Natrol Vitamin D3
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Supplement Facts
Serving Size: 1 Tablet
Amount Per Serving
%DV
Vitamin D3  (as Cholecalciferol)
50 mcg (2,000 IU)
250%

The product is found useful for the following medical conditions

Cold details

SCIENTIFIC SCORE
Possibly Effective
Based on 8 Researches
7.3
USERS' SCORE
Good
Based on 3 Reviews
8.5
8
Vitamin D reduces cold severity
Influence of Vitamin D Supplementation by Simulated Sunlight or Oral D3 on Respiratory Infection during Military Training.
Most Relevant Research
We explored the connection between vitamin D levels and upper respiratory tract infections (URTIs) among military recruits during their training. This observation spanned across different seasons and included over 1,600 recruits. Our aim was to understand how achieving sufficient vitamin D levels could potentially impact the frequency and severity of colds among physically active individuals.

In an additional phase of the research, we conducted a randomized controlled trial with 250 male recruits. They received either a placebo, simulated sunlight exposure, or oral vitamin D3 supplements during winter. This comparison allowed us to see if these methods effectively increased vitamin D levels to a sufficient status of 25(OH)D at 50 nmol/L or higher.

Notably, our findings showed that only 21% of recruits had adequate vitamin D during winter, yet those who did were 40% less likely to suffer from URTIs. Furthermore, both vitamin D supplementation strategies similarly helped nearly all participants achieve sufficient levels. Vitamin D supplementation notably reduced the severity of URTI symptoms by 15% and the number of days with URTIs by 36% compared to placebo.

While the supplementation strategies did not significantly alter other immune factors, such as salivary secretory immunoglobulin A, the overall reduction in respiratory infections indicates a beneficial effect of maintaining vitamin D sufficiency during military training.
9.5
No colds experienced
Most Useful Review
This is my child's favourite D3 variant: strawberry flavour in a small, easy-to-chew tablet. I've purchased it multiple times and will continue to do so. When taken daily through fall, winter and spring, in addition to multivitamins, it yields excellent results - I can't recall the last time my child had a cold.

Bone Pain details

SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8.7
USERS' SCORE
Good
Based on 9 Reviews
8.4
9
Vitamin D3 correction improves pain
Role of Pre-operative Correction of Vitamin D3 Deficiency in Controlling Post-operative Bone Pain after Unicompartmental Knee Arthroplasty.
Most Relevant Research
We explored the impact of vitamin D3 levels on bone pain that patients experience after undergoing unicompartmental knee arthroplasty (UKA). The study involved 240 participants who were divided into three groups based on their vitamin D status—some received treatment before surgery, some after, and others had normal levels to begin with.

By administering vitamin D3 in three doses, we aimed to see if correcting deficiencies could alleviate post-operative bone pain. Throughout the recovery period, we measured pain levels using the visual analog scale at various intervals after the surgery.

Our findings clearly demonstrated that patients who corrected their vitamin D3 deficiency before surgery reported significantly better pain control after the operation compared to those who were treated afterwards or those who started with adequate levels. This highlights the importance of testing and addressing vitamin D status prior to orthopedic procedures, showing that it is a modifiable risk factor affecting recovery.
9.5
Pain relief noted
Most Useful Review
Chic vitamin D. It has a delightful taste and excellent dosage. After two weeks, my child's Vitamin D level increased to 9 units, the bone pain in his legs disappeared, and he no longer complaints of fatigue or headache. This is a commendable result. We'll continue the course, have tests, and update the review. Vitamin D is crucial for calcium integration into bones, making it essential for our health. If you found this review helpful, please give it a thumbs up and stay healthy!
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