What's the difference between nac-acetyl cysteine and l-cysteine?

N-acetyl-l-cysteine (NAC or NALC) and L-cysteine are two forms of the amino acid cysteine. While they share some similarities, they also have some notable differences. NAC is a modified form of cysteine with an acetyl group attached to it, making it more stable and better absorbed by the body. It is often used as a dietary supplement and has been shown to have antioxidant properties and support liver function, among other potential health benefits. On the other hand, L-cysteine is the unmodified form of cysteine and is a non-essential amino acid, meaning the body can produce it on its own. It is found in many foods, including poultry, eggs, dairy, and whole grains. L-cysteine is also commonly used as a food additive and is often used as a dough conditioner in baked goods. While both NAC and L-cysteine can provide the body with cysteine, NAC is considered a more stable and bioavailable form of the amino acid. Therefore, it's always best to consult a healthcare professional before taking dietary supplements, including NAC or L-cysteine.

Where is this product sourced?

All NUTRAHARMONY products are manufactured in the USA. NAC raw material is sourced from a US-based manufacturer and of course, meets all industry quality control criteria.

What antioxidant abilities does NAC have?

NAC is a precursor of the antioxidant glutathione, which is involved in detoxifying reactive oxygen species and other harmful substances in the body. NAC itself also has direct antioxidant properties through its ability to scavenge free radicals and reduce oxidative stress. Also, NAC's antioxidant abilities include: protecting cells from oxidative damage, supporting respiratory health, improving immune function, and improving cardiovascular health. Overall, NAC's antioxidant properties make it a versatile therapeutic agent with many interactions.

Where is this product manufactured?

All NUTRAHARMONY products are manufactured at US-based facilities. These manufacturers have all certifications and government licenses.

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🛡️ Elevate your inner defense—because your cells deserve the best!

IMMUNE COGNITIVE BOOST - Selenium plus B6 & B12 vitamins synergize to support immunity and brain health.
CLEAN CONSCIOUS FORMULA - Non-GMO, gluten-free, soy-free, and vegan—crafted for mindful wellness.
MADE IN THE USA WITH PRECISION - Advanced manufacturing and third-party testing ensure premium quality and safety.
POWER PACKED ANTIOXIDANT DEFENSE - 1200 mg of NAC fuels your body's natural detox and cellular protection.
TWO MONTH SUPPLY FOR DAILY VITALITY - 120 capsules deliver consistent antioxidant support to keep you ahead.

This NAC supplement delivers 1200 mg of N-acetyl cysteine per serving, enhanced with selenium, vitamin B6, and B12 to provide powerful antioxidant support, immune function, and cognitive health benefits. Made in the USA, non-GMO, gluten-free, and vegan, it offers a clean, high-quality formula with third-party testing for safety and efficacy. Each bottle contains 120 capsules, a two-month supply designed for daily cellular protection and wellness.

Reseñas

J**A

I feel fantastic

I’ve tried many supplements over the years, but this one truly stands out above the rest. From the very first week, I noticed a real difference — more energy during the day, better focus, and an overall sense of well-being that I hadn’t experienced before. The quality is unmatched: clean ingredients, no harsh aftertaste, and it’s gentle on my stomach.What I love most is the consistency. Every dose feels like it’s doing exactly what it promises. I’ve also done my research, and the transparency behind the sourcing and formulation gives me complete confidence in what I’m putting into my body.If you’re on the fence, don’t hesitate — this supplement delivers results you can feel. It’s become a staple in my daily routine, and I can honestly say I feel healthier, stronger, and more balanced than ever.

11.09.2025

G**N

Good quality

Good quality, and made in US

16.09.2025

M**D

Great NAC

Purchase for my husband, he says they do him good. This is the second bottle I have purchased

31.07.2025

C**.

Repeat customer

Repeat customer. Definitely recommend so far

2.09.2025

P**

Stop your ruminating

I utilize NAC daily to help minimize ruminating over trauma. Absolutely underrated and undiscovered tool to help minimize the difficulties of putting unwanted thoughts in the back of the head out of your head.Also very beneficial for increasing the immune system. Absolutely worth the money, size is standard, It does have sometimes a very distinct smell but.. who's really spending a whole lot of time smelling something that is probably in your hand for a total of less than a second.Easy to swallow with no aftertaste. This is my go-to brand.

23.02.2025

B**N

Love the energy

These tablets have really helped my energy. I would buy again.

6.08.2025

J**H

NAC

Good quality product

7.09.2025

J**S

Sleep and increased focus

Arrived in timely manner. Just received them so not sure how useful they will be. Lots of vitamins and minerals. B vit too.

12.01.2025

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