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alpha-1 antitrypsin

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Also called: Alpha-1 Antitrypsin ELISA for Human Stool (ImmuChrom), Etanercept and Alpha-1 antitrypsin Dual Therapy, Alpha1-proteinase inhibitor (human)

By The Health Stacks Research TeamUpdated September 15, 2026

Alpha-1 antitrypsin is a protein made by the liver that floats in the blood. Its main job is to protect the lungs from damage. Some people are born with genes that stop their body from making enough of this protein. This condition is passed down from parents to children. If the body does not have enough of this protein, the lungs can get hurt more easily over time. This can lead to breathing problems and lung sickness. The liver can also get sick because it tries to make the protein but fails, causing the protein to get stuck inside the liver cells.

When a person has low levels of this protein, their lungs are weak. The most common problem it causes is a disease called COPD, which makes it hard to breathe. It can also cause the lungs to act like they have asthma, with wheezing and coughing. In some cases, the skin can get painful red bumps. The protein works like a shield. It stops an enzyme in the body from eating away at healthy lung tissue. Without the shield, the tissue breaks down faster, especially in people who smoke or breathe in bad air.

Doctors can check for this problem with a simple blood test. If a person has very low levels, they might get extra protein put into their blood through a vein. This is called augmentation therapy. It helps replace the missing shield. There is no complete cure for the gene problem, but treatments can help. People with this condition must not smoke to keep their lungs safe. It is important for family members to get tested too, because the gene runs in families.

ApprovedApproved by a regulator (e.g. FDA) for a specific medical use — the highest research-status tier. High confidence60–79 — backed by solid sources with good corroboration across multiple citations.

Benefits

What alpha-1 antitrypsin Helps With

The benefits people report — backed by research.

Cytoprotection / cellular defense (5)

Endogenous metal ion chelator 75/100Rated 75/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Essential metal ion homeostasis 75/100Rated 75/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Inhibitor of serine proteases 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →A1AT replacement therapy treats Alpha-1 Antitrypsin Deficiency by restoring protease inhibitor function to protect lung tissue from elastase-driven proteolytic destruction 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Corrects disease-causing mutation in AATD 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

Anti-inflammatory (4)

Inhibition of neutrophil elastase 95/100Rated 95/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Reduces risk of asthma exacerbations 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Anti-inflammatory 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →SERPINA1 Pi*S and Pi*Z variants and reduced AAT protein levels are associated with increased risk of asthma exacerbations 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

Tissue & wound healing (3)

Prevention of parenchymal destruction in lungs 95/100Rated 95/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Prevention or slowing of lung density loss and lung function worsening in Alpha-1 Antitrypsin Deficiency 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Augmentation therapy slows or stops lung damage in AAT deficiency 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

Immune modulation (3)

Treatment of Alpha-1 Antitrypsin Deficiency 72/100Rated 72/100Source typeEstablished referenceIndependent sources2Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 2 srcAAT deficiency and SERPINA1 Pi*S/Pi*Z variants are associated with increased risk of asthma exacerbations, suggesting AAT augmentation could be a potential therapeutic target 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Recombinant CHO-cell-derived A1AT can be purified to 99.9% purity with low host-cell protein contamination via integrated chromatography, offering a scalable alternative to plasma-derived A1AT 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

Renal & hepatic (2)

Liver health 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Investigational base-editing therapy BEAM-302 has shown it can correct the disease-causing SERPINA1 mutation in patients with alpha-1 antitrypsin deficiency in early clinical trials 65/100Rated 65/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

More reported benefits (12)

Potential reduction of lung density loss and lung function worsening in AATD 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Treats Alpha-1-Antitrypsin Deficiency 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Potential reduction of lung density loss in AATD 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Augmentation therapy for emphysema 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Treatment of Alpha-1 Antitrypsin Deficiency via augmentation therapy 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →AAT augmentation therapy addresses emphysema/lung disease in AAT deficiency 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Protection of lower respiratory tract against proteolytic destruction 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Inhaled AAT safely boosts AAT levels directly in the lungs 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Base editing can correct the disease-causing Z mutation in alpha-1 antitrypsin deficiency in clinical trials 65/100Rated 65/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Indicated as alpha-1 antitrypsin therapy for specific COPD patient phenotypes 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Base editing corrects disease-causing mutation in AAT deficiency patients 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Inhibition of serine proteases 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

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How People Use It

1 reported routine — each line links to the source it came from.

From published sources

Routines as reported in peer-reviewed papers, clinical guidance, or vetted media — each linked to the source it came from.

SubQ

  • once a week 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ source

mg vs mcg: one milligram (mg) equals 1,000 micrograms (mcg) — multiply by 1,000 going from mg to mcg, divide by 1,000 going from mcg to mg. Mixing the two up is a thousand-fold dosing error: 1 mg taken instead of 1 mcg is a 1,000× overdose; 1 mcg instead of 1 mg is a 1,000× underdose. Always double-check the unit label and the decimal place.

Safety

Known Side Effects

Adverse effects reported in the research and by community use.

  • Anti-AAT antibodiesMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ synapse.patsnap.com
  • Anti-PEG antibodiesMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ synapse.patsnap.com
  • Adverse eventsMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ synapse.patsnap.com
  • Anti-AAT and anti-PEG antibody generationMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ synapse.patsnap.com
  • Immunogenicity (anti-AAT and anti-PEG antibody formation)Mild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ synapse.patsnap.com
  • WheezingModerate 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
  • Jaundice (Yellowish skin or eyes)Moderate 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
  • Coughing up bloodSevere 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
  • Panniculitis (painful lumps or hardening of skin)Moderate 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com

Reported in research and community sources — not exhaustive. Discontinue use and consult a healthcare professional if side effects occur.

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