NutraBio | First Response | 60 Servings

NutraBio | First Response | 60 ServingsStrong immune boost with NAC, zinc, selenium, and D3 NutraBio First Response is a strong immune support powder that's simple and smart: it loads up on the key nutrients and antioxidants your body needs when immune stress, oxidation, travel, heavy lifting, crappy sleep, or seasonal bugs pile on. This isn't a jam packed 'superfood' thing. It's a focused, fully open label mix centered on vitamin C, vitamin D3, zinc, selenium, copper, and NAC at doses way

Strong immune boost with NAC, zinc, selenium, and D3

NutraBio First Response is a strong immune support powder that's simple and smart: it loads up on the key nutrients and antioxidants your body needs when immune stress, oxidation, travel, heavy lifting, crappy sleep, or seasonal bugs pile on. This isn't a jam-packed 'superfood' thing. It's a focused, fully open-label mix centered on vitamin C, vitamin D3, zinc, selenium, copper, and NAC at doses way higher than your average daily wellness stuff.

The big hitter is vitamin C at 3,000mg as ascorbic acid. That's a hefty amount compared to basic multis, making this perfect for those 'oh crap' moments rather than light daily use. Vitamin C backs up your white blood cells, recycles antioxidants, and strengthens skin and tissues. You won't get a buzz like from caffeine, but folks reach for it when they need fast coverage during high immune demand. Heads up: 3,000mg tops the usual adult upper limit of 2,000mg/day, so watch your stomach and use it smartly, not on top of other big vitamin C doses.

Vitamin D3 comes in at 50mcg, that's 2,000 IU, a solid daily hit for immune signaling. Your immune cells have receptors for it, and low levels are super common. This dose isn't overkill, but it's enough for steady use, especially if you're stuck inside a lot.

Zinc is 30mg as zinc bisglycinate chelate, a form that's easy on the gut and absorbs well. Zinc has good evidence for immune support, and research including a Cochra

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

Key Highlights

• 3,000mg vitamin C as ascorbic acid — this is a real powerhouse dose, not just a tiny bit for show. Grab it when you need big antioxidant and immune help, not just basic daily stuff.
• 600mg NAC — a solid dose of N-acetyl cysteine that helps your body make glutathione. That's key because glutathione is your body's main inside antioxidant during workouts, sickness, or tough environments.
• 30mg zinc as bisglycinate chelate — a beefy zinc amount in a quality chelated form. Zinc helps build and run your immune cells, and this beats the weak doses in most multis.
• 50mcg vitamin D3 — that's 2,000 IU of cholecalciferol for immune signals and daily needs. It's a smart dose if you're low on sun or need extra during rough seasons.
• 200mcg selenium as glycinate — a good hit for antioxidant enzymes. Selenium teams up with glutathione systems, making it a great match for NAC and vitamin C.
• 3mg copper as bisglycinate chelate — smart move here. High zinc can mess with copper, so adding this keeps your minerals in check instead of causing issues.
• Fully open label — no hidden blends, no mystery amounts. You can check every ingredient and dose yourself against what the studies say.
• Chelated minerals — zinc and copper are bisglycinate chelates, which are easier to handle and absorb than cheap forms. That's huge if you're using this regularly.

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

Who Is This For?

• Athletes in heavy training who know missed days start with crap recovery, bad sleep, and immune hits, not just soreness. The 3,000mg vitamin C, 600mg NAC, 30mg zinc, and 200mcg selenium give real backup when workouts stress you out.
• Travelers facing airports, hotels, wonky sleep, dry air, and new germs. This mix of high vitamin C, vitamin D3, zinc, selenium, and NAC is easy to use when your routine's messed up.
• Busy workers and parents who crash fast under stress and want more than a weak multi. First Response is for targeted immune hits, not spread-thin general stuff.
• Lifters who use performance supps and need dedicated immune and antioxidant help, not hoping their pre covers it. The mineral forms and copper show smart details savvy users want.
• Folks low on sun, indoors all day, needing daily vitamin D3 with immune minerals. 50mcg is solid without making it a vitamin D bomb.
• People who want NAC for glutathione and stress handling. 600mg is a good solo dose, no need for extras.

How to Use

Mix 1 scoop with 8-12 oz water and drink once a day during busy times or when you feel off. With 3,000mg ascorbic acid, it's often best with food if your gut's sensitive. If high vitamin C is new or your stomach acts up, try half a scoop first, then go full if it's good. Use a shaker for easy mixing, and cold water makes it taste better with ascorbic powders. Stacks well with protein, creatine, electrolytes, and gym supps since it's for immune, not overlapping. Don't stack blindly with extra zinc, selenium, vitamin D, or NAC unless you tally totals. No stims, so no cycling needed. Keep it cool and dry with the lid tight to avoid moisture.

What to Expect

Right after mixing, it's more about ease than a big feel since no stims. In the first hours, it's working inside: vitamin C, zinc, selenium, vitamin D3, and NAC get absorbed for immune and antioxidant action, not a noticeable buzz. Days 1-7, it's best during stress, travel, bad sleep, or early rundown feels when you want quick backup. By week 1, steady use keeps up nutrients many skip when life's nuts. Weeks 2-4, the win is consistent coverage from vitamin D3, zinc, selenium, and NAC through long hauls. Not a wow moment; it's about filling gaps before they bite.

Key Ingredients

• Vitamin C — 3000mg — High-potency antioxidant and frontline immune support
• Vitamin D3 — 50mcg — Supports immune signaling and daily vitamin D status
• Zinc — 30mg — Clinically relevant mineral support for immune defense
• Selenium — 200mcg — Powers selenoproteins and antioxidant enzyme defense
• Copper — 3mg — Balances high-dose zinc with intelligent mineral support
• N-Acetyl Cysteine — 600mg — Delivers glutathione precursor support where it matters

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

Frequently Asked Questions