Vitamin C Dietary Supplements: An Objective Review of the Clinical Evidence. Part II

2007 ◽  
Vol 3 (3) ◽  
pp. 154-158
Author(s):  
Mark A. Moyad ◽  
Angelica S. Vrablic ◽  
Maile A. Combs
Keyword(s):  
Vitamin C ◽  
Dietary Supplements ◽  
Clinical Evidence

scholarly journals High-dose vitamin C enhances cancer immunotherapy

2020 ◽  
Vol 12 (532) ◽  
pp. eaay8707 ◽  
Author(s):  
Alessandro Magrì ◽  
Giovanni Germano ◽  
Annalisa Lorenzato ◽  
Simona Lamba ◽  
Rosaria Chilà ◽  
...  
Keyword(s):  
Immune System ◽  
Vitamin C ◽  
Clinical Evidence ◽  
High Dose ◽  
Dependent Manner ◽  
Cancer Cell Growth ◽  
Mutational Burden ◽  
Cancer Types ◽  
High Doses ◽  
High Dose Vitamin

Vitamin C (VitC) is known to directly impair cancer cell growth in preclinical models, but there is little clinical evidence on its antitumoral efficacy. In addition, whether and how VitC modulates anticancer immune responses is mostly unknown. Here, we show that a fully competent immune system is required to maximize the antiproliferative effect of VitC in breast, colorectal, melanoma, and pancreatic murine tumors. High-dose VitC modulates infiltration of the tumor microenvironment by cells of the immune system and delays cancer growth in a T cell–dependent manner. VitC not only enhances the cytotoxic activity of adoptively transferred CD8 T cells but also cooperates with immune checkpoint therapy (ICT) in several cancer types. Combination of VitC and ICT can be curative in models of mismatch repair–deficient tumors with high mutational burden. This work provides a rationale for clinical trials combining ICT with high doses of VitC.

scholarly journals Vitamins and Minerals for Energy, Fatigue and Cognition: A Narrative Review of the Biochemical and Clinical Evidence

Nutrients ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 228 ◽  
Author(s):  
Anne-Laure Tardy ◽  
Etienne Pouteau ◽  
Daniel Marquez ◽  
Cansu Yilmaz ◽  
Andrew Scholey
Keyword(s):  
Vitamin C ◽  
Oxygen Transport ◽  
Metabolic Pathways ◽  
Clinical Evidence ◽  
Psychological Symptoms ◽  
Psychological Processes ◽  
Physical Fatigue ◽  
Cellular Functions ◽  
Muscular Function ◽  
Neuronal Functions

Vitamins and minerals are essential to humans as they play essential roles in a variety of basic metabolic pathways that support fundamental cellular functions. In particular, their involvement in energy-yielding metabolism, DNA synthesis, oxygen transport, and neuronal functions makes them critical for brain and muscular function. These, in turn, translate into effects on cognitive and psychological processes, including mental and physical fatigue. This review is focused on B vitamins (B1, B2, B3, B5, B6, B8, B9 and B12), vitamin C, iron, magnesium and zinc, which have recognized roles in these outcomes. It summarizes the biochemical bases and actions of these micronutrients at both the molecular and cellular levels and connects them with cognitive and psychological symptoms, as well as manifestations of fatigue that may occur when status or supplies of these micronutrients are not adequate.

scholarly journals Nutraceuticals and Hypertensive Disorders in Pregnancy: The Available Clinical Evidence

Nutrients ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 378 ◽  
Author(s):  
Silvia Fogacci ◽  
Federica Fogacci ◽  
Arrigo F.G. Cicero
Keyword(s):  
Blood Pressure ◽  
Dietary Supplements ◽  
Search Strategy ◽  
Clinical Evidence ◽  
Meta Analysis ◽  
Cochrane Collaboration ◽  
Hypertensive Disorders ◽  
Pressure Lowering ◽  
Hypertensive Disorders In Pregnancy ◽  
In Pregnancy

The aim of the present critical review is to summarize the available clinical evidence supporting the use of some dietary supplements that have been shown to lower blood pressure in hypertensive pregnant women. A systematic search strategy was carried out to identify trials in MEDLINE (National Library of Medicine, Bethesda, Maryland, MD, USA; January 1980 to September 2019) and the Cochrane Register of Controlled Trials (The Cochrane Collaboration, Oxford, UK). The terms ‘nutraceuticals’, ‘dietary supplements’, ‘pregnancy’, ‘pre-eclampsia’, ‘clinical trial’, and ‘human’ were incorporated into an electronic search strategy. The references of the identified studies and review articles were reviewed to look for additional studies of interest. We preferably selected papers that reported recent comprehensive reviews or meta-analysis, or original clinical trials of substances with blood pressure-lowering or vascular protective effect in pregnancy. There is a relative body of evidence that supports the use of calcium, vitamin D, folic acid, and resveratrol in preventing the development of hypertensive disorders in pregnancy, and evidence supporting drug treatment too. Further clinical research is advisable to identify the dosage and timing of the supplementation, the group of women that might benefit the most from this approach, and the nutraceuticals with the best cost-effectiveness and risk-benefit ratio for widespread use in clinical practice.

Prevalent Use of Dietary Supplements among People Who Exercise at a Commercial Gym

2004 ◽  
Vol 14 (4) ◽  
pp. 481-492 ◽  
Author(s):  
Laura J. Morrison ◽  
Frances Gizis ◽  
Barbara Shorter
Keyword(s):  
Vitamin E ◽  
Vitamin C ◽  
Dietary Supplements ◽  
Dietary Supplement ◽  
Long Island ◽  
Exercise Program ◽  
Convenience Sample ◽  
Supplement Use ◽  
Dietary Supplement Use

Supplement use was surveyed in a convenience sample of persons who exercised regularly at a Long Island, NY gym. Participants, age at least 18 y, completed anonymous questionnaires. A majority (84.7%) took supplements. Many consumed multivitamin/minerals (MVM; 45%), protein shakes/bars (PRO; 42.3%), vitamin C (34.7%), and vitamin E (VE; 23.4%) at least 5 times per wk. Other dietary supplements were used less frequently or by fewer participants. Ephedra was consumed by 28% at least once per wk. Choices and reasons for dietary supplement use varied with age of the participant. More of the oldest consumed MVM or VE, while those 45 y or younger chose PRO. Those younger than 30 consumed creatine more frequently. The oldest participants took supplements to prevent future illness, while others took supplements to build muscle. The reason for committing to an exercise program influenced supplement use. Bodybuilders more frequently consumed PRO, creatine, and ephedra compared to those exercising for health reasons.

scholarly journals Myth Busters: Dietary Supplements and COVID-19

2020 ◽  
Vol 54 (8) ◽  
pp. 820-826 ◽  
Author(s):  
Kathleen K. Adams ◽  
William L. Baker ◽  
Diana M. Sobieraj
Keyword(s):  
Social Media ◽  
Vitamin D ◽  
Vitamin C ◽  
Dietary Supplements ◽  
Evidence Based ◽  
Efficacy And Safety ◽  
Treatment And Prevention ◽  
Social Media Platforms ◽  
Evidence Based Guidelines

News and social media platforms have implicated dietary supplements in the treatment and prevention of coronavirus disease 2019 (COVID-19). During this pandemic when information quickly evolves in the presence of contradicting messages and misinformation, the role of the pharmacist is essential. Here, we review theoretical mechanisms and evidence related to efficacy and safety of select supplements in the setting of COVID-19, including vitamin C, vitamin D, zinc, elderberry, and silver. Evidence evaluating these supplements in COVID-19 patients is lacking, and providers and patients should not rely on dietary supplements to prevent or treat COVID-19. Rather, reference to evidence-based guidelines should guide treatment decisions.

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