Taking Vitamin D Supplements But Not Seeing Any Difference In Bloodwork Cardiologist Shares 3 Mistakes People Make

. He explains that the dosage may not be sufficient to correct the degree of deficiency, particularly in people with severely depleted levels. In other cases, the body may be lacking key nutrients that support vitamin D absorption and metabolism, making it harder for the supplement to work effectively.

The cardiologist notes, “The problem usually isn’t the supplement itself. In most cases, it’s because Vitamin D is being taken incorrectly, the dose isn’t appropriate for the degree of deficiency, or the body lacks some of the nutrients needed to properly activate and use it. I see this all the time in clinic. Someone has been taking Vitamin D faithfully for months, but when we check their labs, their levels are still low.”

However, Dr Yaranov points out that the good news is that the problem is usually easy to fix. He highlights three common mistakes people often make when taking vitamin D supplements that may be preventing their levels from improving.

Dr Yaranov highlights that vitamin D is a fat-soluble vitamin, meaning it needs dietary fat to be absorbed effectively by the body. For this reason, he recommends taking vitamin D supplements with a meal that contains healthy fats rather than on an empty stomach.

He explains, “Vitamin D is a fat-soluble vitamin. Taking it with a meal that contains healthy fats can significantly improve absorption compared with taking it on an empty stomach.”

According to the cardiologist, vitamin D deficiency is not the same for everyone, which means there is no one-size-fits-all dosage. A supplement dose designed to maintain healthy vitamin D levels may not be enough to correct a significant deficiency, making personalised dosing an important part of effective treatment.

He notes, “Not all deficiencies are the same. A dose that maintains normal levels may not be enough to correct a significant deficiency. The only way to know is to check your blood level and adjust accordingly.”

Another factor to consider is the role of other nutrients involved in vitamin D metabolism. Dr Yaranov points out that magnesium is essential for activating vitamin D in the body, meaning that low magnesium levels may reduce the effectiveness of your vitamin D supplements and make it harder to raise your levels.

He explains, “Vitamin D doesn’t work alone. Magnesium helps activate vitamin D in the body, and low magnesium levels may limit its effectiveness even when you’re taking a supplement consistently.”

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. It is based on user-generated content from social media. HT.com has not independently verified the claims and does not endorse them.

Eshana Saha is a fresh face in lifestyle and cultural journalism, bringing a refined, multidisciplinary perspective to the intersection of entertainment, fashion and holistic wellbeing. With less than a year of professional experience, she has quickly adapted to high-pressure editorial environments and currently works full-time with HT Media. Prior to this, she interned for nearly six months with Hindustan Times’ entertainment and lifestyle vertical, where she gained hands-on experience in digital reporting, trend analysis and editorial storytelling. Based in New Delhi, Eshana specialises in comprehensive coverage of major cultural moments — from international film press tours to the curated aesthetics of global fashion showcases, award shows and music-centred events. She holds a Bachelor’s degree in English from St Xavier’s University, Kolkata, and a Master’s degree in English from the University of Delhi, equipping her with a strong academic foundation and a keen ability to deconstruct complex cultural trends into clear, high-impact narratives. Beyond the red carpet, Eshana has developed a growing focus on health and wellbeing reporting. She bridges the gap between celebrity-driven trends and practical, evidence-informed lifestyle advice, ensuring her work remains both aspirational and grounded in editorial rigour. She has extensively covered the health implications of Delhi’s air pollution crisis, while also playing a key role in amplifying expert-led insights on women’s health and mental wellbeing, helping translate complex medical perspectives into informed, impactful public awareness. An artist at heart, she explores multiple creative forms — from visual arts and music to culinary experiments — and brings a creative’s eye for nuance, texture and detail to every story. Whether analysing runway dynamics or examining emerging wellness movements, she remains committed to accuracy and the highest standards of contemporary journalistic ethics.Read More