Loading…
We use essential cookies (authentication, your saved goals/stack) by default. With your permission we'll also enable privacy-respecting analytics (Vercel Web Analytics, anonymous load-time metrics) and error-replay diagnostics (Sentry — DOM snapshots only when an error fires) so we can fix bugs faster. Learn more
Head-to-head evidence comparison — which supplement is right for you?
Aged Garlic Extract wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
13 of 14 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
2 of 4 studies with measurable effects showed benefit.
Top outcomes
600-1200mg aged garlic extract
With meals, Split into 2 doses
Kyolic Aged Garlic Extract (most studied)
1-5mg (or wheat germ extract equivalent)
Morning, With or without food
Wheat germ extract standardized to spermidine
8-12 weeks
12+ weeks
4-8 weeks
Ongoing
Ongoing
Effects of aged garlic extract on blood pressure in hypertensive patients: A systematic review and meta-analysis of randomized controlled trials
Prostaglandins & other lipid mediators (2024) · Meta analysis · n=584
AGE tea supplementation reduces systolic blood pressure (SBP) (WMD: -4.03; %95CI: -6.87, -1.20; I2: 57.1 %) and diastolic blood pressure (DBP) (WMD: -1.44; 95 % CI= -2.87, -0.02; P = 0.052; I2: 36.8 %; P: 0.105).
Effect of garlic extract on markers of lipid metabolism and inflammation in coronary artery disease (CAD) patients: A systematic review and meta-analysis
Phytotherapy research : PTR (2023) · Meta analysis
The standardized mean difference with 95% CI was calculated using fixed-effect or random-effect models.
A meta-analysis of randomized, double-blind, placebo-controlled trials for the effects of garlic on serum lipid profiles
Journal of the science of food and agriculture (2012) · Meta analysis · n=26
Compared with the placebo groups, serum TC and TG levels in the garlic group were reduced by 0.28 (95% CI, -0.45, -0.11) mmol L⁻¹ (P = 0.001) and 0.13 (95% CI, -0.20, -0.06) mmol L⁻¹ (P < 0.001), respectively.
Dietary polyamine intake and risk of colorectal adenomatous polyps
The American journal of clinical nutrition (2012) · Rct · n=1164
A dietary intake of polyamines above the median amount in the study population was associated with 39% increased risk of colorectal adenoma at follow-up (adjusted OR: 1.39; 95% CI: 1.06, 1.83) in the pooled sample.
Spermidine induces autophagy and extends lifespan
Nature Cell Biology (2009) · Preclinical
Extended lifespan in yeast, flies, worms, mice
Mechanism and clinical implication of gut dysbiosis in degenerative abdominal aortic aneurysm: A systematic review
Asian journal of surgery (2024) · Systematic review
With our expanding knowledge of the downstream pathogenic mechanisms of gut dysbiosis, novel therapeutics such as short-chain fatty acids and spermidine, as well as prognostic biomarkers such as TMAO have yielded promising preclinical results.
Meta-analysis shows modest SBP reduction of ~4 mmHg and DBP reduction of ~1.4 mmHg. Effect size is relatively small compared to pharmaceutical interventions. Studies primarily used aged garlic extract forms.
Based on single small RCT (n=44) showing endothelial function improvement. Limited data on direct spermidine supplementation effects. Most evidence comes from indirect polyamine production studies.
AI-estimated from published studies. Interpret as directional guidance.
Aged Garlic Extract has a higher evidence score (9/10 vs 8/10) and wins in 2 of 3 categories.
For healthy aging, Spermidine has a higher relevance score (90 vs 58).
No known interactions between Aged Garlic Extract and Spermidine have been documented in our database. However, always consult a healthcare provider before combining supplements.