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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Exchange/Return Notes
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Miguel Denyer
Chelsea, US
★★★★★ 1
Don't waste your money - these people will not help you
On March 9th 2024, I purchased a MCombo Lift Chair costing $785. On the same day, through the same Amazon account (my PERSONAL account since I also have a business account), I purchased an Asurion Complete Protect policy at the cost of $16.99 per month plus taxes. About one month ago, a problem arose with the chair that required me to make a claim using the "Complete Protect" policy that I had purchased for that very item. The claim was initiated on January 1st, 2025 - On January 3rd, I received an email asking me for photographs showing the damage for which I was making a claim. I sent those photographs via email to the address provided on January 6th. On January 27th, having not received ANY response from Asurion, I contacted them via phone and was told that my purchase had been made with a business account, that it was being used for business purposes, and was therefore not covered. I assured the Asurion Representative that it was most certainly not a business use, and that the chair that I was claiming for had been purchased because I had extensive shoulder surgery done that made it impossible to get in and out of bed. After speaking (unsuccessfully) with the Asurion Rep, I then contacted Amazon Customer Service. I spoke with an Amazon Customer Service Representative on the phone who confirmed that I had in fact used my personal account to purchase the chair and the Asurion Complete Protect policy. That representative went on to send a message to Asurion on my behalf confirming that the purchase was for personal use and not business use. Asurion responded, asking me to call them with the order number for the Asurion purchase. The number I gave was the exact same order number on my order history, however, the Asurion Rep could not find it. I was finally able to discover that the order number in Asurion's system was entirely different and isn't even in the same format as an Amazon order number. Upon the Asurion representative finding my plan, she informed me that the chair was listed as being purchased for business use (despite Amazon confirming that it was NOT) but that I should give them "a couple of business days" to resolve the issue. Five business days later, still no response and so I called them again (Yesterday - February 1st 2025)... Lo and behold, I got the same crap yet again... the purchase was listed as business use and was therefore being denied, but she promised to remove the business use commentary and put the claim through again. Today, February 2nd, I called Amazon yet again to escalate and had to call THREE times because the first two calls resulted in me finally being connected to an Asurion representative (two different reps) and each time, the Asurion representative hung up the phone as soon as my name was mentioned. It has become clear to me that the Asurion "Complete Protect" policy is a SCAM - they will NOT take care of your issue, regardless of how long you've been paying. I have been paying every month since March 9th last year - so they've received over $170 from me thus far, with zero other claims, and if I am able to cancel right now, I will only receive $16.99 back. All I want, is the chair that I purchased the policy for coverage of, to be repaired or replaced. Asurion are NOT helping, and are actively avoiding contact. At this point, I am considering legal action against Asurion for fraud - perhaps even a Class Action. I'll wait and see if my issue gets resolved within the next 10 days or so.
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Reviewed in the United States on February 2, 2025
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CamRam
Fort Morgan, US
★★★★★ 5
Asurion is AWESOME!
Ok, so let me start with the fact that you should NOT waste your time calling Amazon's customer service if you think you have a claim under Asurion's monthly protection plan. CALL ASURION! I wasted almost an hour with Amazon representatives that have absolutely no training in how the Asurion plan works, or even any idea if my item was covered. In fact, they told me the mechanized chair I purchased under the plan wasn't covered! Finally, my call got escalated to a manager who was just as clueless about my coverage, but had the best idea ever... call Asurion! The smartest thing I did that morning was hang up with Amazon, and reach out to Asurion as I should have done in the first place. Dealing with Asurion's customer service, after my Amazon call, was like being elevated to VIP status! 😄 Asurion's rep nicely took all my info, including the chair's purchase date and order number. Then they asked that I upload a couple of pictures of the product, along with a written description of the malfunction I had mentioned over the phone. This is where it gets really good. They told me they'd review the claim to determine if they'd send a repair specialist or reimburse me the cost of the item. In less than 48 hours, they determined that a payout was in order, and sent me an email that included an Amazon gift card for the total cost of the item minus the taxes I had paid, which I loaded directly into my Amazon wallet. Apparently, Asurion does not include the purchase taxes in their coverage. But, I can live with that. All in all, Asurion's claims division get a double thumbs up 👍🏽👍🏽, and the company gets big ups from me for not only standing behind their protection plan, but doing so expeditiously! Special note: If you buy a lot of stuff from Amazon, and have Asurion's monthly protection plan, scroll the item listing before pulling the trigger on your purchase... you need to see the green streamer that indicates your product is protected by the plan. If you don't see that, check to see if there are alternative products that might be covered. There are very few electronic or high ticket items that aren't covered, but looking for that green banner in the item description that says it's covered is key to foregoing any future headaches.
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Reviewed in the United States on April 26, 2026
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Shance L McGuffey
Birmingham, US
★★★★★ 5
If they can't fix it they will replace it.
This protection plan that i pay monthly for paid for itself ten fold. My 3D printer just quit working and after the manufacturer warrenty had ran out at that. I submitted my claim they emailed me a shipping label in which I shipped out my printer that same day. Two days later they received my printer determined it couldc not be fixed and sent me a Amazon gift card for the full price of my printer. Today I will be receiving my new 3d printer thanks to Complete Protect. I highly recommend anyone and everyone to purchase this policy. This warrenty is like having a home warrenty like Homeshield but for your electronics and probably other stuff that i just have not read to see what else. This insurance will save me so much money over the corse of this year and every year after that. Thank you Complete Protect.
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Reviewed in the United States on May 22, 2026
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Michelle
New York, US
★★★★★ 5
Chromebook coverage.
EXCELLENT COVERAGE, hassle free, just had to return product for evaluation & decision. The only complaint I have is there was NO communication on the status of my returning the Chromebook for repair or replacement. I had to keep calling. I did get the full value of purchase on an Amazon gift card so I could buy another one for grandson’s school. Thank You SOOO MUCH ASURION, eternally grateful for your assistance! Will always purchase your coverage. MiMi
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Reviewed in the United States on June 5, 2026
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Toveth Noyse
Lexington, US
★★★★★ 5
Received giftcard money to replace my plan-protected malfunctioning motherboard
I've been subscribing to the Asurion protection plan for a while. Recently, an Asus Prime PC motherboard I had bought a few months ago on Amazon stopped working well. I ended up considering filing a claim with Asurion to see if they would either fix/replace it or issue the purchase price money, so I could buy the failed electronics replacement component again for my custom-built PC. I went to the protection plan's website and started the claim filing process but couldn't find the category my failed component would be under in order to select it from the drop-down list. I ended up messaging the live customer service. The chat messaging was somewhat slow, the agent told me they were experiencing some communication delays throughout their systems. Ultimately, the agent was very kind and understanding, and completed the claim filing process for me on her side by asking me to provide the necessary info such as the item's product name, date of purchase, price before taxes, etc. I received a printable UPS shipping label in the email, printed it, and returned the item in the mail. Approximately 2 days later, I received an Amazon giftcard code in the email with the dollar amount equal to the item's price before the sales tax. Then I redeemed the giftcard code on the Amazon page and proceeded to apply the giftcard money to my next purchase of a replacement Asus prime motherboard, and it all worked out successfully. Therefore, I had no issues with the protection plan service and recommend it to others.
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Reviewed in the United States on May 24, 2026

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