Skip to Content
Merck
  • Vitamin C intake and breast cancer mortality in a cohort of Swedish women.

Vitamin C intake and breast cancer mortality in a cohort of Swedish women.

British journal of cancer (2013-06-06)
H R Harris, L Bergkvist, A Wolk
ABSTRACT

Vitamin C may influence cancer progression through its antioxidant properties. However, the evidence from observational epidemiologic studies on vitamin C intake and survival following breast cancer diagnosis is not consistent, and the safety of vitamin C supplements following breast cancer diagnosis has not been extensively studied. Using a food-frequency questionnaire we investigated whether vitamin C intake was associated with survival among 3405 women diagnosed with invasive breast cancer in the Swedish Mammography Cohort. From 1987-2010, there were 1055 total deaths with 416 deaths from breast cancer. Women in the highest quartile of pre-diagnosis vitamin C intake had an adjusted HR (95% CI) of breast cancer death of 0.75 (0.57-0.99) compared with those in the lowest quartile (Ptrend=0.03). There was a borderline significant association between vitamin C intake and total mortality (HR=0.84; 95% CI=0.71-1.00; Ptrend=0.08). Among 717 breast cancer cases for whom post-diagnosis supplement use was available, there was no association between vitamin C supplement use (≈1000 mg) and breast cancer-specific mortality (HR=1.06; 95% CI=0.52-2.17). Our findings suggest that dietary vitamin C intake before breast cancer diagnosis may be associated with breast cancer survival. In addition, post-diagnosis vitamin C supplementation at the level observed in our population was not associated with survival.

MATERIALS
Product Number
Brand
Product Description

Ascorbic acid, European Pharmacopoeia (EP) Reference Standard
Pricing and availability is not currently available.
Supelco
Ascorbic Acid, Pharmaceutical Secondary Standard; Certified Reference Material
Pricing and availability is not currently available.
Sigma-Aldrich
(+)-Sodium L-ascorbate, BioXtra, ≥99.0% (NT)
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, puriss. p.a., ACS reagent, reag. ISO, Ph. Eur., 99.7-100.5% (oxidimetric)
Pricing and availability is not currently available.
Sigma-Aldrich
(+)-Sodium L-ascorbate, powder, BioReagent, suitable for cell culture
Pricing and availability is not currently available.
Sigma-Aldrich
(+)-Sodium L-ascorbate, crystalline, ≥98%
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, tested according to Ph. Eur.
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, 99%
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, puriss. p.a., ≥99.0% (RT)
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, BioUltra, ≥99.5% (RT)
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, ACS reagent, ≥99%
Pricing and availability is not currently available.
Supelco
L-Ascorbic acid, analytical standard
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, FCC, FG
Pricing and availability is not currently available.
Supelco
Sodium ascorbate, Pharmaceutical Secondary Standard; Certified Reference Material
Pricing and availability is not currently available.
Supelco
L-Ascorbic acid, certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, BioXtra, ≥99.0%, crystalline
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, reagent grade, crystalline
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, suitable for cell culture, suitable for plant cell culture, ≥98%
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, powder, suitable for cell culture, γ-irradiated
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, reagent grade
Pricing and availability is not currently available.
Sigma-Aldrich
L-Ascorbic acid, meets USP testing specifications
Pricing and availability is not currently available.