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NOW Supplements Vitamin A
SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Moderately Good
Based on 10 Reviews
7.7
Supplement Facts
Serving Size: 1 Softgel
Amount Per Serving
%DV
Vitamin A (from Retinyl Palmitate and Fish Liver Oil)
3,000 mcg
333%

Top Medical Research Studies

8
Vitamin A toxicity's impact on headaches
A Rare Case Report of Benign Intracranial Hypertension Caused by Hypervitaminosis A.
Insights on headache and vitamin A
We examined a rare case involving a 13-year-old girl who experienced symptoms of headache and visual disturbances due to benign intracranial hypertension (BIH) related to vitamin A toxicity. This condition was characterized by elevated pressure inside her skull, which led to her experiencing severe headaches, photophobia, and vomiting.

After conducting various tests, including magnetic resonance imaging and a lumbar puncture, we confirmed the diagnosis of BIH. Treatment was initiated with acetazolamide, a medication commonly used to reduce intracranial pressure. Although the study primarily focuses on the condition resulting from vitamin A excess, the use of acetazolamide makes it challenging to isolate the effect of vitamin A on headache relief specifically.

What's particularly noteworthy in this case is the significant elevation of serum vitamin A levels, which aligned with her symptoms. Following treatment, this patient showed a remarkable clinical improvement, including a reduction in papilledema during regular eye check-ups. Within just two weeks after starting treatment, she was discharged symptom-free, highlighting how important it is to consider vitamin A levels in children presenting with similar symptoms.

This case serves as a reminder for clinicians regarding the potential consequences of vitamin A toxicity, especially when evaluating children with headaches correlated to papilledema.
Read More

Most Useful Reviews

8.8
Effective for headaches
I purchased this supplement for my eyes and skin, and it also appears effective for my daily headaches. I find it alleviates headaches stemming from neck stiffness and eye strain. I take one tablet a day and have experienced no side effects, so I plan to continue my regimen.
Read More
10
Dry eyes relieved
The difference in my eye care is astounding! I rarely write reviews, but this product truly deserves acclaim. I initially sought relief for dry eyes, which often led to headaches from prolonged computer use. Since taking this supplement alongside omega-3, I've significantly reduced my need for eye drops, and the headaches have completely ceased. I will definitely continue using this product!
Read More
9.5
Headaches resolved
Good composition, fast delivery, and high-quality packaging. The capsules are slightly large but easy to swallow, with a pleasant citrus taste. I've been taking it for 10 days, and I've noticed marked improvements: my energy has increased, headaches have ceased, and my mood remains excellent. I recommend it, especially for those interested in fitness or adhering to diets.
Read More

Medical Researches

SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
  • All Researches
8
Vitamin A toxicity's impact on headaches
A Rare Case Report of Benign Intracranial Hypertension Caused by Hypervitaminosis A.
Insights on headache and vitamin A
We examined a rare case involving a 13-year-old girl who experienced symptoms of headache and visual disturbances due to benign intracranial hypertension (BIH) related to vitamin A toxicity. This condition was characterized by elevated pressure inside her skull, which led to her experiencing severe headaches, photophobia, and vomiting.

After conducting various tests, including magnetic resonance imaging and a lumbar puncture, we confirmed the diagnosis of BIH. Treatment was initiated with acetazolamide, a medication commonly used to reduce intracranial pressure. Although the study primarily focuses on the condition resulting from vitamin A excess, the use of acetazolamide makes it challenging to isolate the effect of vitamin A on headache relief specifically.

What's particularly noteworthy in this case is the significant elevation of serum vitamin A levels, which aligned with her symptoms. Following treatment, this patient showed a remarkable clinical improvement, including a reduction in papilledema during regular eye check-ups. Within just two weeks after starting treatment, she was discharged symptom-free, highlighting how important it is to consider vitamin A levels in children presenting with similar symptoms.

This case serves as a reminder for clinicians regarding the potential consequences of vitamin A toxicity, especially when evaluating children with headaches correlated to papilledema.
Read More

User Reviews

USERS' SCORE
Moderately Good
Based on 10 Reviews
7.7
  • All Reviews
  • Positive Reviews
  • Negative Reviews
8.8
Effective for headaches
I purchased this supplement for my eyes and skin, and it also appears effective for my daily headaches. I find it alleviates headaches stemming from neck stiffness and eye strain. I take one tablet a day and have experienced no side effects, so I plan to continue my regimen.
10
Dry eyes relieved
The difference in my eye care is astounding! I rarely write reviews, but this product truly deserves acclaim. I initially sought relief for dry eyes, which often led to headaches from prolonged computer use. Since taking this supplement alongside omega-3, I've significantly reduced my need for eye drops, and the headaches have completely ceased. I will definitely continue using this product!
Read More
9.5
Headaches resolved
Good composition, fast delivery, and high-quality packaging. The capsules are slightly large but easy to swallow, with a pleasant citrus taste. I've been taking it for 10 days, and I've noticed marked improvements: my energy has increased, headaches have ceased, and my mood remains excellent. I recommend it, especially for those interested in fitness or adhering to diets.
Read More
10
Headache resolved quickly
I initially experienced a headache when starting this supplement, but it vanished within 2-3 days. I've since adjusted the dosage to two in the morning without any further issues.
8.8
Great for headaches
The quality is superb. The small size is easy to swallow, and there’s no taste. It helps me with my headaches effectively.
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