&gt;Virtually no vitamins or supplements have actually been shown to have any benefit in proper randomised trials in normal people without severe deficiencies.<p>Does this mean vitamin&#x2F;mineral&#x2F;iron supplements work for covering vitamin deficiencies ?<p>So say I want to start a basic diet where I just eat whey + oat + seed&#x2F;nuts to easily control my macros and have an easy to prepare diet - is there evidence that I will not have deficiencies if I take a &quot;daily formula&quot; supplement ?<p>I&#x27;ve done this on my previous job for 6 months - it worked great for losing weight&#x2F;gaining strength - I never felt weak, exercise recovery was as fast if not faster than when I was previously working out with a normal protein heavy diet (only downside was digestion adjusting for the firs two weeks - after that had 0 problems). When I changed jobs I lost my routine and stopped working out - been a hectic year.  I&#x27;m thinking of start this again and staying on it - I&#x27;m wondering if there&#x27;s any research if vitamin supplements work for people with deficiencies.