SKU: 38120687975

Cellucor | C4 Shred

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Description

Cellucor | C4 Shred3. 2g CarnoSyn, 350mg caffeine, layered shred focused energy Cellucor C4 Ultimate Shred is a high stim pre workout with a fat burning twist, focusing on quick energy, lasting power through your session, and support during cuts. It's not about big pumps or simple daily use. The idea here is to mix a solid endurance booster, a smart caffeine setup, focus helpers for your brain, and branded fat burners with absorption boosters. This creates a pre workout

3.2g CarnoSyn®, 350mg caffeine, layered shred-focused energy

Cellucor C4 Ultimate Shred is a high-stim pre-workout with a fat-burning twist, focusing on quick energy, lasting power through your session, and support during cuts. It's not about big pumps or simple daily use. The idea here is to mix a solid endurance booster, a smart caffeine setup, focus helpers for your brain, and branded fat-burners with absorption boosters. This creates a pre-workout that hits hard at the start but keeps going longer than those with just one type of caffeine.

The standout dose is 3.2g CarnoSyn® beta-alanine—that's the standard amount proven to increase carnosine in your muscles over time. Beta-alanine is the key building block for carnosine, which fights off the acid buildup from tough, oxygen-limited efforts. In real terms, it helps you push through the burn in high-intensity sets, intervals, sled work, circuits, or rep-heavy lifting. It's one of the best-backed ingredients for boosting performance in 1-10 minute bursts, with tons of studies behind it.

You get 350mg of caffeine total per scoop, which is a solid high-stim level that's backed by research for most people. The cool part is how it's delivered: some from fast-acting anhydrous caffeine for quick kick-in, plus zümXR® extended-release and delayed-release beads to keep it steady. Caffeine blocks adenosine receptors to cut fatigue, boost alertness, speed up reactions, and ramp up your drive to train. This multi-stage setup avoids the sharp drop you get from plain anhydrous stuff.

Alpha-GPC at 200mg and huperzine A at 100mcg make up the focus team. Alpha-GPC is a bioavailable choline don

Key Highlights

  • 3.2g CarnoSyn® beta-alanine — this is the full clinical dose that builds up muscle carnosine over time. Carnosine fights the acid that piles up in tough, air-limited efforts, so it's killer for repeated high-intensity sets, circuits, and intervals, not just easy cardio.
  • 350mg total caffeine — a real performance-boosting amount in the proven 200-400mg zone for energy and sharpness. For folks used to it, this cuts how hard the workout feels, tightens focus, and amps urgency without needing extra stims.
  • Multi-phase caffeine from anhydrous plus zümXR® extended- and delayed-release beads. You get quick startup from anhydrous, then a steadier vibe through the workout instead of the spike and crash from single-source caffeine.
  • 200mg Alpha-GPC plus 100mcg huperzine A — a smart combo for focus and connecting your brain to your muscles. Alpha-GPC provides choline to make acetylcholine, while huperzine A keeps it from breaking down fast, making the energy feel targeted, not scattered.
  • 50mg Capsimax® — a branded capsaicinoid at the studied 50-100mg level. It triggers TRPV1 receptors to crank up heat production and fat breakdown, with tech to cut the stomach burn you'd get from straight cayenne.
  • 180mg ginger extract with gingerols — a nice touch in a high-stim fat-burner. Ginger eases digestion, fights inflammation, and adds to the warm, body-heat feel without just piling on more jitters.
  • 50mg Oligonol® — a branded mix of lychee and green tea polyphenols for antioxidant support, better blood flow, and fighting fatigue. The dose is under the 100-200mg from new studies, so it's more of a helper than the star.
  • 5mg BioPerine® — spot-on in the clinical range for better nutrient uptake. Black pepper extract boosts how well other ingredients get absorbed, making the whole formula hit harder.

Who Is This For?

  • Bodybuilders and physique folks in a cut who need a pre to keep training fierce on low calories. The 350mg caffeine setup maintains drive and power, while 3.2g CarnoSyn® helps with hard sets when fuel's low and tiredness hits early.
  • Seasoned lifters in rep-heavy phases with short rests, supersets, and conditioning ends. It's made for workouts where muscle burn limits you, and beta-alanine shines in that 1-10 minute intense zone.
  • Early morning gym goers wanting fast energy without the crash from plain anhydrous pres. Anhydrous plus zümXR® extended- and delayed-release beads give a smoother ride through the whole session.
  • Working pros hitting the gym after long days who need energy and brain focus to crush it. Alpha-GPC plus huperzine A makes it feel task-ready, not just wired without direction.
  • HIIT and conditioning fans after a fat-burning formula that still works as a pre. Capsimax®, ginger, caffeine, and rauwolfia amp heat, sweat, and pace, not just fake energy.
  • Intermediate to advanced users who know their stim limits and want one scoop instead of stacking pre and burner. It packs energy, endurance, focus, and shred support together.

How to Use

Try half a scoop first if you're new to this or your stim use is low. Full scoop packs 350mg caffeine plus rauwolfia—real high-stim stuff, even for pros. Take 20-30 minutes pre-gym; that lets anhydrous start while zümXR® backs it up. Shake in 10-16 oz cold water for best mix; more water can mellow the stim and heat kick. Empty stomach amps speed and strength, light meal cuts any gut hassle from stims or spice. Don't stack with other high-stim stuff or energy drinks—this handles it. Pairs great with plain creatine and intra hydration, since those aren't here. No need to cycle beta-alanine, but take caffeine breaks if the buzz weakens. Store sealed in a cool, dry spot—powder hates moisture and heat.

What to Expect

Minutes 0-10: beta-alanine not kicking yet, but you might feel it settling and early alertness if stomach's empty. Minutes 10-20: anhydrous caffeine ramps up, clears your head, and beta-alanine tingles often hit from the 3.2g CarnoSyn®. Minutes 20-40: prime time for focus, drive, and the warm burn from Capsimax®, ginger, and rauwolfia. Minutes 40-90: zümXR® caffeine keeps things steady, avoiding quick drops. Days 1-7: energy's instant, but beta-alanine's endurance builds slowly as carnosine loads. Weeks 2-4: biggest change is better handling of repeated efforts from carnosine, while stim feel depends on your caffeine habits.

Frequently Asked Questions

How much caffeine is in Cellucor C4 Ultimate Shred?

Each serving provides 350mg total caffeine. The formula uses caffeine anhydrous for faster onset plus zümXR® extended- and delayed-release caffeine microspheres to create a more sustained stimulation curve than a single-source caffeine pre-workout.

Is the beta-alanine in C4 Ultimate Shred clinically dosed?

Yes. It contains 3.2g CarnoSyn® beta-alanine, which is the standard clinical baseline used in research to increase muscle carnosine over time. That matters most for high-intensity efforts where acidity and muscular burn limit output.

Will this product make me feel tingly?

Possibly, and for many users the answer is yes. The 3.2g CarnoSyn® dose can cause paresthesia, the harmless tingling sensation commonly felt in the face, ears, or hands after beta-alanine use, especially if you are not used to full doses.

Is C4 Ultimate Shred more of a fat burner or a pre-workout?

It is a hybrid, but it leans harder into the shred side than most standard pre-workouts. You get real training support from 350mg caffeine and 3.2g CarnoSyn®, but Capsimax®, ginger, rauwolfia, and the overall stimulant profile clearly position it as a cutting-phase formula.

How strong is the focus component?

The focus stack is purposeful but not maximalist. Alpha-GPC at 200mg is below the 300-600mg range often used in athletic research, but pairing it with 100mcg huperzine A makes the cholinergic side more noticeable than the Alpha-GPC dose alone would suggest.

Can I take this with coffee or an energy drink?

That is generally not a smart starting point. With 350mg total caffeine already onboard plus rauwolfia, most users should count this as their primary stimulant source for the workout window and be cautious with additional caffeine from coffee, fat burners, or energy drinks.

Should I take C4 Ultimate Shred every day or only on training days?

Most people will use it on training days because of the stimulant load. However, the biggest cumulative performance benefit comes from the 3.2g CarnoSyn® beta-alanine, which works through ongoing carnosine loading, so daily consistency matters more for that ingredient than for the stimulant effect.

Is this a good beginner pre-workout?

No, not for most beginners. Between 350mg caffeine, layered release caffeine forms, thermogenic agents, and rauwolfia, this is better suited to experienced users who already know they tolerate high-stim formulas well.

What should I stack with C4 Ultimate Shred to complete the formula?

The best additions are standalone creatine monohydrate and a hydration or electrolyte product. Creatine complements beta-alanine by supporting phosphocreatine-based ATP regeneration, while electrolytes improve training quality and fluid balance without adding more stimulants.

How does this compare to a pump-focused pre-workout?

This product is not built around maximum vasodilation or skin-splitting pumps. Its identity is high-stim energy, endurance support, focus, and thermogenesis, so users primarily chasing huge nitric oxide-driven pumps may prefer a dedicated pump or performance formula instead.

Shipping Notes
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SKU: 38120687975

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4.1 ★★★★★
Based on 12 reviews
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Tommy
Cuba, US
★★★★★ 5
Works great (quick test)
Just got this and tested and works great I attached to my MacBook with Ethernet and had a solid connection I tested my steam deck by plugging in Ethernet then adding HDMI then adding power and everything worked as it was plugged in I tested my Nintendo switch even though it clearly states it's not supported and it did not work at all. Even the power pass through did nothing. This is not even remotely a problem since it was advertised as such but I figured it was with a try and worth noting
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Reviewed in the United States on May 31, 2026
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Verified Purchase
kunoh
Port Orchard, US
★★★★★ 4
Despite some caveats; this is a versatile hub
The Anker 555 8-in-1 USB-C Hub is a good buy if you’re looking for a hub from a reputable brand. I use it with an M1 Macbook Air, and it has been reliable so far. This hub has the following ports: 1 USB-C data port, 1 USB-C Power Delivery Port, 2 USB-A data ports, 1 HDMI port, an Ethernet port, and a microSD/SD card reader. Charging, PD (Power Delivery): To keep my Macbook charging, I connect a PD (Power Delivery) capable cable to the USB-C port meant for PD. (The other USB-C Port on this hub is meant only for data.) Once connected, the hub will eventually become warm to the touch, but this hasn’t caused any problems so far. Video Performance - no problems in 1440p I can connect my 1440p 144hz monitor to this hub’s HDMI port and my Macbook Air has no problem outputting a refresh speed of 144hz, as well the lower refresh rates of 120hz and 60hz. (I do not have a 4k monitor, so I could not test that.) USB-A Ports - works flawlessly I’ve tried keyboards, USB Drives, and even gaming Mice. All of these devices work as expected when connected to the USB-A Ports. Ethernet - Excellent speed I've connect this hub using an Ethernet cable to Gigabit speed Internet. The speed is just as fast as other computers on the network, and there is no slowdown at all, even with most of the ports on the hub being used. Gaming Keyboards with USB-C connectors - some issues. Some peripherals such as keyboards with USB-C connectors may not work on the USB-C ports on this hub. I tried using a Glorious GMMK Mechanical Keyboard and it did not work with this hub’s USB-C ports. (Of course you could try to simply use a USB-C to USB-A adaptor and then connect via the other USB ports on the hub instead.) Extension Cable - Use a Thunderbolt 4 cable Although this is totally optional, I like to use a small, 6-inch USB-C Extension cable to allow this hub to have more slack away from my laptop when connected. To allow this to work, I had to use a Thunderbolt 4 extension cable. I've tried other cables such as a Thunderbolt 3 extension cable. However, some of the attached devices on the hub were not recognized. Only the the Thunderbolt 4 extension cable allowed all my attached devices to be recognized. Other devices I have successfully connected an external SSD via the USB-C data port on this hub. I also regularly use an external DAC using the USB-A ports connecting to an IFI HIP DAC. Both of these devices work perfectly with this hub. Data transfer speed is rated at 10Gbs, though I haven't actually confirmed that. It works well enough for my purposes of transferring text documents and the occasional batch of vacation photos to my external SSD. Conclusion This hub from Anker is rated at 10Gbs which is plenty for me. But if you regularly transfer large amounts of data (like for video editing), I would instead recommend a powered docking station such as those from CalDigit. But for me, this portable hub does everything I need, and for much less money.
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Reviewed in the United States on January 28, 2023
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SamCat
Lowell, US
★★★★★ 5
Almost perfect, could use one more USB-C Gen 2 port and a metal case instead of plastic.
Never really had any problems with Anker gear, I've come to trust the brand name. This little hub is almost perfect for use with my 2019 MacBook Pro, but where Anker really dropped the ball is by not adding one more USB-C port. I mean, there's two, but if one is dedicated to power devices only that doesn't really leave much room for expansion by only giving you one extra, I mean they were thoughtful enough to give you two USB-A ports. I do like that the USB-C and two USB-A ports are version 3.2 Gen 2 rated for up to 10Gbps transfer speeds versus Gen 1 at 5Gbps. The plastic casing does get hot, not sure if aluminum metal would be any better, but it would feel nicer, plastic just feels cheap. Also, a dark case with dark letter printing doesn't work because you can't see the writing, should have used lighter letter coloring. Otherwise, solid performer. I'll keep it along with my other one because having two hubs with a laptop is convenient so I don't have to always haul a hub around from place to place. PROS: • 1 USB-C port version 3.2 Gen 2 rated up to 10Gbps. • 2 USB-A ports version 3.2 Gen 2 rated up to 10Gbps. • Also includes, HDMI, Ethernet, SD and micro SD card ports. CONS: • Plastic casing, gets hot. • Should have one more USB-C port. • Port description lettering is too dark, gets lost against dark case color, should have used white or silver lettering instead. • No audio port.
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Reviewed in the United States on May 7, 2024
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Mares by the Bay
Charlottesville, US
★★★★★ 5
It WORKS! I'm Back at Work. Thx to Apple for support and Amazon for fast delivery
I am thrilled to report that the Anker USB C Hub with Ethernet fixed a dire problem that nailed me when I switched from my maybe-20 year old dying wired Apple Extended Keyboard to the Macally keyboard comparable (with USB-C connection). I have a 2023 MacBook Pro 14", a lovely workhorse, with 3 USB-C/Thunderbolt ports, a MagSafe power port and an HDMI port (with, it turned out, limited ability to handle UHD displays, so useless for my desk setup). It turned out my old Dockteck hub with ethernet didn't have thunderbolt capable USB-C ports, so my new MacAlly keyboard connected to that hub stopped working. On top of that, as I swapped with my Logi webcam, it also required a trickle of power the Dockteck hub didn't provide. As soon as I figured out what the issue was, I read up on several multiport adapters with ethernet, and it seemed that either I would be stuck purchasing WAY more than I needed, adding another bulky (annoying!) device on my desk surface and costing me close to $200. This seemed crazy, so I called Apple Store support. The only Apple Store multiport adapter was useless to me (and also $80) because, of all weird things, it had only ONE USB-C/Thunderbolt compatible port among 8--most ports were legacy. (Ugly too, just saying folks don't HAVE to make devices ugly!) The Apple Store rep, in one of those brilliant customer rep incidents, understood quickly the challenge, said Apple Store didn't have anything that would work for me, but SHE KNEW SOMEONE (ta-da! better than AI!) who would know and could recommend. Three minutes later she said this Anker device would work. I had it in hand by 6pm same day. So this is not just a rave for a solution that WORKS, but also a thank you to the great support from Apple to get me back to work fast. And Amazon for getting the item to me fast too!
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Reviewed in the United States on April 20, 2026
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Chris
Battle Creek, US
★★★★★ 5
Great as long as you know its limitations; runs warm; monitor settings may need to be changed
I reluctantly gave up MagSafe and joined the USB-C future when my employer issued me a new 2019 16" MacBook Pro. Searching for a way to connect my various peripherals I settled on this hub as a reasonable way to connect a 4K display, pass power from the laptop charger (albeit not the full 96W; macOS reports 79W after hub losses—good enough most of the time), connect 1GigE, and provide a few spare USB ports and occasionally-used SD card slots. I've learned a few things: A port that looks like USB-C does not pass video unless it is a "Thunderbolt" port (look for the lightning bolt logo, apparently); connecting a USB-C-to-mini-DisplayPort adapter to the USB-C port on this hub did not allow my monitor to work. Lesson learned. The HDMI port did work, and did pass 4K@60Hz, but only after I adjusted my monitor settings. At first I was convinced either my HDMI cable or this hub were defective, because macOS would only allow me to select 4K@30Hz. I have an LG 4K display, and from reading forums, one must enable 60Hz in the on-screen display menu before the monitor will tell the computer it is capable of displaying 60Hz video. For my monitor, that meant changing "Ratio" in "Quick Settings" to "Original" (it defaulted to "Wide", with a separate configuration for each port), as well as turning on "HDMI ULTRA HD Deep Color" from "Picture" -> "Picture Adjust." After I changed those two settings, 60Hz was not available until I unplugged the HDMI cable from the hub and plugged it in again. After that I had buttery smooth 4K video at 60Hz. The hub works as advertised, at least for my configuration. The 1GigE port works well, and is equivalent to a direct USB-C to Ethernet adapter I tried. It does run warm to the touch as other reviewers have reported. That's not problematic, but I'd prefer it pass the missing 17W to the laptop rather than dissipate it as heat. Time will tell how well the hub holds up, but for now I'm happy. In summary: if you have a new Mac this hub will likely work for you, though you may need to adjust your monitor settings.
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Reviewed in the United States on September 1, 2020

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