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Description

N-Acetyl-L-Cysteine (NAC) is a powerful amino acid that helps your body make glutathione—your body's most important natural antioxidant.

Each capsule provides 900mg of high-quality NAC.

Think of glutathione as your body's cleanup crew: it neutralizes harmful free radicals, helps your liver remove toxins, protects your cells from damage, and supports your immune system.

NAC also helps break down and thin mucus in your lungs, making it easier to breathe.

Your body's glutathione levels naturally go down as you age, and they're also depleted by stress, poor diet, pollution, intense exercise, and illness.

NAC supplementation helps restore these levels, giving your body the support it needs to handle daily challenges.

It's especially helpful for supporting liver detoxification, protecting muscles after workouts, and maintaining healthy respiratory function.

How to use

Take one capsule daily with food, or as directed by your healthcare practitioner.

Each capsule provides 900mg of pharmaceutical-grade N-Acetyl-L-Cysteine.

For enhanced glutathione support or intensive detoxification protocols, some practitioners recommend higher doses under supervision.

Best taken consistently for optimal antioxidant and detoxification benefits.

Ingredients

N-Acetyl-L-Cysteine (900mg), Cellulose (capsule), Vegetable Stearate, Microcrystalline Cellulose, Silicon Dioxide, Ascorbyl Palmitate

NAC 900mg

Design for Health

Powerful 900mg NAC formula supporting glutathione production, liver detoxification, respiratory health, and antioxidant defense systems.

  • Glutathione Production
  • Supporting Liver Detoxification
  • Respiratory & Lung Health
  • Antioxidant Defense
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 Monthly Subscription
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Description

N-Acetyl-L-Cysteine (NAC) is a powerful amino acid that helps your body make glutathione—your body's most important natural antioxidant.

Each capsule provides 900mg of high-quality NAC.

Think of glutathione as your body's cleanup crew: it neutralizes harmful free radicals, helps your liver remove toxins, protects your cells from damage, and supports your immune system.

NAC also helps break down and thin mucus in your lungs, making it easier to breathe.

Your body's glutathione levels naturally go down as you age, and they're also depleted by stress, poor diet, pollution, intense exercise, and illness.

NAC supplementation helps restore these levels, giving your body the support it needs to handle daily challenges.

It's especially helpful for supporting liver detoxification, protecting muscles after workouts, and maintaining healthy respiratory function.

How to use

Take one capsule daily with food, or as directed by your healthcare practitioner.

Each capsule provides 900mg of pharmaceutical-grade N-Acetyl-L-Cysteine.

For enhanced glutathione support or intensive detoxification protocols, some practitioners recommend higher doses under supervision.

Best taken consistently for optimal antioxidant and detoxification benefits.

Ingredients

N-Acetyl-L-Cysteine (900mg), Cellulose (capsule), Vegetable Stearate, Microcrystalline Cellulose, Silicon Dioxide, Ascorbyl Palmitate

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Design for Health

Where Doctors Go for Real Results

Designs for Health operates in the shadows of mainstream supplements, exclusively serving healthcare practitioners with formulas the public can't access directly.

Their "Science-First" obsession means rejecting profitable trends for clinical truth. When your doctor recommends supplements, there's a good chance it's DFH behind the scenes.
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N-Acetyl-Cysteine

Frequently Asked Questions

What makes NAC different from other antioxidants?

NAC is unique because it's a precursor to glutathione, your body's most powerful internal antioxidant. While vitamin C and E neutralize free radicals directly, they can't replenish glutathione levels.
NAC provides the specific building block (cysteine) your cells need to make more glutathione, giving you longer-lasting and more comprehensive antioxidant protection.

This is especially important because glutathione works inside cells where most oxidative damage occurs, and it can regenerate other antioxidants like vitamins C and E.

How long does it take to see benefits from NAC supplementation?

Many people notice respiratory benefits (easier breathing, less mucus) within a few days to two weeks.
For detoxification and antioxidant support, benefits typically become noticeable within 2-4 weeks as glutathione levels build up.
Athletes often report improved recovery within 1-2 weeks.
For optimal results, take NAC consistently for at least 8-12 weeks, as cellular glutathione stores take time to replenish fully, especially if you're dealing with chronic stress, toxin exposure, or depleted levels.


Can I take NAC if I exercise regularly or do intense training?

Absolutely! NAC is excellent for athletes and active individuals. Intense exercise generates free radicals and depletes glutathione, leading to oxidative stress, muscle soreness, and delayed recovery.
NAC helps replenish glutathione stores, reduces exercise-induced oxidative damage, decreases muscle soreness, and supports faster recovery.
Many athletes take NAC daily for ongoing protection, with some taking an additional dose before or after particularly intense training sessions.
It's especially beneficial for endurance athletes and those doing high-intensity workouts.

Are there any interactions or precautions I should know about?

NAC is generally very safe and well-tolerated.
However, if you're taking nitroglycerin for heart conditions, consult your doctor first, as NAC can enhance its blood pressure-lowering effects.
People with cystinuria (a rare kidney stone disorder) should avoid NAC.
If you're taking activated charcoal for digestive issues, separate it from NAC by several hours.
NAC works synergistically with vitamin C, selenium, and milk thistle for enhanced antioxidant and detoxification support.
Always inform your healthcare provider about all supplements you're taking.