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NOW Supplements Vitamin C Crystals
SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8.3
USERS' SCORE
Good
Based on 16 Reviews
8.4
Supplement Facts
Serving Size:  1/4 Level Teaspoon (1.1 g)
Amount Per Serving
%DV
Vitamin C (Ascorbic Acid)
1.1 g (1,100 mg) 
1222% 

Top Medical Research Studies

9
Vitamin C alleviates cold sores
Topical treatment of recurrent mucocutaneous herpes with ascorbic acid-containing solution.
Direct effectiveness evaluation noted
We investigated how an ascorbic acid-based solution could help treat recurrent cold sores, also known as mucocutaneous herpes. This study was carefully designed as a randomized, double-blind, placebo-controlled trial, which helps ensure the results are reliable and trustworthy.

Participants used a strong solution of Ascoxal, rich in vitamin C, applied to their cold sores multiple times on the first day of the outbreak. We monitored various symptoms daily, including the severity of scabs, redness, and blisters, comparing the experiences of those using the vitamin C solution to a placebo group.

Our findings were promising: the active treatment resulted in fewer days with scabbing and less severe symptoms overall. Moreover, those using the vitamin C solution showed reduced persistence of scabs compared to the placebo group, along with a lower frequency of detected herpes virus after treatment.

In conclusion, this brief course of vitamin C treatment appears to have significant clinical benefits against cold sores, opening the door for future research on more extensive and frequent treatment regimes.
Read More
8
Vitamin C shows potential for cold sores
A clinical pilot study of lignin--ascorbic acid combination treatment of herpes simplex virus.
Combination treatment lacks isolation
We conducted a clinical pilot study to evaluate the effects of a combination treatment of lignin—a substance derived from pine cones—mixed with vitamin C on cold sores caused by the herpes simplex virus type 1 (HSV-1). Our study included 48 healthy participants, ranging from 4 to 61 years old, who had active lesions of HSV-1.

Participants received a daily dose of the lignin-ascorbic acid treatment for one month. Notably, those who began the treatment within the first 48 hours after the onset of symptoms did not develop typical cold sore lesions. For others who started later, we observed a shorter duration of cold sores and less severe symptoms compared to their previous outbreaks.

Many participants reported a reduction in both the severity and frequency of their cold sore episodes during treatment. Although the results suggest some benefits of this combination treatment, it’s important to note that vitamin C was part of the blend, making it challenging to evaluate its individual effect on cold sores directly.

Thus, while the combination of lignin and vitamin C appears promising for preventing and treating HSV-1 infection, further studies isolating vitamin C's effects would be helpful to understand its specific role in managing cold sores.
Read More
8
Potential effects on cold sores
The use of water-soluble bioflavonoid-ascorbic acid complex in the treatment of recurrent herpes labialis.
Moderate relevance of findings
We evaluated the effectiveness of a water-soluble complex combining bioflavonoids and ascorbic acid, which is commonly known as vitamin C, for treating cold sores caused by recurrent herpes labialis. The study involved 50 episodes of cold sores, with patients receiving different dosages of the vitamin C and bioflavonoid combination, while others were given a lactose placebo.

The regimen was followed for three days after participants felt the initial symptoms. We noted that the combination appeared to reduce the formation of blisters and helped maintain the integrity of the vesicular membrane. The best results came when treatment started during the early warning signs of an outbreak, leading to symptom relief in an average of about 4.2 days with the lower dosage.

Importantly, throughout the study, no adverse reactions were reported by participants. Although the combination product shows promise, it was difficult to isolate the specific impact of vitamin C alone due to its synergy with bioflavonoids.
Read More

Most Useful Reviews

9.5
Prevention expert
I always keep this product in my medicine cabinet. It has made me forget about lingering colds and sore throats. I take a teaspoon daily for prevention and increase to 3-4 doses when I have cold sores. It helps thin the blood!
Read More
9.5
Highly recommended
This product isn't in tablet form, which can be inconvenient. After taking it, I rarely catch cold sores. It notably alleviates symptoms when I do feel unwell, leaving me feeling more relaxed the next morning. We have since ordered four more!
Read More
9.5
Effective for cold sores
Recently, I've been purchasing this powder consistently due to its better value than capsules. Though a spoon isn't included, I find it indispensable. Vitamin C has worked wonders for my colds and during severe itching from cold sores, hives, joint pain, and allergies. During acute symptoms, I took 1000mg every 10 minutes, and it alleviated my issues within an hour. This is a must-have supplement at home.
Read More

Medical Researches

SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8.3
  • All Researches
9
Vitamin C alleviates cold sores
Topical treatment of recurrent mucocutaneous herpes with ascorbic acid-containing solution.
Direct effectiveness evaluation noted
We investigated how an ascorbic acid-based solution could help treat recurrent cold sores, also known as mucocutaneous herpes. This study was carefully designed as a randomized, double-blind, placebo-controlled trial, which helps ensure the results are reliable and trustworthy.

Participants used a strong solution of Ascoxal, rich in vitamin C, applied to their cold sores multiple times on the first day of the outbreak. We monitored various symptoms daily, including the severity of scabs, redness, and blisters, comparing the experiences of those using the vitamin C solution to a placebo group.

Our findings were promising: the active treatment resulted in fewer days with scabbing and less severe symptoms overall. Moreover, those using the vitamin C solution showed reduced persistence of scabs compared to the placebo group, along with a lower frequency of detected herpes virus after treatment.

In conclusion, this brief course of vitamin C treatment appears to have significant clinical benefits against cold sores, opening the door for future research on more extensive and frequent treatment regimes.
Read More
8
Vitamin C shows potential for cold sores
A clinical pilot study of lignin--ascorbic acid combination treatment of herpes simplex virus.
Combination treatment lacks isolation
We conducted a clinical pilot study to evaluate the effects of a combination treatment of lignin—a substance derived from pine cones—mixed with vitamin C on cold sores caused by the herpes simplex virus type 1 (HSV-1). Our study included 48 healthy participants, ranging from 4 to 61 years old, who had active lesions of HSV-1.

Participants received a daily dose of the lignin-ascorbic acid treatment for one month. Notably, those who began the treatment within the first 48 hours after the onset of symptoms did not develop typical cold sore lesions. For others who started later, we observed a shorter duration of cold sores and less severe symptoms compared to their previous outbreaks.

Many participants reported a reduction in both the severity and frequency of their cold sore episodes during treatment. Although the results suggest some benefits of this combination treatment, it’s important to note that vitamin C was part of the blend, making it challenging to evaluate its individual effect on cold sores directly.

Thus, while the combination of lignin and vitamin C appears promising for preventing and treating HSV-1 infection, further studies isolating vitamin C's effects would be helpful to understand its specific role in managing cold sores.
Read More
8
Potential effects on cold sores
The use of water-soluble bioflavonoid-ascorbic acid complex in the treatment of recurrent herpes labialis.
Moderate relevance of findings
We evaluated the effectiveness of a water-soluble complex combining bioflavonoids and ascorbic acid, which is commonly known as vitamin C, for treating cold sores caused by recurrent herpes labialis. The study involved 50 episodes of cold sores, with patients receiving different dosages of the vitamin C and bioflavonoid combination, while others were given a lactose placebo.

The regimen was followed for three days after participants felt the initial symptoms. We noted that the combination appeared to reduce the formation of blisters and helped maintain the integrity of the vesicular membrane. The best results came when treatment started during the early warning signs of an outbreak, leading to symptom relief in an average of about 4.2 days with the lower dosage.

Importantly, throughout the study, no adverse reactions were reported by participants. Although the combination product shows promise, it was difficult to isolate the specific impact of vitamin C alone due to its synergy with bioflavonoids.
Read More

User Reviews

USERS' SCORE
Good
Based on 16 Reviews
8.4
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9.5
Prevention expert
I always keep this product in my medicine cabinet. It has made me forget about lingering colds and sore throats. I take a teaspoon daily for prevention and increase to 3-4 doses when I have cold sores. It helps thin the blood!
9.5
Highly recommended
This product isn't in tablet form, which can be inconvenient. After taking it, I rarely catch cold sores. It notably alleviates symptoms when I do feel unwell, leaving me feeling more relaxed the next morning. We have since ordered four more!
9.5
Effective for cold sores
Recently, I've been purchasing this powder consistently due to its better value than capsules. Though a spoon isn't included, I find it indispensable. Vitamin C has worked wonders for my colds and during severe itching from cold sores, hives, joint pain, and allergies. During acute symptoms, I took 1000mg every 10 minutes, and it alleviated my issues within an hour. This is a must-have supplement at home.
Read More
8.8
Convenient powder form
Excellent vitamin C quality! I find the powdered form more convenient than capsules for adjusting dosages. For cold sores and colds, I take 1000 mg daily in four doses to ease symptoms and speed recovery. It dissolves quickly in water but has a sour taste.
8.3
Quick relief psoriasis
Highly recommend! The vitamin C crystals suit me perfectly; at the onset of a cold, it provides quick relief and helps prevent further illness. Ascorbic acid has enhanced my immunity significantly. I take it often with zinc and dilute it in water. The downside is its inconvenience at home, but the large jar lasts long. If you find this review helpful, please click YES!
Read More
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