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NOW Supplements Vitamin C Crystals
SCIENTIFIC SCORE
Likely Very Effective
Based on 5 Researches
9
USERS' SCORE
Good
Based on 1 Review
8.6
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

9.5
Vitamin C reverses pulmonary hypertension
Reversible severe pulmonary hypertension related to scurvy in children.
Highlights significant dietary impacts
We explored the intriguing connection between vitamin C deficiency and severe pulmonary hypertension (PH) in children. Our investigation focused on two young boys who experienced debilitating episodes of hypertension linked to their restrictive diets and scurvy.

In the first case, a 2-year-old faced symptoms like vomiting and hypotension. Despite initial treatment, he developed serious health complications, leading to a diagnosis of transient PH revealed through echocardiogram results. Upon discovering his low vitamin C levels, we treated him with vitamin C and observed a remarkable reversal of his hypertension.

The second case involved a 6-year-old boy who presented with acute breathing difficulties and joint swelling. Similarly, after confirming undetectable vitamin C levels, we started his treatment with vitamin C, which also led to rapid improvements in his pulmonary hypertension.

These findings emphasize that PH in children can arise from nutritional deficiencies like scurvy. It also highlights the importance of correctly diagnosing and treating these conditions, as vitamin C can effectively reverse hypertension associated with scurvy. Our report underscores the necessity of considering dietary factors in pulmonary hypertension cases and challenges us to look closely at patients' nutritional intake.
Read More
9.5
Vitamin C's role in heart failure
An Unusual Etiology of Severe Right Heart Failure Deserving of Wider Recognition.
Significant case study observed
We explored a fascinating case of a previously healthy 31-year-old man experiencing severe right heart failure that stemmed from an unusual source: scurvy, resulting from a vitamin C deficiency. Initially, he presented with worsening shortness of breath and a petechial rash, which raised concerns. Our investigation included echocardiography, revealing severe right-sided heart failure and signs of pulmonary hypertension.

After a thorough work-up, the diagnosis of scurvy was confirmed, and we observed remarkable improvement shortly after starting vitamin C supplementation. This case highlights the potential impact of vitamin C on heart health, particularly in cases where deficiencies lead to serious conditions.

It’s an important reminder that maintaining adequate vitamin levels can have significant health implications, including for those dealing with heart-related issues. These findings make a compelling case for broader recognition of vitamin C's vital role.
Read More
9
Vitamin C's impact on hypertension
Vitamin C deficiency can lead to pulmonary hypertension: a systematic review of case reports.
Focus on deficiency and treatment
We delved into a systematic review of case reports to understand how vitamin C deficiency might affect pulmonary hypertension, particularly highlighting its role in heart failure associated with scurvy. By analyzing reports found in major databases like Pubmed and Scopus, we focused on studies where low vitamin C levels were linked to elevated blood pressure in the lungs, measured via echocardiography or catheterization.

Our findings revealed 32 reported cases, with a striking majority indicating severe vitamin C deficiency. Notably, 24 of the 27 tested patients had undetectable plasma vitamin C levels. Symptoms such as breathlessness, swelling, and fatigue were prevalent among patients, suggesting a severe impact on their quality of life. When comparing mean pulmonary artery pressures (mPAP) during deficiency versus after vitamin C administration, we noted a significant reduction—from a median of 48 mmHg during deficiency to 20 mmHg following treatment.

This evidence implies that correcting vitamin C deficiency could provide meaningful benefits for those suffering from pulmonary hypertension. Given the identified correlation, measuring vitamin C levels in patients with hypertension and exploring treatment effects seems like a wise approach, potentially shedding light on better management strategies.
Read More

Most Useful Reviews

9.5
Pressure normalised
I have been taking it for two months. I struggled to manage my hypertension, but now my blood pressure is 120/80.
Read More

Medical Researches

SCIENTIFIC SCORE
Likely Very Effective
Based on 5 Researches
9
  • All Researches
9.5
Vitamin C's role in heart failure
An Unusual Etiology of Severe Right Heart Failure Deserving of Wider Recognition.
Significant case study observed
We explored a fascinating case of a previously healthy 31-year-old man experiencing severe right heart failure that stemmed from an unusual source: scurvy, resulting from a vitamin C deficiency. Initially, he presented with worsening shortness of breath and a petechial rash, which raised concerns. Our investigation included echocardiography, revealing severe right-sided heart failure and signs of pulmonary hypertension.

After a thorough work-up, the diagnosis of scurvy was confirmed, and we observed remarkable improvement shortly after starting vitamin C supplementation. This case highlights the potential impact of vitamin C on heart health, particularly in cases where deficiencies lead to serious conditions.

It’s an important reminder that maintaining adequate vitamin levels can have significant health implications, including for those dealing with heart-related issues. These findings make a compelling case for broader recognition of vitamin C's vital role.
Read More
9.5
Vitamin C reverses pulmonary hypertension
Reversible severe pulmonary hypertension related to scurvy in children.
Highlights significant dietary impacts
We explored the intriguing connection between vitamin C deficiency and severe pulmonary hypertension (PH) in children. Our investigation focused on two young boys who experienced debilitating episodes of hypertension linked to their restrictive diets and scurvy.

In the first case, a 2-year-old faced symptoms like vomiting and hypotension. Despite initial treatment, he developed serious health complications, leading to a diagnosis of transient PH revealed through echocardiogram results. Upon discovering his low vitamin C levels, we treated him with vitamin C and observed a remarkable reversal of his hypertension.

The second case involved a 6-year-old boy who presented with acute breathing difficulties and joint swelling. Similarly, after confirming undetectable vitamin C levels, we started his treatment with vitamin C, which also led to rapid improvements in his pulmonary hypertension.

These findings emphasize that PH in children can arise from nutritional deficiencies like scurvy. It also highlights the importance of correctly diagnosing and treating these conditions, as vitamin C can effectively reverse hypertension associated with scurvy. Our report underscores the necessity of considering dietary factors in pulmonary hypertension cases and challenges us to look closely at patients' nutritional intake.
Read More
9
Vitamin C reduces hypertension risk
Effect of vitamin C and hawthorn beverage formula on blood pressure and oxidative stress in heat-exposed workers: a cluster-randomized controlled trial.
Study relevant to vitamin C efficacy
We conducted a study to understand how supplementation with vitamin C and a hawthorn beverage could influence blood pressure among workers exposed to heat. Over a period of 40 days, we organized four teams of heat-exposed workers into two groups: one received a daily treatment of vitamin C (130 mg) along with a 500 mL hawthorn beverage, while the other group drank slightly salted water. Both groups also received guidance on maintaining a healthy diet.

Our findings were quite promising. The group that took vitamin C and the hawthorn beverage experienced notable reductions in both systolic and diastolic blood pressure, showing a decrease of about 7.41 mmHg and 7.93 mmHg, respectively. Participants with higher blood pressure saw even more significant drops, underscoring the potential effectiveness of these supplements in supporting cardiovascular health, particularly in challenging environments like heat exposure.

Overall, the results suggest that adding vitamin C and flavonoid-rich beverages to the diets of heat-exposed workers might help lower blood pressure and combat oxidative stress. This could be an essential step in managing hypertension in those at risk due to their working conditions.
Read More
9
Vitamin C's impact on hypertension
Vitamin C deficiency can lead to pulmonary hypertension: a systematic review of case reports.
Focus on deficiency and treatment
We delved into a systematic review of case reports to understand how vitamin C deficiency might affect pulmonary hypertension, particularly highlighting its role in heart failure associated with scurvy. By analyzing reports found in major databases like Pubmed and Scopus, we focused on studies where low vitamin C levels were linked to elevated blood pressure in the lungs, measured via echocardiography or catheterization.

Our findings revealed 32 reported cases, with a striking majority indicating severe vitamin C deficiency. Notably, 24 of the 27 tested patients had undetectable plasma vitamin C levels. Symptoms such as breathlessness, swelling, and fatigue were prevalent among patients, suggesting a severe impact on their quality of life. When comparing mean pulmonary artery pressures (mPAP) during deficiency versus after vitamin C administration, we noted a significant reduction—from a median of 48 mmHg during deficiency to 20 mmHg following treatment.

This evidence implies that correcting vitamin C deficiency could provide meaningful benefits for those suffering from pulmonary hypertension. Given the identified correlation, measuring vitamin C levels in patients with hypertension and exploring treatment effects seems like a wise approach, potentially shedding light on better management strategies.
Read More
8
Vitamin C's impact on hypertension
Association between homocysteine and blood pressure in the NHANES 2003-2006: the mediating role of Vitamin C.
Study highlights Vitamin C importance
We explored the relationship between Vitamin C, homocysteine levels, and blood pressure using data from 7,327 participants in the NHANES 2003-2006 study. Our objective was to understand how Vitamin C might mediate the connection between homocysteine and blood pressure.

In our analysis, we looked closely at systolic and diastolic blood pressure alongside homocysteine and Vitamin C levels. The findings suggested that while Vitamin C had an isolated effect, it played an intricate role in influencing blood pressure through its relationship with homocysteine.

Importantly, we found that individuals with hypertension should pay attention to not only their homocysteine levels but also how much Vitamin C they are getting. This could guide strategies for supplementation and managing blood pressure more effectively.
Read More

User Reviews

USERS' SCORE
Good
Based on 1 Review
8.6
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9.5
Pressure normalised
I have been taking it for two months. I struggled to manage my hypertension, but now my blood pressure is 120/80.
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