2. Your Bones May Get Stronger <\/p>\n
- \n
- Low levels of vitamins C and D are associated with low bone mineral density<\/a>, brittle bones (osteoporosis), and an increased risk of bone fractures.<\/li>\n
- Taking vitamin C and D together increases bone mass by boosting levels of a protein called osteocalcin in your bones. These vitamins reduce the likelihood of bone fractures.<\/li>\n
- Vitamins C and D are believed to have a synergistic effect on bone health.<\/li>\n<\/ul>\n
3. Your Wounds May Heal Faster <\/p>\n
- \n
- Vitamins C and D play a crucial role in wound healing.<\/li>\n
- Because they have different roles in the process, taking them together may help your skin heal more effectively.<\/li>\n
- Vitamin D helps the skin resist infections and aids in wound healing.<\/li>\n
- Vitamin C is a powerful antioxidant that reduces inflammation and helps the body produce the protein collagen<\/a>, allowing new skin to form.<\/li>\n<\/ul>\n
4. Your Digestive Health May Improve <\/p>\n
- \n
- Taking vitamin C and D can help improve your gut health<\/a> and prevent harmful bacteria from entering your digestive tract.<\/li>\n
- A small study of 23 male athletes found that taking vitamins C and D, as well as turmeric, reduced gastrointestinal problems.<\/li>\n
- Because the intervention included turmeric,<\/a> though, it’s unknown how much of the benefit was due to vitamin C or D specifically.<\/li>\n<\/ul>\n
5. You May Have Better Cancer Outcomes <\/p>\n
- \n
- People with a specific type of acute myeloid leukemia (AML), a bone marrow cancer, have a better chance of survival if they take vitamins C and D.<\/li>\n
- Taking vitamins C and D together also lowers the risk of serious side effects of cancer treatments, such as bleeding, inflammation, and infections, in people who have AML.<\/li>\n
- More research is needed to know the effects of vitamins C and D on cancer; much of the evidence to date is mixed. <\/li>\n
- Discuss these or any supplements with your oncologist before trying them.<\/li>\n<\/ul>\n
Dietary Sources of Vitamin C and D <\/p>\n
- \n
- You can increase your levels of vitamins C and D through your diet or by taking dietary supplements.<\/li>\n
- Boost vitamin C levels by eating more citrus fruits and vegetables. 1\/2 cup of raw red pepper or 3\/4 cup of orange juice contains 100 mg of vitamin C.<\/li>\n
- Healthy adults require between 75 and 120 milligrams (mg) of vitamin C daily<\/strong>, depending on their gender and whether they are pregnant or breastfeeding. Smokers require an additional 35 mg daily.<\/li>\n
- Vitamin D is formed when ultraviolet rays from the sun contact your skin. Foods rich in vitamin D include salmon, tuna, and fish liver oil.<\/li>\n
- Healthy adults need 15 to 20 micrograms (mcg), or 600 to 800 International Units (IU), of vitamin D daily<\/strong>, depending on age.<\/li>\n
- Discuss taking these or any supplements<\/a> with your healthcare provider for optimal safety.<\/li>\n<\/ul>\n
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process<\/a> to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.<\/p>\n
- \n
- \n
National Institutes of Health. Dietary supplements for immune function and infectious disease<\/a>.<\/p>\n<\/li>\n
- \n
Clayton DJ, Burbeary R, Parker C, et al. Combined turmeric, vitamin C, and vitamin D ready-to-drink supplements reduce upper respiratory illness symptoms and gastrointestinal discomfort in elite male football players<\/a>.\u00a0Nutrients. 2024;16(2):243. Published 2024 Jan 12. doi:10.3390\/nu16020243<\/p>\n<\/li>\n
- \n
Bae M, Kim H. Mini-review on the roles of vitamin C, vitamin D, and selenium in the immune system against COVID-19<\/a>.\u00a0Molecules. 2020;25(22):5346. Published 2020 Nov 16. doi:10.3390\/molecules25225346<\/p>\n<\/li>\n
- \n
He L, Chhantyal K, Chen Z, et al. The association of combined vitamin C and D deficiency with bone mineral density and vertebral fracture<\/a>.\u00a0J Orthop Surg Res. 2024;19(1):460. Published 2024 Aug 2. doi:10.1186\/s13018-024-04953-z<\/p>\n<\/li>\n
- \n
Zhang R, Huang Q, Su G, et al. Association between multiple vitamins and bone mineral density: a cross-sectional and population-based study in the NHANES from 2005 to 2006<\/a>.\u00a0BMC Musculoskelet Disord. 2023;24(1):113. Published 2023 Feb 10. doi:10.1186\/s12891-023-06202-6<\/p>\n<\/li>\n
- \n
Stanescu C, Chiscop I, Mihalache D, et al. The roles of micronutrition and nutraceuticals in enhancing wound healing and tissue regeneration: A systematic review<\/a>.\u00a0Molecules. 2025;30(17):3568. Published 2025 Aug 31. doi:10.3390\/molecules30173568<\/p>\n<\/li>\n
- \n
Mouchel PL, B\u00e9rard E, Tavitian S, et al. Vitamin C and D supplementation in acute myeloid leukemia<\/a>.\u00a0Blood Adv. 2023;7(22):6886-6897. doi:10.1182\/bloodadvances.2023010559<\/p>\n<\/li>\n
- \n
National Institutes of Health. Vitamin C<\/a>.<\/p>\n<\/li>\n
- \n
National Institutes of Health. Vitamin D<\/a>.<\/p>\n<\/li>\n<\/ol>\n
![\"Megan]()
<\/p>\n - \n
- Taking vitamin C and D can help improve your gut health<\/a> and prevent harmful bacteria from entering your digestive tract.<\/li>\n
![\"Megan](\"https:\/\/www.europesays.com\/us\/wp-content\/uploads\/2025\/09\/meganhs11-0550977a84f84b89966cf1799ce2bfb1.jpeg\")
<\/p>\n