Niacinamide
1.
Is it safe to take Niacinamide while on hormone therapy for breast cancer? Do they interact with each other?
2.
I purchased Melatonin 1mg, but I didn't notice that it also contains Niacinamide 100mg, B6 5mg, and magnesium citrate 40mg.
Will this exceed the daily intake limits?
3.
I found that Niacinamide can affect blood sugar and liver function, but I'm unsure what the dosage threshold is for these effects.
What is the intake level that has been tested?
Angel, 50~59 year old female. Ask Date: 2022/06/27
Dr. Huang Shenggang reply Pharmacology
Hello Angel: First, thank you for your question.
1.
After checking, it is confirmed that breast cancer patients taking anti-hormonal medications can also take Niacinamide.
Is there any interaction between the two? Taking Tamoxifen, a common anti-hormonal medication, as an example, there are no significant interactions reported between Tamoxifen and Niacinamide.
2.
The recommended oral dosage of Niacinamide is 300-500 mg/day, so taking 100 mg of Niacinamide will not exceed the daily intake limit.
3.
It has been found that the minimum toxic dose of Niacinamide has not been established.
However, there was a case of a female athlete who developed acute liver failure three days after ingesting a single dose of 20,000 mg of Niacin.
She required an emergency liver transplant.
Additionally, high doses of Niacin can lead to glucose intolerance and an increase in blood sugar levels.
Reply Date: 2022/06/27
More Info
Niacinamide, also known as nicotinamide, is a form of vitamin B3 that has garnered attention for its various health benefits, including its potential role in skin care, metabolic processes, and even cancer treatment. In addressing your questions, we will explore the interactions of Niacinamide with hormone therapy, its daily intake limits, and its effects on blood sugar and liver health.
1. Niacinamide and Hormone Therapy for Breast Cancer:
When it comes to breast cancer patients undergoing hormone therapy, such as with Tamoxifen, the interaction with Niacinamide appears to be minimal. Research indicates that there are no significant interactions between Tamoxifen and Niacinamide, meaning that taking Niacinamide while on hormone therapy should not adversely affect the efficacy of the treatment. However, it is always prudent for patients to consult with their healthcare provider before adding any supplements to their regimen, as individual health conditions and treatment plans can vary widely.
2. Daily Intake of Niacinamide in Combination with Melatonin:
The combination of Melatonin with Niacinamide and other ingredients like Vitamin B6 and magnesium citrate raises concerns about exceeding recommended daily allowances. The typical oral dosage of Niacinamide ranges from 300 to 500 mg per day, and the 100 mg present in your Melatonin supplement is well within this limit. Therefore, you should not exceed the daily intake of Niacinamide with this combination. However, it is essential to consider the cumulative intake from all sources, including dietary sources and other supplements, to ensure you remain within safe limits.
3. Effects of Niacinamide on Blood Sugar and Liver Health:
Niacinamide has been studied for its effects on glucose metabolism and liver function. While it is generally considered safe, high doses can lead to adverse effects. The toxicity threshold for Niacinamide is not definitively established, but anecdotal evidence suggests that doses exceeding 20,000 mg can lead to severe complications, including acute liver failure. For blood sugar regulation, high doses of Niacinamide may impair glucose tolerance, leading to elevated blood sugar levels. It is crucial to monitor intake and consult with a healthcare provider, especially for individuals with pre-existing conditions such as diabetes or liver disease.
In summary, Niacinamide appears to be a safe supplement for individuals undergoing hormone therapy for breast cancer, with no significant interactions reported. The amount found in your Melatonin supplement is within safe limits, and while Niacinamide can influence blood sugar and liver health, adverse effects are typically associated with very high doses. Always consult with a healthcare professional before making changes to your supplement regimen, especially when managing complex health conditions.
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