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Vitamin C formulation no longer in production
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The purpose of this study is to determine if crystalline vitamin C supplementation can acutely increase skeletal muscle vitamin C concentrations and if this can be potentiated by administering vitamin C using Phosphycellâ„¢ Technology - a phosphatidylcholine-lipid encapsulation technology.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Crystalline vitamin C supplementation | Active Comparator | 1000 mg of vitamin C ingested in crystalline form |
|
| Phosphatidylcholine-lipid encapsulated vitamin C supplementation | Experimental | 1000 mg of vitamin C ingested in phosphatidylcholine-lipid encapsulated form |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Phosphatidylcholine-lipid encapsulated vitamin C | Dietary Supplement | Ingesting 1000 mg of vitamin C in phosphatidylcholine-lipid encapsulated form |
|
| Measure | Description | Time Frame |
|---|---|---|
| Skeletal muscle vitamin C concentrations | Skeletal muscle vitamin C concentrations 6 hours after vitamin C ingestion will be measured using HPLC and compared to baseline | 6 hours after vitamin C ingestion |
| Skeletal muscle vitamin C concentrations | Skeletal muscle vitamin C concentrations 12 hours after vitamin C ingestion will be measured using HPLC and compared to baseline and 6 hours after vitamin C ingestion | 12 hours after vitamin C ingestion |
| Measure | Description | Time Frame |
|---|---|---|
| Blood plasma vitamin C concentrations | Blood plasma vitamin C concentrations will be measured using HPLC during the 24 hour post vitamin C ingestion period | 24 hours after vitamin C ingestion |
| White blood cell vitamin C concentrations |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Francis Stephens | University of Exeter | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Sport and Health Sciences | Exeter | Devon | EX1 2LU | United Kingdom |
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| Crystalline vitamin C | Dietary Supplement | Ingesting 1000 mg of vitamin C in crystalline form |
|
White blood cell vitamin C concentrations will be measured 6 hours after vitamin C ingestion using HPLC and compared to baseline
| 6 hours after vitamin C ingestion |
| White blood cell vitamin C concentrations | White blood cell vitamin C concentrations will be measured 24 hours after vitamin C ingestion using HPLC and compared to baseline and 3 hours post vitamin C ingestion | 24 hours after vitamin C ingestion |
| Cardiovascular function | Cardiovascular function will be measuring using a finger plethysmograph during the 24 hour post vitamin C ingestion period | 24 hours after vitamin C ingestion |