Comparison
Alpha-Lipoic Acid vs EGCG
Side-by-side of Alpha-Lipoic Acid and EGCG. Every row below is pulled from the compound schema and will update as our data grows. For deeper reads, follow through to each compound page.
Alpha-Lipoic Acid
Alpha lipoic acid supplement guide: 600 mg/day oral dosing, R-ALA vs racemic absorption, neuropathy trial data, antioxidant mechanism, interactions.
EGCG
EGCG supplement guide: 300-600 mg/day green tea catechin for fat loss and cardiovascular markers. Hepatotoxicity risk above 800 mg/day fasted.
Effects at a glance
Alpha-Lipoic Acid
- •Approved Rx for diabetic neuropathy in Germany at 600 mg/day IV (Thioctacid) since 1960s
- •Improves neuropathy symptoms (TSS, NIS) at 600 mg/day IV across ALADIN and SYDNEY trials
- •R-ALA enantiomer absorbs 40-100% better than racemic mixtures
- •Activates AMPK; produces small HbA1c reductions in T2DM
- •Plasma half-life ~30 minutes; split dosing or sustained-release is standard
- •Hypoglycemia risk with insulin or sulfonylureas; medication adjustment may be required
EGCG
- •Modest fat loss (~1.3 kg over 12 weeks) when combined with caffeine and caloric deficit
- •Small reductions in LDL cholesterol (3-6 mg/dL) and systolic blood pressure (2-3 mmHg)
- •EFSA flags hepatotoxicity risk above 800 mg/day, particularly when taken fasted
- •Bioavailability is 0.1-1.0%; gut microbiome variation drives population-variable response
- •Green tea extract typically combines EGCG with caffeine and L-theanine for additive effects
- •Reduces non-heme iron absorption when co-administered with meals
Side-by-side
| Attribute | Alpha-Lipoic Acid | EGCG |
|---|---|---|
| Category | supplement | natural |
| Also known as | ALA, thioctic acid, R-ALA, R-lipoic acid | epigallocatechin gallate, green tea extract |
| Half-life (hr) ↗ | 0.5 | 3 |
| Typical dose (mg) ↗ | 600 | 400 |
| Dosing frequency | 1 to 3 times daily on empty stomach | 1 to 2 times daily with food |
| Routes | oral, iv | oral |
| Onset (hr) | 0.5 | 1.5 |
| Peak (hr) | 1 | 2 |
| Molecular weight | 206.33 | 458.37 |
| Molecular formula | C8H14O2S2 | C22H18O11 |
| Mechanism | Dual lipid- and water-soluble antioxidant; redox cycles with dihydrolipoic acid (DHLA) to scavenge ROS, regenerate vitamin E and C, and chelate transition metals. Activates AMPK in liver and muscle; cofactor for pyruvate and alpha-ketoglutarate dehydrogenase complexes. | Inhibits catechol-O-methyltransferase (COMT) to prolong norepinephrine signaling; activates AMPK; scavenges reactive oxygen species via gallate ester; modulates gut microbiome and pancreatic lipase activity. |
| Legal status | Dietary supplement (US, UK, Canada, most EU); prescription drug for diabetic neuropathy in Germany | Dietary supplement; warning labels required above 800 mg/day in some EU jurisdictions |
| WADA status | allowed | allowed |
| DEA / Rx | Not scheduled | Not scheduled |
| Pregnancy | Insufficient data; precautionary avoidance | Avoid high-dose extracts; moderate green tea consumption appears acceptable |
| CAS | 62-46-4 | 989-51-5 |
| PubChem CID | 864 | 65064 |
| Wikidata | Q161227 | Q307091 |
Safety profile
Alpha-Lipoic Acid
Common side effects
- nausea
- abdominal discomfort
- diarrhea
- sulfurous odor
- rash (rare)
Contraindications
- pregnancy and lactation (insufficient safety data)
- active insulin autoimmune syndrome predisposition
Interactions
- insulin and sulfonylureas: additive hypoglycemia; medication dose adjustment may be required(major)
- thyroid hormone: may reduce T4 to T3 conversion at high doses(moderate)
- biotin: ALA competes with biotin uptake; chronic use can induce biotin insufficiency(minor)
- iron supplements: ALA chelates iron and reduces absorption; separate dosing(moderate)
- chemotherapy (oxidative-stress-dependent agents): theoretical interference; coordinate with oncology team(moderate)
EGCG
Common side effects
- nausea
- abdominal discomfort
- diarrhea
- jitteriness (with caffeine)
- sleep disruption (with caffeine)
Contraindications
- pregnancy at high-dose extracts
- active liver disease
- iron deficiency anemia (separate dosing)
Interactions
- iron supplements: reduces non-heme iron absorption; separate by 2 to 3 hours(moderate)
- anticoagulants: additive effects at high catechin doses(minor)
- beta-blockers (nadolol): reduced absorption when taken simultaneously(moderate)
- hepatotoxic supplements (high-dose niacin, kava): theoretical additive hepatotoxicity at high EGCG doses(moderate)
- stimulants and caffeine: additive thermogenic and cardiovascular effects(minor)
Which Should You Take?
Alpha-Lipoic Acid and EGCG score evenly on the criteria we weight (goal breadth, legal accessibility, evidence depth). The conditionals below should drive the decision more than any aggregate score.
- → If your priority is long-term neuroprotection, pick Alpha-Lipoic Acid.
- → If your priority is cardiovascular health, pick EGCG.
- → If your priority is metabolic health and glucose control, pick Alpha-Lipoic Acid.
Edge case: Half-lives differ materially (Alpha-Lipoic Acid ~0.5 hr vs EGCG ~3 hr). EGCG reaches steady state faster; Alpha-Lipoic Acid is easier to dial in if tolerability is uncertain.
Default choice: either is defensible. Alpha-Lipoic Acid edges out on goal breadth + legal accessibility; EGCG is the right call if your priority sits in the goals listed above.
This verdict is generated from each compound's schema (goals, legal status, evidence outcomes, dosing route). It updates automatically as our compound data evolves; the deeper read sits on each individual compound page.
Common questions
What is the difference between Alpha-Lipoic Acid and EGCG?
Alpha-Lipoic Acid and EGCG differ in category (supplement vs natural), mechanism, and typical dosing. See the side-by-side table for full details.
Which has a longer half-life, Alpha-Lipoic Acid or EGCG?
Alpha-Lipoic Acid half-life is 0.5 hours; EGCG half-life is 3 hours.
Can you stack Alpha-Lipoic Acid with EGCG?
Stack compatibility depends on mechanism overlap, legal status, and individual response. Check each compound page for specific interactions and contraindications before combining.
Go deeper