Vitamin C (Ascorbic Acid): What It Is, Dose & Research

[ 01 ] Key Facts

Dose in element3	element3 Rise: 45mg
Form	Ascorbic acid — well-absorbed, bioavailable form
Signs you may need more	Frequent illness, slow wound healing, easy bruising, fatigue, dry or rough skin
Safe range	45mg daily RDI (NZ); upper intake level 2,000mg/day. Higher doses are commonly used during illness. Water-soluble; excess is excreted.

Food sources

Kiwifruit
Capsicum (bell peppers)
Oranges
Broccoli

[ 02 ] Rationale

Why this ingredient is in element3

Vitamin C does more than its reputation suggests. Beyond its antioxidant role, it’s a cofactor in the body’s normal synthesis of steroid hormones — which is one reason the adrenal glands hold among the highest concentrations of vitamin C in the body, and why demand rises when life does.

Collagen synthesis is vitamin C’s most visible role. Vitamin C is required by prolyl hydroxylase and lysyl hydroxylase, the enzymes that stabilise collagen’s triple-helix structure. Without adequate vitamin C, collagen production is impaired at every site in the body: skin loses firmness and elasticity, joints lose cushioning, blood vessel walls become fragile (leading to easy bruising), and wound healing slows. This is not a cosmetic concern alone — collagen constitutes approximately 30% of the body’s total protein.

Vitamin C’s role as an antioxidant extends beyond direct free radical scavenging. It regenerates Vitamin E after it has neutralised a lipid peroxide, effectively recycling the body’s fat-soluble antioxidant defences. It also supports the endogenous glutathione system — complementing Riboflavin’s (B2) role in glutathione recycling. This interconnected antioxidant network is one of the reasons why isolated nutrient supplementation often underperforms: these systems are designed to work together.

Within the element3 Rise formula, vitamin C has a specific synergy with iron. Ascorbic acid converts ferric iron (Fe³⁺) to ferrous iron (Fe²⁺) in the gut, significantly enhancing non-haem iron absorption. This is why both nutrients are included in the morning formula. The zinc in element3 Rest is kept separate from the iron here to avoid absorption competition.

At 45mg, element3 Rise provides the full NZ RDI. This dose supports daily antioxidant, collagen, and adrenal function as part of a comprehensive formula, and can be readily supplemented through dietary vitamin C intake throughout the day.

[ 03 ] At 35+

Relevant at 35+

After 35, vitamin C’s multiple roles converge to become simultaneously more important and more vulnerable. Collagen production naturally declines by approximately 1–1.5% per year from the mid-20s, and this decline accelerates during perimenopause as oestrogen (which stimulates collagen synthesis) fluctuates and falls. Ensuring vitamin C availability for the collagen production that remains is a basic but essential strategy for maintaining skin, joint, and vascular health during this transition.

Sustained stress also draws on vitamin C, since the body uses it in the everyday synthesis of steroid hormones. Keeping intake steady is a simple foundation to hold through this stage.

Immune function also shifts after 35. The innate and adaptive immune systems both decline gradually with age (immunosenescence), and this process is influenced by oxidative status and nutrient availability. Vitamin C supports immune cell function at multiple levels: neutrophil migration, lymphocyte proliferation, and the production of interferons. Research indicates that maintaining adequate vitamin C status supports immune resilience as the body ages.

[ 04 ] Your Questions

Your Questions

What is vitamin C?

Vitamin C, also known as ascorbic acid, is a water-soluble essential nutrient that humans cannot synthesise and must obtain entirely from diet or supplementation. It functions as a potent antioxidant, a cofactor for enzymes involved in collagen synthesis and neurotransmitter production, and a regulator of immune function. Uniquely among vitamins, vitamin C is also a direct participant in adrenal gland function — the adrenal glands contain some of the highest concentrations of vitamin C in the body, using it to synthesise cortisol during the stress response.

What are the benefits of taking vitamin C?

Vitamin C supports immune defence through multiple mechanisms: it enhances the production and function of white blood cells, acts as a direct antioxidant protecting immune cells from oxidative damage, and maintains the integrity of mucosal barriers. It is essential for collagen synthesis — the structural protein of skin, tendons, blood vessels, and bone — making it a key nutrient for skin health and wound healing. Vitamin C also supports non-haem iron absorption and contributes to normal neurotransmitter synthesis.

What are the benefits of vitamin C in the element3 protocol?

In element3 Rise, vitamin C at 45mg provides the NZ RDI for daily immune and antioxidant support, while serving a specific functional role: supporting iron absorption. element3 Rise includes iron (9mg as microencapsulated ferrous fumarate) and vitamin C together in the same morning formula because ascorbic acid converts ferric iron to the more bioavailable ferrous form, meaningfully improving iron uptake.

What is the recommended daily intake of vitamin C?

The recommended dietary intake in New Zealand is 45mg per day for adult women, which is lower than the US RDA of 75mg. element3 Rise provides 45mg per serve, meeting the NZ RDI. The upper intake level is 2,000mg per day; vitamin C is water-soluble and any excess is excreted, with the main side effect of very high doses being digestive discomfort (diarrhoea at doses above 2,000mg). Higher doses (500–1,000mg) are commonly self-administered during illness, and this is safe and widely supported by evidence.

What food provides vitamin C?

Vitamin C is most abundant in kiwifruit (one kiwi provides approximately 80–100mg), capsicum (bell peppers), citrus fruits, strawberries, broccoli, Brussels sprouts, and tomatoes. New Zealand kiwifruit are among the world’s richest food sources per gram. Vitamin C is heat-sensitive and water-soluble — cooking significantly reduces food vitamin C content, and prolonged storage also causes losses. Women who regularly eat fresh fruit and vegetables can meet the 45mg NZ RDI through diet; those with less varied diets may fall short.

Are there any Vitamin C side effects?

Vitamin C is safe and well-tolerated at all doses up to the 2,000mg upper intake level. At the 45mg RDI dose in element3 Rise, no side effects are expected. At very high single doses (above 1,000–2,000mg), some individuals experience digestive discomfort including loose stools — this is the most common side effect and resolves when the dose is reduced. High-dose vitamin C is not recommended for individuals with haemochromatosis (iron overload conditions), as it enhances iron absorption. Kidney stones from vitamin C are theoretically possible at very high doses but are not a risk at standard supplemental amounts.

What are vitamin C deficiency symptoms?

Vitamin C deficiency symptoms range from subtle to severe. Early signs include easy bruising, slow wound healing, dry or rough skin, persistent fatigue, and increased susceptibility to infections. Moderate deficiency causes swollen or bleeding gums, joint pain, and impaired collagen integrity. Severe deficiency is rare in developed countries with access to fresh fruit and vegetables. Subclinical insufficiency is more common and presents as immune vulnerability, skin that heals slowly, and persistent low-grade fatigue.

What form of vitamin C is in the element³ blend?

element3 Rise uses ascorbic acid — the standard, well-absorbed form of vitamin C and the reference compound in all clinical research. It is directly bioavailable without requiring conversion. While alternative forms such as sodium ascorbate (buffered, gentler on the stomach at high doses), ascorbyl palmitate (fat-soluble), and liposomal vitamin C (enhanced bioavailability) exist, ascorbic acid is the appropriate form at the 45mg RDI dose used in element3 Rise, where tolerability is not a concern and the primary goals are daily antioxidant support, iron absorption enhancement, and adrenal function.

How much vitamin C do adults need per day?

The NZ RDI for adult women is 45mg. Many countries set their RDI higher (75–90mg in the US). element3 Rise provides the full 45mg NZ RDI, designed to complement dietary vitamin C from fruits and vegetables. There is no harm in consuming more through diet.

[ 05 ] The Research

1 study

The Research

Study	Key finding	Read
Vitamin C and Immune FunctionCarr, A. C., & Maggini, S. (2017). Vitamin C and immune function. Nutrients, 9(11), 1211. https://doi.org/10.3390/nu9111211	Comprehensive review concluding that adequate vitamin C intake supports innate and adaptive immune cell function and is required for collagen synthesis and antioxidant defence.	Read →

[ 06 ] In the Protocol

Where Vitamin C (as Ascorbic Acid) sits in the element3 Protocol

In element3 Rise (AM Formula), vitamin C at 45mg supports three things: collagen production for skin and structural integrity, normal immune cell activity, and iron absorption. It supports the uptake of the iron taken alongside it, recycles Vitamin E to extend its antioxidant capacity, and supports the glutathione system that Riboflavin helps maintain. The zinc in element3 Rest is kept separate from the iron here to avoid absorption competition.

You can learn more about the full element3 ingredient philosophy at element3.co.nz.

Vitamin C (as Ascorbic Acid)