Everything DoseRank tracks on the flavonoids shelf — Grape Seed Extract, Citrus Bioflavonoids and Thiamine Mononitrate. The category itself is never ranked: 12 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing flavonoids supplements without a goal makes no sense — grape seed extract, citrus bioflavonoids and thiamine mononitrate do different jobs, and “best” flips depending on which job you're hiring for. These are the 34 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
EdemaSwelling due to excess fluid accumulation.7 rankedModerate-strong
VertigoFalse sensation of spinning or motion.1 rankedModerate-strong
C-reactive proteinAcute-phase inflammatory marker.9 rankedLimited
Tinnitus severityLoudness, distress, or impact of ringing in the ears.1 rankedLimited
Resting heart rateBaseline heart rate measured at rest.5 rankedStrong
Vascular functionOverall health and reactivity of the circulatory system.5 rankedModerate-strong
Nitric oxide bioavailabilityAvailability of nitric oxide relevant to vascular function.5 rankedModerate-strong
Oxidative stress biomarkersLaboratory indicators of oxidative damage or redox imbalance.9 rankedModerate-strong
Thiamine statusBiochemical sufficiency of vitamin B1.3 rankedStrong
MicrocirculationPerfusion in small vessels and capillary beds.2 rankedStrong
NauseaFeeling of sickness or urge to vomit.7 rankedStrong
Vitamin B6 statusBiochemical sufficiency of pyridoxine-related compounds.3 rankedStrong
Riboflavin statusBiochemical sufficiency of vitamin B2.2 rankedStrong
Blood pressureArterial pressure; direction of benefit depends on baseline status.11 rankedStrong
Niacin statusBiochemical sufficiency of vitamin B3.2 rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best flavonoids supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 12 products against that goal's trials.