SKU: 86610407056

Cellucor | C4 Ultimate Shred

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Description

Cellucor | C4 Ultimate Shred350mg layered caffeine with solid CarnoSyn and real shred vibes Cellucor C4 Ultimate Shred is a high energy pre workout that amps up your workouts and helps with that fat burning vibe, especially if you're cutting. It's not about big pumps or a chill daily drink. It combines solid endurance support with layered caffeine, plus some focus boosters and ingredients that make you feel warmer and more driven during sessions. The star here is 3. 2g CarnoSyn

350mg layered caffeine with solid CarnoSyn® and real shred vibes

Cellucor C4 Ultimate Shred is a high-energy pre-workout that amps up your workouts and helps with that fat-burning vibe, especially if you're cutting. It's not about big pumps or a chill daily drink. It combines solid endurance support with layered caffeine, plus some focus boosters and ingredients that make you feel warmer and more driven during sessions.

The star here is 3.2g CarnoSyn® beta-alanine. That's a real dose that helps build up carnosine in your muscles—carnosine fights the acid buildup that makes your muscles burn during tough sets. Basically, it lets you push harder for longer in those 1-10 minute efforts. CarnoSyn® is the top branded version, and it's one of the best-backed parts of this formula.

Caffeine is a big deal too, with 350mg total. That's a strong amount that perks you up, cuts down on how tired you feel, and boosts your speed and motivation. What sets it apart is mixing caffeine anhydrous for quick hits with zümXR® extended- and delayed-release caffeine. This way, you get an initial boost without the hard crash later.

For better focus, there's 200mg Alpha-GPC and 100mcg Huperzine A. Alpha-GPC supplies choline to help make acetylcholine, which sharpens your attention and helps with that mind-muscle link. The catch: 200mg is

Key Highlights

  • 3.2g CarnoSyn® beta-alanine — a legit dose that counts, not just a tiny bit. It boosts carnosine in your muscles, which fights the acid from tough workouts and lets you keep going longer in those burning sets.
  • 350mg total caffeine — this is high-stim stuff, right up there with what works best for pre-workouts. It really ramps up your energy, alertness, and how hard you can push, especially if you're used to stimulants.
  • Two-phase caffeine setup with caffeine anhydrous and zümXR® extended- and delayed-release microspheres. You get a fast kick from the immediate stuff and steady energy from the timed-release, avoiding that big spike and drop.
  • 200mg Alpha-GPC plus 100mcg Huperzine A — a solid combo for focus. Alpha-GPC gives you choline for acetylcholine, and Huperzine A keeps it from breaking down too fast, making everything feel sharper and more on point.
  • 50mg Capsimax® — spot on for the dose that helps with heat and energy burn from capsaicinoids. It flips on receptors to crank up your metabolism during workouts without messing up your stomach like straight pepper might.
  • 180mg ginger extract with gingerols — more than just filler. It eases your gut, adds a warm feeling, and backs up the fat-burning side of things nicely.
  • 50mg Oligonol® — a special mix of lychee and green tea polyphenols that's showing promise for better blood flow, fighting fatigue, and antioxidant help. The dose is under the 100-200mg that's often tested, so it's more of a helper than the main event.
  • 5mg BioPerine® — the standard dose from the best-studied black pepper extract. It's there to help your body absorb everything better and make the formula work smoother.

Who Is This For?

  • Folks cutting who need workouts to stay intense on lower calories. The 350mg caffeine, Capsimax®, ginger, and rauwolfia bring that extra heat and push when dieting zaps your mojo.
  • Mid-level lifters doing high-rep muscle-building routines with quick rests. 3.2g CarnoSyn® beta-alanine shines here, helping buffer acid in those 8-20 rep grinds.
  • Circuit or bootcamp fans wanting energy that holds up, not a fast burn-out. Anhydrous plus zümXR® extended- and delayed-release caffeine carries you through longer sessions.
  • Seasoned users who handle 300mg+ caffeine and crave a punchy formula. It's for those who like big energy, urgency, and warmth, not a soft intro.
  • People recomping with weights and cardio. Capsimax®, caffeine, ginger, and Oligonol® make sessions more calorie-burning, while beta-alanine keeps efforts strong.
  • Lifters chasing better focus and connection with high stims. Alpha-GPC and Huperzine A add that mental edge over pure caffeine burners.

How to Use

Hit this 20-30 minutes pre-workout to sync the fast caffeine with zümXR®'s longer release. Not used to big stims? Start with half to test it out—350mg is no joke. Shake it up in 10-16 oz cold water; cold helps the flavor and mix. Eat light 60-90 minutes before for the best feel—empty stomach hits harder, full one slows it down. Don't stack with other stims like fat burners or coffee unless you're tracking totals. It goes great with plain creatine and an intra drink for hydration, since this doesn't have those. Daily scoops build beta-alanine benefits, but cycle off stims sometimes. Keep the tub sealed, cool, and dry to avoid clumping.

What to Expect

First 0-10 minutes: the drink settles, and you start feeling the stims build, especially on an empty-ish stomach. 10-20 minutes: anhydrous caffeine ramps up, you might warm up, and that 3.2g CarnoSyn® could bring the tingles. 20-40 minutes: this is prime time—focus dials in, drive kicks up, and workouts feel hot and aggressive. 40-90 minutes: zümXR® keeps the energy from dropping like in basic caffeine products. Days 1-7: you notice the energy, heat, and sharpness right away, since beta-alanine needs time. Weeks 2-4: with steady 3.2g daily, carnosine builds, and tough sets feel easier to handle before burning out. Overdo it without breaks, and caffeine might lose its edge.

Frequently Asked Questions

How much caffeine is in Cellucor C4 Ultimate Shred per serving?

This formula provides 350mg total caffeine per serving. That total comes from a combination of caffeine anhydrous and zümXR® extended- and delayed-release caffeine microspheres, so the energy profile is designed to hit fast and last longer than a single-source caffeine product.

Is the 3.2g beta-alanine dose actually clinical?

Yes. CarnoSyn® beta-alanine at 3.2g sits at the entry point of the clinically studied 3.2g to 6.4g range used to raise intramuscular carnosine. That matters because beta-alanine works through accumulation over time, not just how you feel the day you take it.

Will this make me feel tingly?

Possibly, and for many users likely. The 3.2g CarnoSyn® beta-alanine dose can create paresthesia, the harmless tingling or prickly sensation often felt in the face, ears, or hands after ingestion.

Is this more of a fat burner or more of a pre-workout?

It is best described as a thermogenic high-stim pre-workout. It has a real performance backbone with 3.2g CarnoSyn® and a layered caffeine system, but the Capsimax®, ginger, rauwolfia, and Oligonol® clearly push it toward a shred-oriented training experience.

Is Alpha-GPC fully dosed in this formula?

Not by the standards of most human performance research. Alpha-GPC is included at 200mg, while the most common research range is 300mg to 600mg, so it is fair to view it as supportive rather than fully clinical on its own.

Can I take this late in the day?

Most users should avoid that. With 350mg total caffeine and zümXR® extended- and delayed-release components, the stimulation tail can last longer than expected and may interfere with sleep if taken in the afternoon or evening.

Should I use this every day or only on training days?

If your goal is to maximize beta-alanine loading, daily intake makes physiological sense because muscle carnosine rises with consistent use. If your priority is simply stimulant impact, many users reserve it for training days and manage caffeine tolerance with occasional lower-stim days.

Can I stack this with a separate fat burner?

Usually not a smart place to start. This product already combines 350mg caffeine with thermogenic support and rauwolfia, so adding another stimulant-heavy fat burner can push total CNS load higher than many users tolerate well.

Does this formula use proprietary blends?

No proprietary blend is indicated, which is a plus. However, while total caffeine is disclosed at 350mg, the exact amount contributed by caffeine anhydrous versus each zümXR® caffeine form is not broken out individually.

What should I stack with C4 Ultimate Shred to improve performance further?

The most logical addition is standalone creatine monohydrate at 3 to 5g daily. This formula covers energy, thermogenesis, and beta-alanine-driven endurance support, but it does not include creatine for phosphocreatine replenishment and strength support.

Shipping Notes
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Lonni W
Chelsea, US
★★★★★ 3
below average value but decent quality on this 95.4% Polyester, 4.6% Spandex dress shirt
Special Size: Black Buttons, Size: Large, Color: Sky Blue, Special Size: Black Buttons, Size: Large, Color: Sky Blue
At $20 when I picked this up, it was overpriced for what it was. I'm held accountable to the value assigned to me at the time I select to review it, so I review the value based on what was assigned not on what it later becomes if they discount it. As I write this I can see it is in a value range it should have been for me, but I'm still reviewing it at the $20. That's overpriced on a 95.4% Polyester, 4.6% Spandex shirt (i.e., non-cotton) and so the value here is a 1/5 or 2/5, say 1.5/5 for it. In terms of quality, this is a poly dress shirt. Still, I'd call this a 4/5 for what it is. The standard is cotton, and in my experience, as someone in ties and collared shirts all day, I would note that I do prefer a 95 cotton/5 spandex blend, with the challenge that its not the most wrinkle free material. This blend, 95 poly/5 spandex, is a very wrinkle free and smooth feeling material. Poly has better durability than cotton despite feeling thinner, because it won't fray as much. That said, even though it's lightweight, poly will make you hotter because it doesn't breathe like cotton. It feels light, so you think it is going to be cooler, but in practice actually isn't really if it's a hot day. It can make you sweat more. That said, many people like poly blends for the ease of maintenance. I've given up dry cleaning, just too much, and I do like to avoid an iron, so I tested this out because of it. For me this fit well. I ordered a large (typically I prefer to wear a 16.5/34/35, and I'm 5'11, 185) and this fit well. It's not a slim fit (tapered bottom) for those who might complain about extra material. But it fit well. I put it through both the wash and dryer. It did not shrink (poly usually doesn't) to be out of size, but was fine, and of course came out without wrinkles. The collars have no stays, these poly shirts hardly ever do, but I have found they mostly remain flat, since the material doesn't tend to wrinkle, and thus my points stay in place just fine. At a 1.5 on value and a 4 on quality, this is a 2.75/5 average for me. Again, value plays a big part for me. So, full disclosure a better value would have raised my rating on this. But hopefully, based on what I covered above, you have enough to figure out if this shirt is worth it to you or not.
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Reviewed in the United States on March 2, 2026
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Getahun Wuneh
Charlottesville, US
★★★★★ 5
Thev quality and size
Special Size: Black Buttons, Size: Large, Color: Grey
It's good fit
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Reviewed in the United States on March 21, 2026
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Amazon Customer
Chelsea, US
★★★★★ 5
Nice dress shirt
Special Size: Black Buttons, Size: Large, Color: Grey
This shirt is a super soft and an awesome style, which I really love. The material is a soft cotton and that doesn’t irritate my skin. It is breathable, but also keeps you relatively warm. It’s very nice looking on and would be okay for everyday wear. It has been used many times going out with jeans or shorts out. I wash and dry it regularly in a machine and still looks just as new as the out of box condition. There is no pilling, fabric change, or shrinking. The style is flattering, cut well, and runs true to size. Other shirts owned feel similar to this one, which meets expectations and is a nice shirt for the price. I do wish it had a pocket though. Ultimately would purchase again.
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Reviewed in the United States on April 7, 2026
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A.T.
Lowell, US
★★★★★ 5
Sharp-looking business shirt at a great price
Special Size: Black Buttons, Size: X-Large, Color: Rhine Blue
This long sleeve dark blue shirt is a great choice for a business casual look. The "Rhine Blue" color really stands out — it’s very bold without being over the top, and it gives the shirt a sharp, polished appearance. The stitching is very well done, with clean lines and no loose threads, which adds to the overall quality. It fits nicely and maintains a crisp look throughout the day. The material is mostly polyester with some spandex, so it feels smooth, lightweight, and is actually breathable. It stays comfortable during long wear and doesn’t feel heavy or restrictive. Overall, it’s a sharp, well-made shirt that delivers both style and comfort at a great level. It was a good deal at the original price of about $20, but at the new price of about $15, it's an excellent deal. I may get another in a different color.
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Reviewed in the United States on March 29, 2026
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Valerie Jones
Port Orchard, US
★★★★★ 5
Very comfortable and looks great!
Size: X-Large, Color: Navy Blue, Size: X-Large, Color: Navy Blue
This shirt is surprisingly really nice for the price. Really nice even regardless of the price. It fits and looks great on my hubby. We liked it so much that I bought him another one in a different color. Will probably even buy more. The large ran a little small, so we got him an extra large and it was great.
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Reviewed in the United States on February 6, 2026

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