
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Sigma contains no steroids, prohormones, or exogenous hormones.