Syringic Acid for Health & Longevity - Quick Reference Sheet

Syringic Acid for Health & Longevity

Created on 08/13/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 5 – Audit

A plant compound in wine, dates, olives, honey, whole grains, and dark berries, also sold purified. Laboratory and animal work shows it strengthens the body's protective enzymes, damps inflammation, and lowers blood pressure, blood sugar, and stored fat in rodents. Almost nothing has been measured in people who swallow it; formal safety testing covers two weeks in rodents. (Full Review)

Protocol

Dose range in use
50–500 mg daily
No established human protocol; rodent doses scale to roughly 280–1100 mg for a 70 kg adult
Single versus split dosing
Twice or thrice daily
The short half-life makes splitting the more defensible pattern; no study has compared schedules
Dosing with dietary fat
With a fat-containing meal
Poor water solubility is the main absorption barrier; every formulation that improved rodent bioavailability used a lipid vehicle
Time to effect
Skin lesions, topical
12 weeks
The topical skin studies ran to twelve weeks
Metabolic markers
6–16 weeks
Rodent metabolic changes emerged over 6–16 weeks of daily dosing
Assessment window
4 months
No shorter-term human marker has been validated, so a four-month window is the realistic minimum

Benefits

Contraindications
  • Active chemotherapy or radiotherapy, and for 30 days afterwards
  • Pregnancy and lactation
  • Children and adolescents under 18
  • Hepatic impairment (Child-Pugh Class B or C)
  • Chronic kidney disease stage 4 or worse (below 30 mL/min/1.73 m²)
  • Iron-deficiency anaemia until ferritin is restored
Key Interactions
  • Oral glucose-lowering drugs (metformin, glipizide, empagliflozin)
  • Insulin
  • Antihypertensives (lisinopril, amlodipine, losartan, hydrochlorothiazide)
  • Nitrates and phosphodiesterase-5 inhibitors (isosorbide, sildenafil, tadalafil)
  • Non-steroidal anti-inflammatory drugs (ibuprofen, naproxen, aspirin)
  • Iron and antacid products (ferrous sulfate, calcium carbonate)
  • Blood-sugar-lowering supplements (berberine, chromium picolinate, alpha-lipoic acid, cinnamon extract)
  • Blood-pressure-lowering supplements (beetroot nitrate, garlic extract, magnesium, hibiscus)
  • Other polyphenol supplements (quercetin, resveratrol, curcumin)
  • Concurrent açaí, date, or manuka honey intake

Risk & Side Effects

  • Medium: Uncharacterised safety above dietary exposure
  • Low: Pro-oxidant cytotoxicity at high concentrations; additive glucose and blood-pressure lowering
  • Speculative: Reduced non-heme iron absorption; blunting of exercise-induced adaptation; uncertain effects alongside cancer therapy

Monitoring

Marker Target Why
Fasting glucose 75–86 mg/dL Primary claimed metabolic effect
HbA1c 4.8–5.3% Three-month glucose average, less noisy than single readings
Fasting insulin 2–5 μIU/mL Detects insulin resistance before glucose rises
HOMA-IR Below 1.0 Single number combining fasting glucose and insulin
Triglycerides Below 80 mg/dL The lipid fraction that fell most in animal work
HDL-C Above 55 mg/dL men, above 65 women Balances the triglyceride reading; the ratio matters more than either alone
LDL-C with particle number LDL-C below 100 mg/dL, ApoB below 80 mg/dL Catches any adverse lipid shift
hs-CRP Below 0.5 mg/L Tracks the anti-inflammatory claim
ALT 10–26 U/L men, 10–19 women Primary safety marker for the liver-cell toxicity signal
AST 10–26 U/L Pairs with ALT to separate liver from muscle origin
eGFR Above 90 mL/min/1.73 m² Conjugated metabolites clear renally
Ferritin 50–150 ng/mL Detects the theoretical iron-binding effect
Home systolic blood pressure 105–120 mmHg Direct readout of the animal blood-pressure finding
Adiponectin Above 10 μg/mL The specific hormone that rose in the rodent fat-mass study

Cadence: Liver enzymes and kidney function at four weeks, the full panel at three months, and every six months thereafter; where glucose-lowering or pressure-lowering medication is already in use, that first interval shortens to two weeks with daily home readings.

Qualitative Assessment

  • Digestive comfort — bloating, stool consistency, and frequency
  • Energy stability across the day
  • Sleep continuity and number of night wakings
  • Skin appearance, inflammation, and redness
  • Waist circumference, monthly
  • Training recovery and session quality