Page 1 - Reviews - NaturesPlus, Super C Complex, Sustained Release , 60 Tablets - iHerb
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Customer Ratings & Reviews

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4.7
Based on 6,386 ratings
5,222
709
305
87
63
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What customers say
Customers highly praise the Nature's Plus Sustained Release Super C Complex for its excellent quality, high vitamin C content, and sustained release formula, which provides all-day protection with just one tablet. Many users report significant improvements in their immune system and overall well-being, noting fewer instances of colds and flu. The product is also appreciated for its natural ingredients and antioxidant properties. However, a common complaint is the large size of the tablets, making them difficult to swallow for some. Despite this, the supplement is considered effective and valuable by most users.
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Moustafa
Silver
Posted on Jan 11, 2026
Saudi Arabia
193
9
1
21
شكرا
Verified purchase
Vitamin C formula designed for sustained release, so the nutrient is gradually delivered over time instead of all at once. Includes a blend of vitamin C and supportive co‑nutrients, with a clean ingredient profile and minimal fillers. Tablets are easy to take and the large count makes it a good value for daily use. Practical option if you want gentle, extended immune support and antioxidant activity throughout the day.
BlackNova
Gold
Posted on Feb 16, 2026
Thailand
508
0
4
98
Verified purchase
7.0 stars Introduction & context: NaturesPlus Super C Complex, Sustained Release delivers 1,000 mg of vitamin C per tablet—a clinically relevant dose aligning with studies investigating immune function and collagen synthesis. The sustained-release format aims to prolong plasma ascorbate levels, theoretically minimizing urinary excretion. Priced at ~$0.17/tablet, it undergoes NSF third-party testing for purity. However, the proprietary blend obscures exact amounts of bioflavonoids and rose hips. Evidence summary: Two RCTs (n=20–26) show 1,000 mg/day vitamin C reduces cold duration by ~8% in active individuals—modest but consistent. No significant effects on general population immunity. Bioavailability comparisons (ascorbate AUC0-24h) favor liposomal forms over standard tablets, though this product lacks such enhancements. Formulation & quality analysis: Ascorbic acid is the sole active form—bioavailable but prone to degradation. The sustained-release matrix (likely hydroxypropyl methylcellulose) is standard but unproven for superior absorption. Trace contaminants (lead <1 ppm) meet safety thresholds but aren’t ideal for long-term use. Safety & interactions: Generally safe up to 2,000 mg/day; high doses may cause gastrointestinal upset. Caution for renal impairment or iron overload disorders. Minimal interactions, but ascorbate can enhance iron absorption. Value & practicality: Cost-effective for daily immune support. Sustained release may suit those preferring once-daily dosing, though immediate-release alternatives offer similar efficacy at lower prices. Overall verdict + score: Moderate support for immune resilience with practical dosing. Lacks cutting-edge bioavailability features; transparency issues with proprietary blend. Suitable for budget-conscious individuals prioritizing basic ascorbate supplementation. Who it's for: Active adults or those prone to colds seeking affordable immune maintenance. Not ideal for high-dose therapeutic use. I’d opt for liposomal vitamin C if bioavailability were a priority.
iHerbUser1008
Silver
Posted on Nov 17, 2025
Singapore
124
0
0
6
Super C Complex Vitamin
Verified purchase
High-potency sustained-release vitamin C complex from NaturesPlus at 1,000mg per tablet. Enhanced with 500mg bioflavonoids for improved absorption and efficacy. Gentle sustained-release formula provides gradual vitamin C delivery for better tolerance and utilization. Supports immune function, collagen synthesis, and antioxidant protection. Excellent value with 60 tablets for comprehensive vitamin C supplementation.
iHerb customer
Posted on Sep 30, 2025
Saudi Arabia
54
0
0
1
Excellent
Verified purchase
Right from the start, I could tell this product stood out from others I’ve tried. The presentation was neat, the instructions were easy to follow, and the quality felt trustworthy. I especially like how convenient the serving size is — not too much, not too little, just right. After using it daily, I noticed subtle but real changes: better balance throughout the day and a lighter, more energized feeling. It’s simple, effective, and exactly what I was hoping to find.
iHerb customer
Posted on Sep 30, 2025
Saudi Arabia
29
0
0
1
Good
Verified purchase
From the first impression, I could tell this was a high-quality product. The packaging was professional and secure, the product smelled fresh, and the dosage information was very clear. I’ve tried similar items from other brands, but the difference here is noticeable. Not only does it deliver what it promises, but it also feels like it’s made with genuine care. I particularly love that the serving size is practical and lasts longer than expected. After consistent use, I felt a boost in my overall health — more stable energy, better focus, and even an improvement in mood. This is easily a product I’d recommend to friends and family.
iHerb customer
Posted on Sep 30, 2025
Saudi Arabia
69
0
0
2
Excellent
Verified purchase
I’ve been using this product consistently for the past month, and I’m genuinely impressed with the results. The quality feels premium — from the sturdy packaging to the freshness of the product itself. The serving size is generous, and the instructions are clear and easy to follow. What stood out most to me is how natural the ingredients feel; I didn’t experience any discomfort or side effects, which is something I really value. I also noticed a gradual improvement in my energy levels and overall well-being, which makes me confident that this is a product I’ll continue to repurchase.
iHerb customer
Posted on Sep 30, 2025
Saudi Arabia
85
0
0
1
Good
Verified purchase
Right from the start, I could tell this product stood out from others I’ve tried. The presentation was neat, the instructions were easy to follow, and the quality felt trustworthy. I especially like how convenient the serving size is — not too much, not too little, just right. After using it daily, I noticed subtle but real changes: better balance throughout the day and a lighter, more energized feeling. It’s simple, effective, and exactly what I was hoping to find.
iHerb customer
Posted on Sep 30, 2025
Yemen
85
0
0
0
Great
Verified purchase
I was looking for something reliable to add to my daily routine, and this turned out to be exactly what I needed. The formula feels clean and thoughtfully made — no unnecessary extras, just what matters. The container is generous and lasts long enough to make it worth the price. What impressed me most is how easy it is to take; it doesn’t upset the stomach and has no strange aftertaste. After staying consistent, I started noticing steady improvements in my energy and focus. It’s rare to find something that combines quality, effectiveness, and value this well.
iHerb customer
Posted on Sep 24, 2025
Saudi Arabia
85
0
0
0
Awesome
Verified purchase
This product really impressed me with how consistent it is. Every time I use it, I know what to expect — no unpleasant surprises, just steady and reliable quality. The ingredients list is simple and transparent, which I appreciate. I also like how easy it is to take daily without interrupting my schedule. After sticking with it, I feel more balanced throughout the day. It’s not flashy, but it gets the job done in the best way possible.
iHerb customer
Posted on Sep 24, 2025
United States
85
0
0
1
Good
Verified purchase
This has quickly become a staple in my daily routine. What impressed me most is the balance between effectiveness and comfort — I get real results without any negative side effects. The product feels pure, with a straightforward ingredient profile that builds trust. The capsules are easy to swallow, and there’s no lingering taste, which makes it effortless to take every day. Over time, I’ve noticed improvements not only in my physical energy but also in my overall sense of wellness. The price point is fair considering the quality and the generous amount in the bottle. Honestly, this is one of those products that I’ll keep coming back to because it just works.