{"id":11386131,"date":"2022-09-23T22:41:11","date_gmt":"2022-09-23T20:41:11","guid":{"rendered":"https:\/\/nostylelike.net\/?post_type=product&#038;p=11386131"},"modified":"2026-08-12T06:49:23","modified_gmt":"2026-08-12T03:49:23","slug":"niacin-500-mg-vitamin-b3-for-heart","status":"publish","type":"product","link":"https:\/\/nostylelike.net\/en\/product\/niacin-500-mg-vitamin-b3-for-heart\/","title":{"rendered":"Niacin 500 mg (Vitamin B3) \u2013 NOW Foods, 100 Capsules (High-Dose Supplement)"},"content":{"rendered":"<p><!-- Niacin EN long description - NSL (compliant) --><\/p>\n<h1 id=\"top\">Niacin 500 mg (Vitamin B3) by NOW Foods \u2013 100 Capsules (High-Dose Dietary Supplement)<\/h1>\n<figure>\n  <img decoding=\"async\" src=\"https:\/\/nostylelike.net\/wp-content\/uploads\/2022\/09\/NOW%C2%AE-Niacin-500-mg-100-Veg-Capsules-%D9%85%D8%AF%D8%B9%D9%85-%D8%A8%D9%81%D9%8A%D8%AA%D8%A7%D9%85%D9%8A%D9%86-B21.webp\" alt=\"Niacin vitamin B3 500 mg 100 capsules by NOW Foods a dietary supplement from No Style Like\" \/><br \/>\n<\/figure>\n<div style=\"background:#fff7ed;border:1px solid #fed7aa;border-radius:12px;padding:14px 16px;margin:14px 0;\">\n  <strong>Important note before reading:<\/strong> Niacin (vitamin B3) at <strong>500 mg<\/strong> is a <strong>high-dose<\/strong> dietary supplement \u2014 far above the daily requirement (about 14\u201316 mg) and the tolerable upper limit for supplements (35 mg). Niacin has a real role in cellular energy production and affects blood lipids at therapeutic doses, but <strong>large clinical trials (AIM-HIGH and HPS2-THRIVE) did not show that it reduces heart attacks or strokes<\/strong> when added to standard care, and it was linked to side effects. We therefore present it honestly as a dietary supplement, not a proven treatment for heart disease, and this high dose should be used <strong>under a doctor&#8217;s supervision<\/strong>, not as self-treatment.\n<\/div>\n<h2 id=\"key-facts\">Key Facts About Niacin<\/h2>\n<table style=\"border-collapse:collapse;width:100%;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden;\">\n<tbody>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:10px 12px;\"><strong>Name<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">Niacin (Vitamin B3)<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:10px 12px;\"><strong>Brand<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">NOW Foods<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:10px 12px;\"><strong>Strength<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">500 mg per capsule<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:10px 12px;\"><strong>Pack<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">100 capsules<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:10px 12px;\"><strong>Category<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">Dietary supplement (B vitamin)<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:10px 12px;\"><strong>Country of origin<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">USA<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:10px 12px;\"><strong>Expiry<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">03\/2028<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Short Description:<\/strong> Niacin (vitamin B3) 500 mg by NOW Foods, 100 capsules, is a high-dose dietary supplement. Niacin has a role in energy production and affects blood lipids, but large trials did not prove it reduces heart attacks. This high dose is used under medical supervision only, due to effects such as flushing, liver impact and blood-sugar changes. Consult a doctor before use.<\/p>\n<h2 id=\"toc\">Table of Contents<\/h2>\n<ul>\n<li><a href=\"#intro\">Introduction<\/a><\/li>\n<li><a href=\"#what\">What Is Niacin (Vitamin B3)?<\/a><\/li>\n<li><a href=\"#how\">How It Works in the Body<\/a><\/li>\n<li><a href=\"#lipids\">Niacin and Blood Lipids<\/a><\/li>\n<li><a href=\"#evidence\">What the Research Says About the Heart<\/a><\/li>\n<li><a href=\"#howto\">How It Is Used and Dosage<\/a><\/li>\n<li><a href=\"#flush\">Niacin Flushing<\/a><\/li>\n<li><a href=\"#avoid\">Who Should Avoid It or Consult a Doctor?<\/a><\/li>\n<li><a href=\"#safety\">Safety Warnings &amp; Precautions<\/a><\/li>\n<li><a href=\"#interactions\">Drug Interactions<\/a><\/li>\n<li><a href=\"#tests\">Tests &amp; Monitoring<\/a><\/li>\n<li><a href=\"#myths\">Myths vs Facts<\/a><\/li>\n<li><a href=\"#treatment\">Is It a Treatment for Heart Disease?<\/a><\/li>\n<li><a href=\"#doctor\">When to See a Doctor<\/a><\/li>\n<li><a href=\"#expert\">NSL Expert Tip<\/a><\/li>\n<li><a href=\"#faq\">FAQ<\/a><\/li>\n<li><a href=\"#conclusion\">Conclusion<\/a><\/li>\n<\/ul>\n<hr \/>\n<h2 id=\"intro\">Introduction<\/h2>\n<p>Many people look for supplements to support the heart and cholesterol, and <strong>Niacin (vitamin B3)<\/strong> is one of the best known. At <strong>No Style Like<\/strong> we put your health and trust above any marketing, so we present an accurate, honest informational page: what niacin is, how it works, its real effect on blood lipids, what the large trials actually showed about the heart, and why a 500 mg dose must be approached with caution and medical supervision.<\/p>\n<hr \/>\n<h2 id=\"what\">What Is Niacin (Vitamin B3)?<\/h2>\n<p>Niacin is one of the B vitamins (vitamin B3), known scientifically as nicotinic acid. The daily requirement is small (about 14\u201316 mg for adults), and the tolerable upper limit from supplements is 35 mg per day. So <strong>NOW Niacin 500 mg<\/strong> is a <strong>very high dose<\/strong> (about 14 times the usual upper limit) \u2014 a &#8220;therapeutic&#8221; dose normally used under a doctor&#8217;s supervision, not a general daily supplement.<\/p>\n<hr \/>\n<h2 id=\"how\">How It Works in the Body<\/h2>\n<p>Niacin is converted in the body into <strong>NAD<\/strong>, which is involved in more than 400 enzyme reactions and plays a key role in <strong>producing energy<\/strong> from carbohydrates, fats and protein. This is a real nutritional role, but a balanced diet usually covers the daily requirement without high doses.<\/p>\n<hr \/>\n<h2 id=\"lipids\">Niacin and Blood Lipids<\/h2>\n<p>At high therapeutic doses (often 1,500\u20133,000 mg per day), niacin can <strong>raise &#8220;good&#8221; HDL cholesterol and lower &#8220;bad&#8221; LDL cholesterol and triglycerides<\/strong>. This effect on lab numbers is well known \u2014 but, as we will see, improving lipid numbers <strong>does not necessarily mean fewer heart attacks<\/strong>, which is a crucial point.<\/p>\n<hr \/>\n<h2 id=\"evidence\">What the Research Says About the Heart<\/h2>\n<p>For scientific honesty: despite niacin&#8217;s effect on lipid numbers, <strong>large clinical trials did not prove a heart benefit<\/strong>. The <strong>AIM-HIGH<\/strong> study found that adding niacin to statin therapy <strong>did not reduce heart attacks<\/strong> and was linked to a higher stroke risk. The <strong>HPS2-THRIVE<\/strong> trial in more than 25,000 participants showed no meaningful reduction in cardiovascular events despite improved lipids, with more side effects. A 2017 systematic review concluded niacin offers &#8220;little if any&#8221; protection from atherosclerotic heart disease. We therefore make no claim that it &#8220;treats&#8221; the heart.<\/p>\n<hr \/>\n<h2 id=\"howto\">How It Is Used and Dosage<\/h2>\n<p>Because 500 mg is a high dose, we do <strong>not specify a therapeutic regimen here<\/strong>; using it at this dose for lipid management should be <strong>by prescription and under a doctor&#8217;s supervision<\/strong> with monitoring, not as a general daily supplement. Take it as directed by the doctor or the pack, often with food to reduce flushing. Do not start a high dose on your own, especially with chronic conditions or medications.<\/p>\n<hr \/>\n<h2 id=\"flush\">Niacin Flushing<\/h2>\n<p>One of the best-known effects of niacin is <strong>&#8220;flushing&#8221;<\/strong>: redness, warmth and tingling of the skin (especially the face and neck), usually starting at doses above 30\u201350 mg of nicotinic acid and more noticeable at 500 mg. It is usually not dangerous but can be uncomfortable, and may lessen when taken with food and over time. If it comes with severe dizziness, palpitations or unusual symptoms, consult a doctor.<\/p>\n<hr \/>\n<h2 id=\"avoid\">Who Should Avoid It or Consult a Doctor First?<\/h2>\n<p>It is strongly advised to consult a doctor before using high-dose niacin in the following cases: <strong>liver disease<\/strong> or raised liver enzymes; <strong>diabetes or blood-sugar problems<\/strong> (niacin can raise blood glucose); <strong>gout<\/strong> or high uric acid; <strong>stomach ulcer<\/strong>; taking <strong>cholesterol medicines (statins)<\/strong> or chronic medications; pregnancy and breastfeeding; and children. Niacin at 500 mg is not a general supplement for everyone.<\/p>\n<hr \/>\n<h2 id=\"safety\">Safety Warnings &amp; Precautions<\/h2>\n<p>High doses of niacin can cause: <strong>liver stress or damage<\/strong> (especially slow-release forms), raised blood sugar and insulin resistance, gastrointestinal upset (nausea, diarrhoea), higher gout risk, and sometimes effects on vision. So: stick to the dose your doctor sets, do not exceed it, stop use and consult a doctor if you notice yellowing of the skin\/eyes, severe abdominal pain, persistent nausea, high blood sugar or severe flushing, and keep out of the reach of children. At this dose, niacin is closer to a medicine that needs monitoring than a casual supplement.<\/p>\n<hr \/>\n<h2 id=\"interactions\">Drug Interactions<\/h2>\n<p>Niacin may interact with <strong>statins<\/strong> (higher chance of muscle pain\/myopathy), with <strong>diabetes medicines<\/strong> (it can raise blood sugar, so doses may need adjusting), with <strong>blood-pressure medicines<\/strong> (it can add to low blood pressure and flushing), and with some tuberculosis medicines such as isoniazid. Tell the doctor or pharmacist about everything you take before starting it.<\/p>\n<hr \/>\n<h2 id=\"tests\">Tests &amp; Monitoring<\/h2>\n<p>When it is used at high dose under medical supervision, the doctor may monitor <strong>liver function<\/strong>, <strong>blood sugar<\/strong>, <strong>uric acid<\/strong> and the <strong>lipid profile<\/strong> periodically, to adjust the dose and check safety.<\/p>\n<hr \/>\n<h2 id=\"myths\">Myths vs Facts<\/h2>\n<table style=\"border-collapse:collapse;width:100%;border:1px solid #e5e7eb;\">\n<thead>\n<tr>\n<th style=\"background:#fafafa;border:1px solid #e5e7eb;padding:10px 12px;\">Myth<\/th>\n<th style=\"background:#fafafa;border:1px solid #e5e7eb;padding:10px 12px;\">Fact<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">Niacin treats the heart and prevents strokes<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">Large trials showed no reduction in heart attacks when added to statins.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">If it is a vitamin it is safe at any dose<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">500 mg is a very high dose that can affect the liver and blood sugar; it needs medical supervision.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">Better cholesterol numbers = a healthier heart<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">Improved numbers do not necessarily mean fewer cardiac events, as the studies showed.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">Flushing means it is &#8220;working&#8221;<\/td>\n<td style=\"border:1px solid #e5e7eb;padding:10px 12px;\">Flushing is just a side effect of blood-vessel widening, not proof of benefit.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2 id=\"treatment\">Is It a Treatment for Heart Disease?<\/h2>\n<p>No. Niacin is a <strong>dietary supplement (vitamin B3)<\/strong>, not a proven medicine to treat heart disease or prevent its events. Heart health is managed by a doctor&#8217;s assessment, a healthy lifestyle, and approved medicines (such as statins when needed). Using high-dose niacin \u2014 if required \u2014 is an individual medical decision with monitoring, not self-treatment.<\/p>\n<hr \/>\n<h2 id=\"doctor\">When to See a Doctor<\/h2>\n<p>See a doctor before starting niacin at 500 mg, especially with liver disease, diabetes, gout, or if you take statins, or if symptoms appear such as yellowing of the skin\/eyes, abdominal pain, persistent nausea, high blood sugar or severe flushing. The doctor decides whether this dose suits your case and sets up monitoring.<\/p>\n<hr \/>\n<h2 id=\"expert\">NSL Expert Tip<\/h2>\n<p>Our tip at No Style Like: treat Niacin 500 mg for what it is \u2014 a <strong>high dose of vitamin B3 that is closer to a medicine than a general daily supplement<\/strong>. Do not self-use it for &#8220;heart health&#8221; or cholesterol without a doctor, and remember the large trials did not prove a heart benefit. If your goal is heart support, the foundation is medical assessment, lifestyle and approved treatment. Safety first, and medical supervision is essential at this dose.<\/p>\n<hr \/>\n<h2 id=\"faq\">Frequently Asked Questions About Niacin<\/h2>\n<p><strong>Does niacin treat the heart or prevent strokes?<\/strong><br \/>Large trials (AIM-HIGH and HPS2-THRIVE) showed no reduction in heart attacks; it is a supplement, not a proven treatment.<\/p>\n<p><strong>Why does it cause skin redness?<\/strong><br \/>This &#8220;flushing&#8221; is a common effect of blood-vessel widening at high niacin doses, and usually lessens with food and over time.<\/p>\n<p><strong>Is 500 mg safe for everyone?<\/strong><br \/>No; it is a high dose that can affect the liver, blood sugar and gout, and needs medical supervision.<\/p>\n<p><strong>Is it suitable for people with diabetes?<\/strong><br \/>It can raise blood sugar; use only with a doctor&#8217;s advice and adjustment of diabetes medicines.<\/p>\n<p><strong>How do I store it?<\/strong><br \/>In a dry place away from heat and out of the reach of children, and check the expiry date.<\/p>\n<hr \/>\n<h2 id=\"conclusion\">Conclusion<\/h2>\n<p>Niacin (vitamin B3) 500 mg by NOW Foods is a high-dose dietary supplement with a role in energy production and an effect on blood lipids, but <strong>large clinical trials did not prove it reduces heart attacks or strokes<\/strong>, and it has real side effects involving the liver, blood sugar, gout and flushing. We present it transparently as a supplement \u2014 not a heart treatment \u2014 while emphasizing that this dose should be used under a doctor&#8217;s supervision only. Shop with confidence and awareness from <a href=\"https:\/\/nostylelike.net\/en\/\">No Style Like<\/a>.<\/p>\n<p style=\"font-size:0.9em;color:#555;margin-top:16px;\">This information was reviewed by the No Style Like pharmacy content team. This content is informational only and does not promote any unproven claim, is not a substitute for consulting a doctor or pharmacist, and is not a treatment for any condition. High-dose niacin needs medical supervision. For more reliable information on niacin, see the <a href=\"https:\/\/ods.od.nih.gov\/factsheets\/Niacin-HealthProfessional\/\" target=\"_blank\" rel=\"noopener nofollow\">US NIH Office of Dietary Supplements<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<div dir=\"ltr\" style=\"font-family:inherit;\">\n<table style=\"border-collapse:collapse;width:100%;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden;\">\n<tbody>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:12px 14px;\"><strong>Name<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px 14px;\">Niacin (Vitamin B3)<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:12px 14px;\"><strong>Brand<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px 14px;\">NOW Foods<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:12px 14px;\"><strong>Strength<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px 14px;\">500 mg per capsule<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:12px 14px;\"><strong>Pack<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px 14px;\">100 capsules<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:12px 14px;\"><strong>Country of origin<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px 14px;\">USA<\/td>\n<\/tr>\n<tr>\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:12px 14px;\"><strong>Expiry<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px 14px;\">03\/2028<\/td>\n<\/tr>\n<tr style=\"border-bottom:0;border-top:1px solid #eee;\">\n<td style=\"background:#fafafa;border:1px solid #e5e7eb;padding:12px 14px;\"><strong>Note<\/strong><\/td>\n<td style=\"border:1px solid #e5e7eb;padding:12px 14px;\">High dose \u2013 use under medical supervision<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"ai-optimize-6\"><!-- Short Description --><\/p>\n<div style=\"background:#f9f9f9;border:1px solid #e5e7eb;border-radius:12px;padding:12px 14px;margin-top:12px;\">\n<p style=\"margin:0;\">Niacin (vitamin B3) 500 mg by NOW Foods, 100 capsules, is a high-dose dietary supplement with a role in energy production and an effect on blood lipids. Large trials did not prove it reduces heart attacks, and it has effects on the liver, blood sugar, gout and flushing; so this dose is used under a doctor&#8217;s supervision only. Consult a doctor before use. Available now from No Style Like.<\/p>\n<\/p><\/div>\n<\/div>\n","protected":false},"featured_media":11386128,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[39172],"product_cat":[42003,42034,42002],"product_tag":[38419,38420,35652,38421,36243,38423,38422,38417,38410,38416,38418],"class_list":["post-11386131","product","type-product","status-publish","has-post-thumbnail","product_brand-now-en","product_cat-dietary-supplements","product_cat-nervous-system-support","product_cat-vitamins","product_tag-cholesterol-support","product_tag-circulation-supplement","product_tag-energy-vitamins","product_tag-flush-niacin","product_tag-heart-health","product_tag-niacin-500-mg-en","product_tag-niacin-benefits","product_tag-niacin-supplement","product_tag-now-niacin","product_tag-vitamin-b3","product_tag-vitamin-b3-capsules","first","instock","featured","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/product\/11386131","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/comments?post=11386131"}],"version-history":[{"count":7,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/product\/11386131\/revisions"}],"predecessor-version":[{"id":11411298,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/product\/11386131\/revisions\/11411298"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/media\/11386128"}],"wp:attachment":[{"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/media?parent=11386131"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/product_brand?post=11386131"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/product_cat?post=11386131"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/product_tag?post=11386131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}