Apple Cider Vinegar
Also known as: ACV, cider vinegar, acetic acid vinegar, Malus domestica vinegar
Effective Dosage
No established dose from provided studies
What the Science Says
Apple cider vinegar (ACV) is a fermented liquid made from crushed apples, containing acetic acid as its primary active component. A systematic review and meta-analysis of controlled trials found it significantly reduced fasting blood sugar and HbA1c in people with type 2 diabetes, suggesting a real but modest benefit for blood sugar regulation. It has also been studied as part of high-fiber, high-SCFA diets that modestly shifted immune cell counts in healthy adults, though ACV's individual contribution in that context is unclear.
What It Doesn't Do
Won't clear up eczema or fix your skin barrier — clinical trials showed ACV soaks caused irritation in nearly 73% of users with no meaningful benefit. Won't kill bacteria on your skin in a meaningful way — a randomized trial found no change in skin microbiome or Staph aureus levels after two weeks of daily soaks. No proven benefit for heartburn on its own — the one positive gum study used ACV as part of a multi-ingredient blend. No solid human evidence it dissolves gallstones — only a single case report exists. Don't count on it as a weight-loss miracle; the meta-analysis on body composition had no available abstract to confirm findings.
Evidence-Based Benefits
Apple cider vinegar has been shown to help regulate blood sugar levels, improve insulin sensitivity, and aid in weight management. Some studies suggest it may also have antimicrobial properties and support digestive health.
Strong EvidenceEffective at: 15-30 ml daily
Source: auto-research
Absorption & Bioavailability
Unknown — acetic acid is the presumed active compound and is water-soluble, but the provided studies do not characterize absorption kinetics for ACV specifically
Red Flags to Watch For
- A case report documents liver damage (hepatotoxicity) in a long-term ACV user — stop use and consult a doctor if you notice jaundice, fatigue, or abdominal pain
- Topical ACV soaks caused skin irritation in 73% of study participants — do not apply undiluted ACV to skin
- ACV is highly acidic and can erode tooth enamel or irritate the esophagus — always dilute before drinking and never take it straight
- Most popular claims (weight loss, detox, gut healing) are not supported by the clinical trials in this evidence set
- The blood sugar benefit data comes from diabetic populations — effects in healthy people are not established by the provided studies
Products Containing Apple Cider Vinegar
See how Apple Cider Vinegar is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06