{"id":699923,"date":"2026-01-16T13:07:10","date_gmt":"2026-01-16T13:07:10","guid":{"rendered":"https:\/\/www.europesays.com\/uk\/699923\/"},"modified":"2026-01-16T13:07:10","modified_gmt":"2026-01-16T13:07:10","slug":"supplements-you-shouldnt-take-with-coffee-because-its-a-waste","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/uk\/699923\/","title":{"rendered":"Supplements you shouldn&#8217;t take with coffee because it&#8217;s a waste"},"content":{"rendered":"<p>It could be your best shot at a productive day.<\/p>\n<p>Coffee offers a bevy of <a href=\"https:\/\/nypost.com\/health\/is-coffee-good-or-bad-for-your-health-weighing-the-pros-and-cons\/\" target=\"_blank\" rel=\"noopener\">health perks<\/a>, from boosting brain function and reducing inflammation to improving heart health and supporting metabolism.<\/p>\n<p>Unfortunately, your morning brew can also affect how your body absorbs certain supplements, possibly making them less effective and triggering irritating side effects.<\/p>\n<p>You may want to rethink your morning routine. Caffeine interacts with many medications, including supplements. gstockstudio \u2013 stock.adobe.com<\/p>\n<p><a href=\"https:\/\/www.prnewswire.com\/news-releases\/more-americans-drink-coffee-each-day-than-any-other-beverage-bottled-water-back-in-second-place-302428696.html\" target=\"_blank\" rel=\"noopener\">About 66% of US adults<\/a> drink coffee every day, while <a href=\"https:\/\/www.crnusa.org\/newsroom\/three-quarters-americans-take-dietary-supplements-most-users-agree-they-are-essential\" target=\"_blank\" rel=\"noopener\">roughly 74%<\/a> take a dietary supplement \u2014 so there\u2019s bound to be some potentially problematic overlap.<\/p>\n<p>These are the five supplements you may want to think twice about washing down with coffee.<\/p>\n<p>Iron<\/p>\n<p>\u201c<a href=\"https:\/\/nypost.com\/2024\/08\/28\/health\/sports-nutritionist-reveals-what-to-know-about-iron-supplements\/\" target=\"_blank\" rel=\"noopener\">Iron<\/a> is the most clearly affected by coffee,\u201d <a href=\"https:\/\/www.instagram.com\/drkaranrajan\/?hl=en\" target=\"_blank\" rel=\"noopener\">Dr. Karan Rajan<\/a> \u2014 chief of science at <a href=\"https:\/\/www.thronescience.com\/\" target=\"_blank\" rel=\"noopener\">Throne Science<\/a>, a gut health tech company \u2014 told The Post about the popular supplement.<\/p>\n<p><a href=\"https:\/\/nypost.com\/2025\/01\/09\/health\/drinking-coffee-at-this-time-of-day-could-extend-your-life-study\/\" target=\"_blank\" rel=\"noopener\">Coffee is packed with polyphenols<\/a>, which are powerful antioxidants that protect against oxidative stress and fight inflammation.<\/p>\n<p>Chlorogenic acids are a major group of polyphenols in coffee \u2014 they add to its flavor and health benefits.<\/p>\n<p>Caffeine can interfere with the absorption of certain vitamins and minerals. Serhii \u2013 stock.adobe.com<\/p>\n<p>Rajan noted that polyphenols like chlorogenic acid can bind to non-heme iron in the digestive tract, making it harder for the body to absorb.<\/p>\n<p>\u201cThis matters most for people who are iron-deficient, menstruating, pregnant or plant-based,\u201d Rajan said.<\/p>\n<p>\u201cPractical advice would be: If you\u2019re taking iron, do it at least one to two hours away from coffee. Vitamin C can help offset the inhibition caused by iron.\u201d<\/p>\n<p>Zinc<\/p>\n<p>\u201cCoffee can modestly reduce zinc absorption, again due to polyphenols binding minerals,\u201d Rajan said.<\/p>\n<p>\u201cThe effect is dose- and timing-dependent and usually small for people eating a zinc-adequate diet.\u201d<\/p>\n<p>Foods high in zinc include oysters, red meat, poultry, shellfish, cashews, almonds, pumpkin and hemp seeds, lentils, chickpeas, beans, whole grains, dairy, eggs and fortified cereals.<\/p>\n<p>Those supplementing with zinc for deficiency or immune support may benefit from taking it separately from coffee, Rajan said.<\/p>\n<p>Calcium<\/p>\n<p>\u201cCoffee has a small inhibitory effect on calcium absorption, mainly due to caffeine increasing urinary calcium loss rather than blocking absorption outright,\u201d Rajan explained.<\/p>\n<p><a href=\"https:\/\/www.nutrition.org.uk\/media\/30nfnmdi\/dietary-calcium-and-health.pdf\" target=\"_blank\" rel=\"noopener\">Research has estimated<\/a> that about 5 milligrams of calcium are lost per cup of coffee.<\/p>\n<p>You may need to take your supplement with water and wait an hour or two before drinking coffee to optimize absorption. Angelov \u2013 stock.adobe.com<\/p>\n<p>\u201cFor most people with adequate calcium intake, this is negligible,\u201d Rajan said.<\/p>\n<p>\u201cIf someone relies heavily on <a href=\"https:\/\/nypost.com\/2024\/07\/23\/health\/vitamin-d-calcium-keep-bones-strong-how-much-you-need\/\" target=\"_blank\" rel=\"noopener\">supplements for bone health<\/a>, spacing calcium away from coffee is sensible, but it\u2019s not a major concern for the general population.\u201d<\/p>\n<p>Magnesium<\/p>\n<p>Coffee doesn\u2019t strongly block <a href=\"https:\/\/nypost.com\/2024\/08\/26\/health\/nutrition-doctor-reveals-magnesium-supplement-pros-and-cons\/\" target=\"_blank\" rel=\"noopener\">magnesium<\/a> absorption, Rajan said, but caffeine does increase urine output.<\/p>\n<p>This mild diuretic effect can lead to magnesium loss, particularly with high caffeine intake.<\/p>\n<p>\u201cFor simplicity, magnesium is often better taken later in the day, but coffee isn\u2019t a hard \u2018no,\u2019 \u201d Rajan said.<\/p>\n<p>Separately, mixing magnesium citrate or sulfate with coffee can cause diarrhea or stomach cramps because these forms of magnesium and caffeine have laxative effects.<\/p>\n<p>B vitamins<\/p>\n<p>\u201cMost B vitamins are not meaningfully blocked by coffee,\u201d Rajan said. \u201cHowever, caffeine can increase urinary excretion of some B vitamins (notably B1).\u201d<\/p>\n<p>B vitamins are water-soluble, meaning that they dissolve in water and excess amounts are flushed out through urine.<\/p>\n<p>Vitamin B1, or thiamine, turns carbs into energy and supports healthy nerve, muscle and heart function.<\/p>\n<p>Rajan said caffeine\u2019s diuretic effect doesn\u2019t matter much unless the person is consuming a small amount of B1 or a lot of caffeine. <\/p>\n<p>\u201cFrom a practicality standpoint, B vitamins can still be taken with coffee without major concern,\u201d Rajan added.<\/p>\n<p>\t\t\t\t\t\t<script async src=\"\/\/www.instagram.com\/embed.js\"><\/script><\/p>\n","protected":false},"excerpt":{"rendered":"It could be your best shot at a productive day. Coffee offers a bevy of health perks, from&hellip;\n","protected":false},"author":2,"featured_media":699924,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4318],"tags":[18486,27368,578,2915,13842,105,4434,4471,16,15,66194,6585,2488],"class_list":{"0":"post-699923","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-nutrition","8":"tag-antioxidants","9":"tag-caffeine","10":"tag-coffee","11":"tag-exclusive","12":"tag-food-drink","13":"tag-health","14":"tag-nutrition","15":"tag-supplements","16":"tag-uk","17":"tag-united-kingdom","18":"tag-urine","19":"tag-vitamins","20":"tag-wellness"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@uk\/115904934286996943","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/699923","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/comments?post=699923"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/699923\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media\/699924"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media?parent=699923"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/categories?post=699923"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/tags?post=699923"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}