Vitamin C: benefits, requirements and food sources

What is Vitamin C (Ascorbic Acid)?

Vitamin C — scientifically called ascorbic acid — is an essential water-soluble vitamin. Unlike most mammals, humans have lost the ability to synthesize it during evolution. Its name "ascorbic" directly refers to scurvy: the severe deficiency disease that decimated sailors before its cause was understood.

Water-soluble means it is not stored in fats — your body eliminates excess daily in urine. This has two important practical consequences: you need to consume it every day, and the risk of toxicity from diet alone is almost zero.

The Scientifically Proven Benefits of Vitamin C

The properties of vitamin C are not a matter of opinion. The EFSA has validated several health claims based on robust clinical studies. Here are the main ones, directly relevant for women aged 40 to 60.

Immune System

Vitamin C supports the normal functioning of the immune system. It promotes the production and mobility of leukocytes (white blood cells), strengthens epithelial barriers against pathogens, and accelerates the resolution of inflammation. This is precisely why needs increase during periods of chronic stress or infection.

Endogenous Collagen Synthesis

Without vitamin C, collagen synthesis is impossible. Ascorbic acid is an essential enzymatic cofactor for prolyl hydroxylase and lysyl hydroxylase — two enzymes that stabilize the collagen triple helix. The concrete result: firmer skin, stronger tendons, healthier gums. To delve deeper into this mechanism, our complete guide to marine collagen during menopause will give you all the keys.

Antioxidant Protection

Vitamin C is one of the most powerful water-soluble antioxidants in the body. It neutralizes free radicals in plasma and cellular fluids, and regenerates oxidized vitamin E — thus creating a synergistic and economical antioxidant defense system.

Non-heme Iron Absorption

Consuming vitamin C at the same time as sources of plant-based iron (legumes, spinach, lentils) multiplies iron absorption by a factor of 2 to 4. A crucial detail for women in perimenopause who sometimes have insufficient iron reserves. Gut flora health also plays a major role in this absorption — our article on probiotics and micronutrient absorption elaborates on this point.

Vitamin C and Menopause: Why Your Needs Change

The menopausal transition is not just about hormones. It is accompanied by an elevation of oxidative stress — an imbalance between the production of free radicals and the body's antioxidant defenses. Vitamin C is at the forefront of these defenses.

Oxidative Stress and Estrogen Decline

Estrogens have their own antioxidant action on cell membranes. Their progressive decline in perimenopause exposes cells to increased oxidation. A study published in the Menopause Journal (2019) showed that markers of systemic oxidative stress are significantly higher in postmenopausal women than in premenopausal women of the same age, highlighting the importance of increasing antioxidant intake during this period.

Fatigue, Brain Fog, and Neurotransmitters

Vitamin C is also involved in the biosynthesis of norepinephrine and the conversion of tryptophan to serotonin. These neurochemical connections partly explain why insufficient intake can worsen chronic fatigue and concentration difficulties so common in perimenopause. If you recognize these symptoms, our complete guide to brain fog in perimenopause will provide you with concrete answers.

Skin and Joint Collagen

The drop in estrogen accelerates collagen degradation — skin can lose up to 30% of its collagen density during the first five years after menopause (Brincat et al., 2005). Maintaining optimal vitamin C intake is therefore a direct lever for preserving skin quality and joint health. For an overview of nutritional strategies after 50, consult our article on essential supplements after 50.

Foods Rich in Vitamin C: The Complete Ranking

Oranges are the popular symbol of vitamin C — but they are far from the best source. Here is a ranking established from ANSES nutritional data (Table Ciqual 2020), expressed in mg per 100 g of fresh or raw product.

Supplementation: Liposomal, Acerola, or Synthetic Vitamin C?

When diet alone is not enough — chronic stress, menopause, unbalanced diet, smoking — supplementation becomes relevant. But not all forms are equal in terms of bioavailability and tolerance.

Liposomal Vitamin C — the Most Bioavailable

Liposomal vitamin C is encapsulated in lipid vesicles (liposomes) that mimic cell membranes. This technology significantly improves absorption: a study published in Nutrients (2016) measured plasma concentrations 1.77 times higher compared to the standard form at an equivalent dose. This is the most recommended form for people with a weakened digestive lining or high needs.

Acerola Vitamin C — the Natural Source

Acerola (Malpighia emarginata) is a tropical cherry naturally extraordinarily rich in ascorbic acid. Acerola vitamin C is accompanied by bioflavonoids and anthocyanins that potentiate its antioxidant action. It is ideal for people who prefer natural sources over chemical synthesis, with excellent digestive tolerance.

Synthetic Ascorbic Acid — Effective and Economical

Molecularly identical to natural vitamin C, synthetic ascorbic acid is the most economical and clinically well-documented form. Differences in bioavailability with natural forms are minimal for standard doses (≤200 mg per dose). It is a solid, well-tolerated, and accessible option.

Signs You Might Benefit from Vitamin C Supplementation

Subclinical vitamin C deficiency is silent — it doesn't cause scurvy, but it gradually erodes your vitality, immunity, and skin quality. Here are the signs to watch out for, especially common from age 45.