Vitamin C Powder & Time Release Tablets | Guide

Name: Vitamin C (1000 mg, Time Release)
Brand: Nature's Sunshine
SKU: 3240
Price: 35.70 USD
Availability: InStock
Rating: 4.8 (5 reviews)

Explore our deep-dive guide on Vitamin C powder and time release Vitamin C with Rose hips, acerola, Rutin, and bioflavonoids for immune and antioxidant support.

Overview

What Is Vitamin C Powder and Why Does It Matter?

When most people think of Vitamin C powder, they're looking for a convenient, effective way to get this essential nutrient into their daily routine. Vitamin C (ascorbic acid) is a water-soluble nutrient the body cannot produce on its own — we lack the enzyme L-gulonolactone oxidase needed for synthesis. That means every milligram must come from food or supplementation.

Nature's Sunshine Vitamin C Time Release takes a thoughtful approach to delivery. Each tablet includes a special coating that slows absorption until the nutrients reach the intestines, helping your body receive the benefits of Vitamin C throughout the day rather than in a single surge. This matters because research shows that at doses above 1 g per day, absorption can fall to roughly 50% or less — so steady, time-released delivery may help your body use more of what you take.

This completely natural formula contains no sugar, starch, artificial colorings, or flavorings. It blends ascorbic acid with a base of Rose hips extract, acerola extract, Rutin, Lemon bioflavonoids, and Hesperidin complex — a combination designed to support the immune system, fight free radicals, nourish the tissues, and assist in collagen production. It is both vegan and non-GMO.

How It Works

Time-Release Delivery and Bioflavonoid Synergy

One of the challenges with standard Vitamin C powder or regular Vitamin C tablets is that your body absorbs the nutrient quickly and excretes what it can't use. At typical dietary intakes of 30–180 mg per day, the body absorbs 70–90% of the Vitamin C consumed. But at higher supplemental doses, absorption efficiency drops significantly. The time-release format in this formula addresses that by metering the release of nutrients over a longer period.

Equally important is the bioflavonoid base. Rose hips, acerola, Rutin, Lemon bioflavonoids, and Hesperidin are not fillers — they are plant-derived compounds with their own documented biological activity. Research suggests that bioflavonoids like Rutin and Hesperidin support vascular health, provide additional antioxidant protection, and may complement Vitamin C's action in the body.

Vitamin C functions as both a direct antioxidant — scavenging reactive oxygen species in aqueous cellular environments — and an enzymatic cofactor. It is required for the hydroxylation of collagen precursors, the synthesis of carnitine and catecholamines, and the enhancement of iron absorption from plant-based foods. It also helps regenerate the antioxidant form of vitamin E, extending the body's overall antioxidant network.

What's inside

Key Ingredients

Vitamin C (ascorbic acid) — 1,000 mg

Vitamin C is a water-soluble antioxidant and essential cofactor involved in collagen biosynthesis, carnitine metabolism, neurotransmitter production, and iron absorption. Research demonstrates that it contributes to immune defense by supporting both innate and adaptive immunity — it helps maintain epithelial barrier function, enhances the differentiation and proliferation of B cells and T cells, promotes phagocytosis, and normalizes cytokine production. A large Cochrane review of 29 trials involving over 11,000 participants found that regular Vitamin C supplementation does not prevent colds in the general population but modestly reduces cold duration by approximately 8% in adults and 14% in children. The benefits appear more pronounced in people under severe physical stress, such as marathon runners. As an antioxidant, Vitamin C directly scavenges reactive oxygen species in plasma and cellular compartments and regenerates the antioxidant form of vitamin E. It is also essential for proper collagen folding and deposition — the protein most abundant in the human body — supporting skin integrity, wound healing, and connective tissue health. Studies suggest Vitamin C may support bronchial health, with supplementation at 400 mg per day or more showing improved lung function measures in patients with chronic obstructive pulmonary disease. Additionally, research links adequate Vitamin C status to reduced duration and severity of upper respiratory infections, pneumonia, and seasonal respiratory challenges.

Rose hips — 25 mg

Rose hips are the pseudo fruits of Rosa canina, one of the richest natural plant sources of Vitamin C, with reported content ranging from 40 to 1,300 mg per 100 g depending on variety and processing. Beyond Vitamin C, Rose hips contain polyphenols, carotenoids (lycopene, beta-carotene), tocopherols, flavonoids, galactolipids, and organic acids. Rose hip extract ranks among the highest measured antioxidant activities of tested fruits. Research suggests that the galactolipid GOPO found in rose hip seeds may help support joint comfort, and clinical studies have confirmed increased antioxidant status in healthy adults following supplementation. Rose hips have a long tradition of use in European and Scandinavian folk medicine for cold-season immune support, and meta-analyses of their Vitamin C content's pharmacological effects show an 8–14% reduction in cold duration in adults. Historically, Rose hips were also used as a febrifuge and recovery tonic after illness in European and Asian herbal traditions.

Acerola fruit extract — 25 mg

Acerola (related to the Cherry family) is valued as a concentrated source of anthocyanins and other polyphenolic compounds with documented antioxidant capacity. Research shows that tart Cherry anthocyanins upregulate endogenous antioxidant pathways, including Nrf2/ARE, and human trials demonstrate increased DNA repair enzyme activity and reduced oxidative stress markers following supplementation. Studies suggest these anthocyanins modulate immune-inflammatory signaling by inhibiting COX-1/2 and NF-κB, reducing TNF-α, IL-1β, and IL-6 in human studies — reflecting immune system modulation. Randomized controlled trials in older adults also show tart Cherry polyphenols reducing systemic inflammation (CRP), oxidative stress, and LDL cholesterol, supporting a role in healthy aging.

Rutin — 25 mg

Rutin (quercetin-3-O-rutinoside) is a flavonoid glycoside found in buckwheat, citrus fruits, and many plants, historically known as 'vitamin P.' It is a documented antioxidant that works through multiple mechanisms: direct free-radical scavenging, upregulation of endogenous antioxidant enzymes (SOD, catalase, glutathione peroxidase), and activation of the Nrf2/ARE pathway. Research suggests Rutin supports vascular health by strengthening capillary walls, reducing their permeability and fragility, and improving endothelial function through increased nitric oxide production. It modulates multiple arms of immunity — suppressing pro-inflammatory cytokine production, inhibiting mast cell activation relevant to allergic immunity, and exerting NF-κB-dependent immunomodulatory effects. Rutin has also been studied for its potential role in cognitive health, with preclinical evidence showing anti-inflammatory and anti-amyloid mechanisms relevant to age-related cognitive decline.

Hesperidin bioflavonoid extract — 25 mg

Hesperidin is a flavanone glycoside predominantly found in citrus fruits, particularly sweet oranges and lemons. Its active metabolite, hesperetin, functions as both an antioxidant — scavenging reactive oxygen species and activating the ERK/Nrf2 signaling pathway — and an anti-inflammatory agent that inhibits NF-κB, iNOS, and COX-2. Multiple meta-analyses of randomized controlled trials suggest that Hesperidin supplementation may help reduce LDL cholesterol, total cholesterol, triglycerides, and inflammatory markers such as TNF-α and C-reactive protein. Research also indicates Hesperidin modulates the immune system by downregulating pro-inflammatory cytokines and upregulating anti-inflammatory IL-10. Preclinical studies show Hesperidin protects lung tissue from inflammatory injury and supports airway health across multiple respiratory models, though human respiratory trials have not yet been published. A limited number of clinical trials have shown Hesperidin-enriched supplementation may support cerebral blood flow and cognitive function in older adults.

Lemon bioflavonoid extract — 25 mg

Lemon (Citrus × limon) is a well-characterized source of flavonoids — including eriocitrin, Hesperidin, and naringenin — along with Vitamin C, organic acids, and essential oils. Research demonstrates that citrus extract combined with Vitamin C significantly increased lipoprotein oxidation lag time in a double-blind randomized controlled trial, outperforming vitamin E as an antioxidant. Lemon's Vitamin C content supports immune defense against respiratory infections; a Swiss clinical review found Vitamin C intake improved symptoms and shortened the duration of respiratory tract infections including the common cold. Lemon has also been used traditionally across cultures for sore throat relief and fever management, attributed to its antimicrobial properties and Vitamin C content.

Dicalcium phosphate

Dicalcium phosphate is a Calcium salt commonly used as a tableting agent and a source of Calcium and phosphorus. Calcium is the most abundant mineral in the human body, with more than 99% stored in bone as hydroxyapatite. It plays essential roles in muscle contraction, nerve transmission, and cellular signaling. Calcium absorption from supplements is approximately 30% and is enhanced in the presence of vitamin D.

Vitamin C (1000 mg, Time Release)

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Vitamin C (1000 mg, Time Release)

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Who Benefits

Who Is Vitamin C Time Release For?

This formula was designed for adults looking for sustained, whole-day Vitamin C support rather than a single-dose approach. It may be especially relevant for:

People focused on immune health — Vitamin C supports both innate and adaptive immune function. Regular supplementation has been shown in research to modestly reduce the duration of colds, with more pronounced benefits in those under heavy physical stress.
Those concerned about antioxidant defense — Vitamin C is one of the most extensively studied water-soluble antioxidants, scavenging reactive oxygen species and regenerating vitamin E.
Anyone supporting collagen production — Vitamin C is an essential cofactor for collagen synthesis, the most abundant protein in the body, supporting skin integrity, wound healing, and connective tissue health.
People who prefer a natural, plant-based formula — This product is vegan and non-GMO, with no sugar, starch, or artificial additives. The bioflavonoid base of Rose hips, acerola, Rutin, Hesperidin, and Lemon bioflavonoids provides complementary plant compounds.

If you have questions about whether this formula fits your individual needs, our naturopath is available for a free consultation — no appointment pressure, just honest guidance.

Directions

How to Take Vitamin C Time Release

Take one tablet daily with a meal.

Each bottle contains 120 tablets, providing a four-month supply at the recommended serving. Because this is a time-release formula, taking it with food supports the gradual absorption process as the tablet moves through your digestive system.

About the author

Written by Greg Howlett

Greg Howlett

Founder

Greg has spent over a decade helping customers choose the right natural-health products. He personally vets every formula we carry and writes these guides to cut through the marketing noise with practical, experience-based advice.

FAQ

Frequently asked questions

Is this the same as a Vitamin C powder?

This product delivers Vitamin C in a time-release tablet format rather than a loose powder. While many people search for Vitamin C powder, the time-release tablet design is intended to slow nutrient absorption until the ingredients reach the intestines, helping maintain Vitamin C levels throughout the day. Research shows that at doses above 1 g per day, absorption efficiency drops — steady release may help the body utilize more of the Vitamin C consumed.

What makes the bioflavonoid base important?

The formula blends ascorbic acid with Rose hips extract, acerola extract, Rutin, Lemon bioflavonoids, and Hesperidin complex. These are not inert fillers — each is a plant-derived compound with its own documented biological activity. Rose hips are one of the richest natural sources of Vitamin C and antioxidants. Rutin and Hesperidin are flavonoids that research suggests support vascular health and provide additional antioxidant and anti-inflammatory activity. Together, they complement the Vitamin C in the formula.

Can Vitamin C help prevent colds?

A large Cochrane review of 29 trials involving over 11,000 participants found that regular Vitamin C supplementation does not prevent colds in the general population. However, the same body of evidence shows it modestly reduces cold duration — by about 8% in adults and 14% in children — and may reduce severity. The benefits appear more pronounced in people exposed to heavy physical stress, such as marathon runners or military personnel in cold environments.

Is this product vegan and free of artificial ingredients?

Yes. Nature's Sunshine Vitamin C Time Release is vegan and non-GMO. It contains no sugar, starch, artificial colorings, or flavorings — it is a completely natural product.

How does Vitamin C support collagen production?

Vitamin C is an essential cofactor for the prolyl and lysyl hydroxylase enzymes that properly hydroxylate collagen precursors. Without adequate Vitamin C, these enzymes cannot function correctly, leading to structurally defective collagen. This role in collagen biosynthesis is fundamental to skin integrity, wound healing, bone strength, cartilage health, and connective tissue maintenance throughout the body.

Who should I talk to before starting this supplement?

If you have a specific health condition, are pregnant or nursing, take medications (especially blood thinners, statins, or estrogen-containing drugs), or have a history of kidney stones, it's wise to consult a healthcare professional. Our naturopath is available for free consultations and can help you think through whether this formula is appropriate for your situation.

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