Flavonoid dosage

What are flavonoids?

Flavonoids are phenolic compounds naturally present in many plants, fruits, vegetables, teas, and botanical extracts. They are widely recognized for their antioxidant, anti-inflammatory, and protective properties against cellular oxidative stress.

They play a key role in nutraceutical formulations, natural cosmetics, functional products, and dietary supplements. Their dosage ensures the quality, stability, and concentration of plant-based active ingredients.

Why measure flavonoids?

The dosage of flavonoids is essential for:

• Guarantee the quality of plant extracts or raw powders
• Define an antioxidant profile for food or cosmetic products
• Validate the conformity of a batch with respect to specifications (plant raw materials)
• Measuring the effectiveness of a nutritional supplement or antioxidant cosmetic product
• Promoting products with a high polyphenol content in a marketing or scientific approach

Results are often expressed in quercetin equivalents, a reference flavonoid.

Available analysis methods

YesWeLab offers several validated methods according to the analytical objectives:

• Colorimetric spectrophotometric method (reaction with aluminum chloride): overall determination of total flavonoids in plant extracts or drinks
• HPLC (high performance liquid chromatography): separation and specific dosage of individual flavonoids (quercetin, kaempferol, rutin, etc.)
• LC-MS (liquid chromatography coupled with mass spectrometry): targeted analysis at trace levels in complex matrices

These methods can be adapted to different types of products and expected levels of accuracy.

Affected matrices

• Dry or liquid plant extracts
• Plant powders or raw materials
• Food supplements (capsules, tablets, oral solutions)
• Functional drinks, infusions, vegetable juices
• Cosmetic products (serums, creams, masks)
• Foods rich in polyphenols

The results enable reliable analytical traceability in the context of R&D, quality control or product certification.

Regulatory context and quality

Flavonoids are not subject to specific legal limits, but their dosage:

• Supports health or antioxidant claims
• Justifies the biological properties of a plant product
• Integrates with HACCP, ISO 22000 or FSSC approaches
• Required in B2B supplier contracts, particularly for nutraceutical and export markets

The analysis is also useful for monitoring the stability of active ingredients over time or under different formulation conditions.

Why choose YesWeLab?

YesWeLab supports you in structuring your flavonoid analyses with ISO 17025 or COFRAC accredited laboratories, specialized in phytochemistry and plant quality control.

Our service includes:

• The choice of analytical method depending on the matrix and your objectives
• Scientific interpretation of results on request
• Fast and centralized management via our digital platform
• A single interface to manage all your analyses, from request to report rendering

Need to measure flavonoids in your extracts or formulated products?

Contact YesWeLab to ensure the performance and quality of your plant-based active ingredients. Contact us or add the analysis to your online quote.