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 about cookies
Head-to-head evidence comparison — which supplement is right for you?
Vitamin D3 wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
Verdict
Probably helps
18 of 30 studies with measurable effects showed benefit.
Top outcomes
300mg standardized extract twice daily (providing ~50mg aescin per dose; ~100mg aescin/day)
with-meals
Aescin-standardized, enteric-coated seed extract
2000-4000 IU daily
Morning with breakfast
D3 (cholecalciferol) softgel or liquid
2-12 weeks
2-8 weeks
Days
4-8 weeks
4-8 weeks
2-4 weeks
4-8 weeks
Horse chestnut seed extract for chronic venous insufficiency.
The Cochrane database of systematic reviews (2012) · Meta analysis
Significantly reduced leg pain, edema, and itching vs placebo
Horse chestnut seed extract for chronic venous insufficiency.
The Cochrane database of systematic reviews (2006) · Meta analysis
Reduced leg volume and ankle/calf circumference
Horse-chestnut seed extract for chronic venous insufficiency. A criteria-based systematic review.
Archives of dermatology (1998) · Systematic review
Most RCTs favored HCSE over placebo
Vitamin D supplementation vs. placebo and incident type 2 diabetes in an ancillary study of the randomized Vitamin D and Omega-3 Trial
Nature communications (2025) · Meta analysis · n=5205
Mean body mass index (BMI) was 27.5 kg/m2 (SD = 5.3), with 51% female and 17% Black race/ethnicity.
Vitamin D Supplementation for Patients with Dysmenorrhoea: A Meta-Analysis with Trial Sequential Analysis of Randomised Controlled Trials
Nutrients (2024) · Meta analysis · n=687
TSA revealed that the current RCTs provide sufficient information.
Vitamin D and respiratory tract infections
BMJ (2017) · Meta analysis · n=11321
12% reduction in respiratory infections overall
Meta-analysis showed 12% overall reduction in respiratory infections, with greater benefits in severely deficient individuals. Daily dosing more effective than bolus. Conservative estimate assumes most users not severely deficient.
AI-estimated from published studies. Interpret as directional guidance.
Vitamin D3 has a higher evidence score (7.5/10 vs 7/10) and wins in 3 of 3 categories.
For reduce inflammation, Vitamin D3 has a higher relevance score (58 vs 45).
No known interactions between Horse Chestnut and Vitamin D3 have been documented in our database. However, always consult a healthcare provider before combining supplements.