SKU: 67747783724

NutraBio | First Response | 60 Servings

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Description

NutraBio | First Response | 60 ServingsHigh dose immune support with NAC and Albion chelated minerals. NutraBio First Response is a no nonsense immune support powder. It sticks to a few solid nutrients at real doses, shows every milligram, and leans on how they work in your body instead of hype. This isn't a throw everything in wellness mix. It's a focused stack for quick support with six ingredients that each pull their weight. Vitamin C is the star at 3,000mg as ascorbic acid. That's a

High-dose immune support with NAC and Albion® chelated minerals.

NutraBio First Response is a no-nonsense immune support powder. It sticks to a few solid nutrients at real doses, shows every milligram, and leans on how they work in your body instead of hype. This isn't a throw-everything-in wellness mix. It's a focused stack for quick support with six ingredients that each pull their weight.

Vitamin C is the star at 3,000mg as ascorbic acid. That's a big dose, way over daily basics, so you know it's built for heavy antioxidant and immune help, not just checking a box. It backs up your white blood cells, keeps skin barriers strong, and refreshes other antioxidants. You won't feel it like a buzz from caffeine, but it's a key player in the defense setup. At this level, some people might want it with food or split up if high ascorbic acid bugs their stomach.

Vitamin D3 comes in at 50mcg, which is 2,000 IU. That's a solid everyday amount for keeping your immune system in check. It's more about guiding your immune cells through receptors than instant feels—it helps manage your body's defense responses. This is a dose that counts, not just for show.

Zinc hits 30mg, spot on the high end of the 15-30mg range, as Albion® zinc bisglycinate chelate. Form matters here. Zinc powers over 300 enzymes and handles immune signals, antioxidant fights, and cell fixes. The bisglycinate chelate boosts how well it absorbs and sits easy on your gut by dodging blockers and using amino acids to get in.

NutraBio First Response by NutraBio contains 3000mg Vitamin C, a effective dose for muscle recovery and growth.

Key Highlights

  • 3,000mg Vitamin C — this isn't some weak add-on. It's a beefy dose for real antioxidant and immune backup, way better than those basic formulas with just a sprinkle for the label.
  • 2,000 IU Vitamin D3 — a smart daily hit for immune balance. It signals your immune cells through receptors, making it a must-have base in this mix for steady use.
  • 30mg Zinc as Albion® Bisglycinate Chelate — right at the top of the researched range. The chelated version absorbs better and goes down easier than cheap forms, perfect for a legit zinc supp.
  • 200mcg Selenium as Albion® Glycinate — a strong dose that boosts glutathione peroxidase and thyroid functions. Here, selenium's a key part of the antioxidant plan, not an afterthought.
  • 3mg Copper as Albion® Bisglycinate Chelate — added smartly, not just for show. High zinc can mess with copper over time, so this keeps things even while helping antioxidant enzymes and iron use.
  • 600mg NAC — a tried-and-true dose that feeds cysteine for glutathione building. It takes this beyond basic C and zinc, adding deeper antioxidant power from inside.
  • Fully disclosed label — every ingredient and dose right there. In a sea of secret blends and herb mixes, this transparency stands out big time.
  • Short formula, high impact — just six ingredients, all with clear roles. No skimpy mushroom mix, no weak elderberry, nothing here just for the hype.

NutraBio First Response by NutraBio contains 3000mg Vitamin C, a effective dose for muscle recovery and growth.

Who Is This For?

  • Athletes wrapping tough training who need recovery boosts when sleep, travel, and loads compete. High C, zinc, selenium, NAC make it stronger than a basic multi for immune defense.
  • Shift workers, healthcare folks, first responders with wild schedules and stress. It fits by hitting core nutrients and antioxidants, no stims or trendy herbs to mess with you.
  • Frequent flyers wanting a easy-carry daily powder with common immune picks. 2,000 IU D3, 30mg zinc, 600mg NAC beat weak gummies or packets.
  • Lifters and runners with training basics down but needing immune help in high-volume times. Fills the gap without clashing with pre or hydration stuff.
  • Label readers who hate prop blends and want good mineral forms. Albion® chelated zinc, selenium, copper upgrade from cheap oxides in basic supps.
  • Folks after a simple, smart mix over 20-ingredient blends. Each here has a real role, doses that matter.

How to Use

Mix 1 scoop with 8-16 oz cold water, once a day. New to big C or NAC doses? Start half scoop a few days to check gut tolerance, then go full. With a meal if your stomach's picky—3,000mg ascorbic and 600mg NAC can bother some empty. Morning or midday works for most, but evening's fine too, no stims. Stacks great with creatine, protein, electrolytes, fish oil—different job. Don't double minerals like zinc, selenium, copper, or D from other supps without tracking. No need to cycle like stims, but check overall nutrients now and then—this is potent. Keep sealed, cool, dry to avoid clumps.

What to Expect

First 0-10 minutes: mix and drink like any powder, no stim kick since it's free of that. 10-30 minutes: not much to feel beyond taste and settling; sensitive to high C or NAC? Food helps here. Day 1: it's about coverage from the 3,000mg C, 30mg zinc, 600mg NAC—no big feel, just support. Days 3-7: steady use builds in D3, selenium, zinc—better as a habit than spotty. Weeks 2-4: adds up, especially for D levels and consistent zinc, selenium, NAC. This one's about feeling covered, not wired.

Key Ingredients

  • Vitamin C — 3000mg — High-potency antioxidant support for intensive immune demands
  • Vitamin D3 — 50mcg (2,000 IU) — Daily immune signaling support at a meaningful dose
  • Zinc — 30mg — Clinical-range zinc for serious immune system support
  • Selenium — 200mcg — Top-end selenium dose for glutathione enzyme support
  • Copper — 3mg — Balances high zinc while supporting antioxidant enzymes
  • N-Acetyl Cysteine — 600mg — Classic NAC dose to support glutathione production

NutraBio First Response by NutraBio contains 3000mg Vitamin C, a effective dose for muscle recovery and growth.

Frequently Asked Questions

What is NutraBio First Response designed to do?

First Response is a fully disclosed immune-support and antioxidant formula built around six actives: 3,000mg vitamin C, 2,000 IU vitamin D3, 30mg zinc, 200mcg selenium, 3mg copper, and 600mg NAC. It is designed to cover core nutrient and glutathione-related pathways rather than relying on proprietary herbal blends.

How much vitamin C is in First Response, and is that a high dose?

Each scoop provides 3,000mg of vitamin C as ascorbic acid. Yes, that is an aggressive dose relative to standard daily formulas, which typically use far less, and it positions this product as more of an intensive support formula than a basic maintenance supplement.

Why does this formula include copper with zinc?

Because the zinc dose is substantial at 30mg. Higher zinc intake can reduce copper status over time, so the 3mg copper inclusion helps balance the mineral profile while also supporting antioxidant enzymes and iron metabolism.

What is special about the mineral forms in this product?

Zinc, selenium, and copper are provided as Albion® chelated forms. Chelation improves stability, absorption, and gastrointestinal tolerance versus many lower-cost inorganic mineral forms commonly used in generic immune products.

How much NAC is in First Response?

Each serving delivers 600mg N-Acetyl Cysteine. That is a classic standalone supplemental dose and is one of the main reasons this formula offers deeper antioxidant support than simple vitamin C + zinc products.

Should I take First Response every day or only when I feel run down?

It can be used either way, but the formula makes the most physiological sense with consistent daily use, especially for vitamin D3 and regular mineral intake. Sporadic use still delivers the ingredients, but daily use better supports steady nutritional coverage.

Can I take this with my pre-workout, creatine, or protein?

Yes. First Response is stim-free and does not overlap heavily with performance formulas, so it stacks cleanly with creatine, protein, electrolytes, and pre-workouts. The main thing to watch is duplicate zinc, selenium, copper, or vitamin D from other health products.

Is this a good choice if I have a sensitive stomach?

Possibly, but use care. The 3,000mg vitamin C dose and 600mg NAC can cause digestive discomfort in some users, so taking it with food or starting with a half scoop is the smartest approach.

Is First Response a daily multivitamin replacement?

Not exactly. It covers several important immune-related nutrients very aggressively, but it is not a broad-spectrum multivitamin with full coverage of all vitamins and minerals.

Does this formula contain any proprietary blends?

No. One of the product’s strongest advantages is that the label is fully disclosed, so you can see every ingredient and every dose.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 67747783724

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4.3 ★★★★★
Based on 15 reviews
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Verified Purchase
Amazon_Customer
Boise, US
★★★★★ 5
CAN be used for simple Home Theater but really shines when playing music.
Style: R-S202BL, Configuration: receiver only
First: YES, you can use this as an AV receiver *IF* you have a simple home theater setup and are willing and know how to run a digital to analog audio converter from your TV to the inputs of the receiver. BestBuy sells an inexpensive and intuitive unit. HOWEVER, if you have several devices associated with your home theater (i.e. more than 2 -- then this probably isn't a great option for you). I generally prefer Vintage Stereo equipment -- My ideal receiver was the Yamaha CR-2020. But sadly, those are hard to come by and have are more expensive and like a used car -- you don't really know what maintenance you have ahead of you. I had inherited a Sony AV receiver that pre-dated HDMI. It worked and I could even program my Logitech remotes with it. However, it really didn't bring the best sound out of my speakers -- a pair of original Large Advents. Plus, it seemed like it was starting to give up the proverbial ghost. My AV setup is pretty simple since I dumped Time Warner -- or whatever they are calling themselves these days. I have a TV, Roku Streaming stick and that's it! I don't have a living room that would accommodate 20 speakers and a sub without tripping over them (my cats and dog and kids shoes provide enough of an obstacle field). The downside -- this isn't really intended to be an AV receiver. No Optical Audio in... no HDMI ports... you have to make it work if you want to use it for your TV as well. I purchased an Insignia Digital to Analog Audio converter -- you plug in the HDMI cable from your TV into the input and use RCA cables as the output to plug into the receiver. This little gizmo was about 25 bucks so I was still saving quite a bit of money over "full-featured" AV receivers. The sound for the TV is fine -- You aren't going to be fooled into thinking you are in an IMax theater or anything. But that wasn't my primary concern. I really wanted my music to sound great. And playing music is where this receiver really shines! I *REALLY* like the Bluetooh connectivity so that I can play from my computer, cell phone without having to use a patch cable to plug into the receiver. It has a very simple interface -- mainly because there just isn't that much functionality. push a few buttons and you'll be able to figure it out without a manual. I know several reviewers have commented on the flimsy clips for the speaker wire but I have some fairly heavy gauge wire and it doesn't works just fine. I don't use banana plus -- just run the copper straight in. Once you get it set up, you shouldn't have a problem -- it isn't like you are constantly re-wiring your speakers. I was able to purchase this for less than 120 bucks and it drives my vintage Large Advents really well. It provides a beautiful full sound for a wide variety of musical genres. Maybe one of these days, I'll stumble across another great vintage receiver. But for the money and the convenience of a remote and bluetooth, this receiver can't be beat. [NECAR}
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Reviewed in the United States on January 30, 2018
C
Verified Purchase
Count Pitoffy
Phoenix, US
★★★★★ 5
No Nonsense
Style: R-S202BL, Configuration: receiver only
I love this unit! No buzzers and bells, just high quality, hi-fidelity audio. Very easy installation and easy to use remote. Display is not cluttered with unnecessary information. It's sleek appearance make it an awesome unit for any indoor application.
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Reviewed in the United States on April 17, 2026
B
Verified Purchase
Bryan G
Bozeman, US
★★★★★ 5
Does exactly what I wanted, sounds perfect for the price.
Style: R-S202BL, Configuration: receiver only
I'm kind of an audiophile, really picky. I got this while on sale for $150 and I am really surprised with how good it sounds, it doesn't compare to the Niko amp I was using in the barn, but it powers my KX12 speakers really well, shakes the walls of the barn. I'll be taking those speakers inside for the winter along with the Niko amp and be using the YAMAHA NS-6490 speakers I bought at the same time as this. I'll be reviewing those speakers soon, they also surprised me. The bluetooth connected easily. I had to use a 3.5mm Aux to 2 RCA Adapter Audio Cable to connect my laptop to it. Some stereos come with a 3.5mm input, this doesn't, but neither did my Niko Beta 30 preamp, so no big deal, the adapter was less than $8. The tuner is really good, I have this in my pole barn that is all metal, including the roof and 18 miles out of town yet it picks up several stations with the supplied antenna, my portable stereo doesn't pick up anything when in the barn. The specs say it plays 10 Hz – 100 kHz, that seams a little much, the best ears can hear is up to 20kHz, and nothing you connect to it will go higher than 30 kHz, so why would this play up to 100? I use an equalizer to shape the sound and it does play to my satisfaction for the price, both sound quality and volume. For the $150 I spent, this is a really good deal.
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Reviewed in the United States on November 18, 2023
S
Verified Purchase
srptopdog
Lexington, US
★★★★★ 4
Excellent, But I Returned It...
Style: R-S202BL, Configuration: receiver only
I have been a pro musician all of my life and have owned and still use a variety of high quality recording gear. It was time to simplify my setup for the benefit of others. Although my setup sounded great, it was too confusing for friends and family to use with my separate power and mixing console, etc. The solution was to buy a self contained stereo receiver that was easy for everyone to use. Being on a budget, and having owned a myriad of Yamaha instruments and audio gear over the years, I felt confident in buying this receiver without hearing it first. The bang for the buck is great, and this could easily be a five star rating. I will avoid commenting on specs, etc., as those can be easily compared at anyone's leisure. The Bluetooth feature is very nice, as I am often streaming songs my band is covering and learning from my phone or iPad and it sure is convenient to connect wirelessly, and the sound is great, btw. Even better than a wired connection. Build quality is excellent. It's a fine device, no question. Despite the many reasons for liking this receiver I returned it after several weeks of daily listening. Bottom line, in my opinion, I did not like the audio quality. Although it can produce more than enough volume to fill my 12' x 18' listening space, there was a lack of fullness and warmth to the sound. True, this receiver is certainly at entry level pricing, but my primary need was to obtain the best sounding 2-channel unit within my budget. I have ordered the Onkyo TX-8020, which I believe will be a better sounding receiver for my needs. Although the Onkyo lacks Bluetooth, it does offer a separate subwoofer output (which is something I might add down the road), and has a built in phono preamp input, eliminating the need to purchase a separate turntable preamp should I have kept the Yamaha, as I own LPs. A comment about wattage. The Yamaha claims 100w /channel, while the Onkyo, only 50w /channel. Power amp designs vary widely, as do power amp ratings and and measurements. For example, the guitar player in my classic rock band plays a 15 watt amp, and at a loud concert may get turned up to 3, with lots of headroom to spare. Google the subject if you're interested in learning more. I should mention that speakers vary widely in design and performance too, and it's possible the Yamaha will come alive and sound to my taste with other speakers. I believe many people will really enjoy the Yamaha BL202. It's a fine receiver. Bottom line, if YOU like it, that's all that matters. I will amend this review soon after I receive the Onkyo. UPDATE 6-28-16: I received the Onkyo TX-8020. I like the amplifier better. To my ears, the bass is tighter, more defined and warmer. Mids and highs seem smoother, and the soundstage in well defined and natural. The overall sound is "fuller." Sound is subjective, and in the end your ears decide what you like to hear. The Yamaha sounded great too. Although I don't have Bluetooth with the Onkto, I can stream YouTube and my internet radio stations from my phone or iPad to my Roku player, which is connected to the Onkyo, so I will have somewhat similar wireless capability. There is a wireless add-on accessory to connect an IPad , iPod or iPhone that I may consider.
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Reviewed in the United States on July 26, 2016
J
Verified Purchase
J.H.K.
Draper, US
★★★★★ 5
Great features and impressive quality for the price!
Style: R-S202BL, Configuration: receiver only
Got this for my classroom. Not an audiophile by any means and certainly didn't need the latest greatest features (along with accompanying higher cost). For what I paid, $150 on Amazon before sales tax, I'm very impressed with what it offers and can do. Installed it in my classroom today. Connected it to a pair of old Sony bookshelf speakers which I got around 10 years ago. Specifically got this receiver because the old Onkyo I previously used (still working even though it must be from 1980s or 1990s) was unable to handle audio input from my classroom desktop computer even though I had gotten an adapter cable that had a 3.5mm jack on one end and two RCA (red/white) plugs on the other end. Wanted to use the bookshelf speakers instead of the weak external speakers provided by school for whenever I would need audio during a lesson, video clips, etc. to be heard by students at the back of the classroom. After setting up this receiver and putting it through its paces, I am pleased with its overall performance. I connected my classroom's desktop computer to the receiver using that adapter cable previously mentioned and this receiver had no problems at all picking up the signal and transmitting it to my bookshelf speakers. Tried out the radio tuner and was pleasantly surprised by both how clear the sound quality is for many local stations (compared to the Onkyo I had previously been using) and for even decoding signals from distant stations (I'm using a spare cheap external FM radio antenna, not the wire antenna provided with this unit) which the previous Onkyo receiver (and even my car radio) can't pick up clearly if at all. The Bluetooth feature is nice. There's a cheaper version of this receiver without the Bluetooth feature but I decided that the extra $20 was worth it for providing additional possibilities. Had no problem pairing this receiver with my Nexus 6 smartphone. No problems streaming music from my smartphone to the receiver. So far, I've only encountered one problem. I thought about docking one star off for this problem but in the end decided not to do so because the overall functionality and performance of the receiver isn't significantly impaired by this issue. When I first powered up this receiver (after making all the necessary audio connections to speakers and computer), I thought I might have had a defective unit because I couldn't hear anything even though the volume was clearly set at 40 (out of a 0-99 scale). After some trial and error, what I discovered was that any setting below 45 is practically impossible to hear coming out of my speakers. Once I cranked up the volume to 50-55, sound was clearly discernible to anyone near the speakers. From 55-65, sound fills up my entire classroom nicely. From 65-75, it gets loud in my classroom and when I walked out into the hallway (and then continued walking down the hallway) I could hear the sound clearly from several classrooms away. I can only imagine how loud it might be (and how far the sound may travel) if I cranked up the volume beyond 75. So, for all intents and practical purposes, the sound on this unit works but I'm essentially navigating between 45 (quiet) and 80 (really loud) instead of the full range of 0-99. Like I said, functionality and performance doesn't seem to be impaired by this discrepancy, so I ultimately decided not to knock off a star. Not sure if this issue is particular to the specific unit I received or a recurring pattern in more units beyond mine. Not a deal-breaker and not worth going through the hassle of a merchandise exchange since it gets the job done. Looking forward to seeing how well this unit works out for this coming school year (and hopefully for many years beyond). If anything should arise to warrant editing this review, then I'll update as needed.
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Reviewed in the United States on August 6, 2016

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