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NOW Supplements Vitamin C Crystals
SCIENTIFIC SCORE
Questionable
Based on 2 Researches
6.5
USERS' SCORE
Medium or Average
Based on 22 Reviews
6.6
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 improves diarrheic calf health
Does vitamin C supplementation in milk improve growth and health of diarrheic calves?
High relevance to diarrhea treatment
We investigated how adding vitamin C to milk influences the growth and health of young calves, particularly those experiencing diarrhea. The study involved 48 Holstein calves, which were sorted into two groups based on their health status: healthy calves and those with diarrhea. Each calf was fed the same amount of pasteurized milk and monitored until they reached 74 days of age.

Calves that received vitamin C showed an impressive increase in weight by weaning—74.3 kg compared to 72.2 kg for those without vitamin C. Additionally, calves treated with vitamin C demonstrated improved blood antioxidant levels, suggesting better overall health. Notably, calves suffering from diarrhea benefitted significantly from the vitamin C, needing fewer days of medication for treatment compared to those who did not receive the supplement.

The research highlights that vitamin C can play a critical role in supporting the health of calves during episodes of diarrhea. This is especially relevant for those that faced even mild cases early in life, as they seemed to gain the most benefits from the supplementation. Overall, it appears that vitamin C can positively impact both growth and health in calves suffering from diarrhea.
Read More
4
Ranitidine outperforms probiotics
A short course of oral ranitidine as a novel treatment for toddler's diarrhea: a parallel-group randomized controlled trial.
Combination treatment complicates analysis
We explored the effectiveness of a short course of oral ranitidine compared to probiotics in treating toddler's diarrhea. In a carefully designed trial, 40 participants were randomly assigned to three groups: those receiving ranitidine, those taking probiotics with vitamin C, and a placebo group.

Our main focus was to see if any of these options could reduce the frequency of stools and improve their consistency after ten days of treatment. While the results showed that oral ranitidine outperformed probiotics in managing toddler's diarrhea, the role of vitamin C was less clear.

It's important to highlight that in this study, the probiotics were combined with vitamin C, making it difficult to isolate its individual effects on diarrhea. Overall, we found that ranitidine was more effective than the probiotics, but we can't confidently say how vitamin C contributed to the outcomes. We recommend further studies to investigate these treatments in more detail.
Read More

Most Useful Reviews

3.8
Warning about acidity
Initially, one may experience diarrhoea. It is crucial to be cautious due to its strong acidity.
Read More
8.8
Essential vitamin intake
I've been using vitamin C megadoses for ten years. As it's made in England, I trust its quality. I've tried various brands, but this offers the best cost performance. While the basic effect is 10g, I started with 3g after meals, increasing as tolerated. I find my body needs it, especially when I feel unwell. If taken correctly, there are no issues, including diarrhea.
Read More
8.8
Dental precautions advised
I take care to avoid dissolving it on my teeth, so I take 2-3g in a wafer and swallow it. It’s better to consume 10g daily, ideally several times, especially during colds. I notice that when I take it with a sore throat, it doesn’t worsen, and the symptoms vanish quickly. Diarrhea can occur if taken too much, but I find the powder type effective and economical.
Read More

Medical Researches

SCIENTIFIC SCORE
Questionable
Based on 2 Researches
6.5
  • All Researches
9
Vitamin C improves diarrheic calf health
Does vitamin C supplementation in milk improve growth and health of diarrheic calves?
High relevance to diarrhea treatment
We investigated how adding vitamin C to milk influences the growth and health of young calves, particularly those experiencing diarrhea. The study involved 48 Holstein calves, which were sorted into two groups based on their health status: healthy calves and those with diarrhea. Each calf was fed the same amount of pasteurized milk and monitored until they reached 74 days of age.

Calves that received vitamin C showed an impressive increase in weight by weaning—74.3 kg compared to 72.2 kg for those without vitamin C. Additionally, calves treated with vitamin C demonstrated improved blood antioxidant levels, suggesting better overall health. Notably, calves suffering from diarrhea benefitted significantly from the vitamin C, needing fewer days of medication for treatment compared to those who did not receive the supplement.

The research highlights that vitamin C can play a critical role in supporting the health of calves during episodes of diarrhea. This is especially relevant for those that faced even mild cases early in life, as they seemed to gain the most benefits from the supplementation. Overall, it appears that vitamin C can positively impact both growth and health in calves suffering from diarrhea.
Read More
4
Ranitidine outperforms probiotics
A short course of oral ranitidine as a novel treatment for toddler's diarrhea: a parallel-group randomized controlled trial.
Combination treatment complicates analysis
We explored the effectiveness of a short course of oral ranitidine compared to probiotics in treating toddler's diarrhea. In a carefully designed trial, 40 participants were randomly assigned to three groups: those receiving ranitidine, those taking probiotics with vitamin C, and a placebo group.

Our main focus was to see if any of these options could reduce the frequency of stools and improve their consistency after ten days of treatment. While the results showed that oral ranitidine outperformed probiotics in managing toddler's diarrhea, the role of vitamin C was less clear.

It's important to highlight that in this study, the probiotics were combined with vitamin C, making it difficult to isolate its individual effects on diarrhea. Overall, we found that ranitidine was more effective than the probiotics, but we can't confidently say how vitamin C contributed to the outcomes. We recommend further studies to investigate these treatments in more detail.
Read More

User Reviews

USERS' SCORE
Medium or Average
Based on 22 Reviews
6.6
  • All Reviews
  • Positive Reviews
  • Negative Reviews
3.8
Warning about acidity
Initially, one may experience diarrhoea. It is crucial to be cautious due to its strong acidity.
8.8
Essential vitamin intake
I've been using vitamin C megadoses for ten years. As it's made in England, I trust its quality. I've tried various brands, but this offers the best cost performance. While the basic effect is 10g, I started with 3g after meals, increasing as tolerated. I find my body needs it, especially when I feel unwell. If taken correctly, there are no issues, including diarrhea.
Read More
8.8
Dental precautions advised
I take care to avoid dissolving it on my teeth, so I take 2-3g in a wafer and swallow it. It’s better to consume 10g daily, ideally several times, especially during colds. I notice that when I take it with a sore throat, it doesn’t worsen, and the symptoms vanish quickly. Diarrhea can occur if taken too much, but I find the powder type effective and economical.
Read More
9.5
Highly energising drink
This vitamin C powder complements my daily detox regimen with R-glutathione and R-lipoic acid. It’s cost-effective and crucial for my immune system, especially during times of illness. The only side effect I’ve experienced is diarrhea, which indicates effective digestion. I mix it with water, and find it pleasant to drink.
Read More
3
Changed to powder
Though sour, it's good. After trying 6 grams of mega doses with tablets, I found pure vitamin C powder better. Drinking plenty of water with it helped my discomfort and diarrhoea, and I’m planning to buy a larger quantity soon.
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