# Hans‐Peter Helfrich

**Type:** Researchers  
**Canonical URL:** https://scholariq.org/researchers/hans-peter-helfrich/

## Facts

| Field | Value |
| --- | --- |
| Citations | 558 |
| Field | Phytochemicals and Antioxidant Activities |
| h-index | 13 |
| i10-index | 13 |
| Last Known Institution | University of Bonn |
| OpenAlex ID | https://openalex.org/A5110139436 |
| Works | 25 |

## Researcher papers

- [Epicatechin ingested via cocoa products reduces blood pressure in humans: a nonlinear regression model with a Bayesian approach](https://scholariq.org/papers/epicatechin-ingested-via-cocoa-products-reduces-blood-pressure-in-humans-a/)
- [Kinetics of ʟ-Theanine Uptake and Metabolism in Healthy Participants Are Comparable after Ingestion of ʟ-Theanine via Capsules and Green Tea4](https://scholariq.org/papers/kinetics-of-theanine-uptake-and-metabolism-in-healthy-participants-are/)
- [Regular Intake of a Usual Serving Size of Flavanol-Rich Cocoa Powder Does Not Affect Cardiometabolic Parameters in Stably Treated Patients with Type 2 Diabetes and Hypertension—A Double-Blinded, Randomized, Placebo-Controlled Trial](https://scholariq.org/papers/regular-intake-of-a-usual-serving-size-of-flavanol-rich-cocoa-powder-does-not/)
- [A trust region algorithm for parametric curve and surface fitting](https://scholariq.org/papers/a-trust-region-algorithm-for-parametric-curve-and-surface-fitting/)
- [A nutritive dose of pure (–)-epicatechin does not beneficially affect increased cardiometabolic risk factors in overweight-to-obese adults—a randomized, placebo-controlled, double-blind crossover study](https://scholariq.org/papers/a-nutritive-dose-of-pure-epicatechin-does-not-beneficially-affect-increased/)
- [A trust region method for implicit orthogonal distance regression](https://scholariq.org/papers/a-trust-region-method-for-implicit-orthogonal-distance-regression/)
- [Fehlerabsch�tzungen f�r das Galerkinverfahren zur L�sung von Evolutionsgleichungen](https://scholariq.org/papers/fehlerabsch-tzungen-f-r-das-galerkinverfahren-zur-l-sung-von/)
- [Oral High-Dose Vitamin D Dissolved in Oil Raised Serum 25-Hydroxy-Vitamin D to Physiological Levels in Obese Patients After Sleeve Gastrectomy—A Double-Blind, Randomized, and Placebo-Controlled Trial](https://scholariq.org/papers/oral-high-dose-vitamin-d-dissolved-in-oil-raised-serum-25-hydroxy-vitamin-d-to/)
- [Impact of a Usual Serving Size of Flavanol-Rich Cocoa Powder Ingested with a Diabetic-Suitable Meal on Postprandial Cardiometabolic Parameters in Type 2 Diabetics—A Randomized, Placebo-Controlled, Double-Blind Crossover Study](https://scholariq.org/papers/impact-of-a-usual-serving-size-of-flavanol-rich-cocoa-powder-ingested-with-a/)
- [Fortifying a meal with oyster mushroom powder beneficially affects postprandial glucagon-like peptide-1, non-esterified free fatty acids and hunger sensation in adults with impaired glucose tolerance: a double-blind randomized controlled crossover trial](https://scholariq.org/papers/fortifying-a-meal-with-oyster-mushroom-powder-beneficially-affects-postprandial/)

## Researcher topics

- [Phytochemicals and Antioxidant Activities](https://scholariq.org/topics/phytochemicals-and-antioxidant-activities/)
- [Advanced Numerical Methods in Computational Mathematics](https://scholariq.org/topics/advanced-numerical-methods-in-computational-mathematics/)
- [Advanced Mathematical Modeling in Engineering](https://scholariq.org/topics/advanced-mathematical-modeling-in-engineering/)
- [Diabetes, Cardiovascular Risks, and Lipoproteins](https://scholariq.org/topics/diabetes-cardiovascular-risks-and-lipoproteins/)
- [Food composition and properties](https://scholariq.org/topics/food-composition-and-properties/)

## Researcher university

- [University of Bonn](https://scholariq.org/institutions/university-of-bonn/)

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Source: ScholarIQ — public research metadata, principally OpenAlex. See https://scholariq.org/sources/ for provenance and https://scholariq.org/methodology/ for what these figures mean.