The ONLY 5 Supplements You Actually Need (Stop Wasting Money)
Dr. Eric Berg DCPublished on April 10, 2026
Summary authored by editor@wellifi.com
TLDR Summary
To improve overall health, focus on five foundational supplements: Vitamin D3 and K2, magnesium, potassium, omega-3s, and trace minerals. These supplements address common deficiencies and support various bodily functions.
Key Points
- Vitamin D3 and K2 are essential for managing inflammation and bone health.
- Magnesium is crucial for energy production and the effectiveness of vitamin D.
- Most people are deficient in potassium, which supports heart health and energy levels.
- Omega-3 fatty acids help reduce inflammation and improve brain function.
- Trace minerals are often lacking in diets due to modern farming practices.
The Only Five Supplements You Actually Need
If you’ve been following my channel for any length of time, you may have noticed I cover a wide variety of supplements and health topics. With over 7,000 videos, it can be overwhelming trying to keep up with all the information. In this article, I want to simplify the conversation and focus on foundational supplements that most people need, rather than diving into situational supplements.
1. Vitamin D3 and K2
Vitamin D is a crucial nutrient that is often difficult to obtain through diet alone. While sun exposure can help, many people, especially those with darker skin or living in northern regions, struggle to get adequate amounts. The recommended dietary allowance (RDA) falls short of what is actually necessary for optimal health. To maintain healthy blood levels, aim for at least 10,000 IU of vitamin D3 daily, especially if you are dealing with inflammation or other health issues. Pairing vitamin D3 with vitamin K2 is essential, as K2 helps prevent excess calcium from accumulating in soft tissues.
2. Magnesium
Often referred to as the most important mineral, magnesium plays a vital role in enabling the proper function of vitamin D and is crucial for energy production. Many people do not meet the RDA for magnesium, which is often set too low. For therapeutic effects, I recommend taking about 250 mg of magnesium glycinate four times a day. This form is highly absorbable and can help improve sleep quality and muscle function.
3. Potassium
Potassium is another electrolyte that most people are deficient in. The RDA for potassium is set at 4,700 mg, but many individuals do not come close to this amount. Adequate potassium levels can help manage blood sugar and blood pressure, improve energy levels, and support heart health. For those engaged in rigorous exercise or following a low-carb diet, ensuring sufficient potassium intake is essential.
4. Omega-3 Fish Oil or Cod Liver Oil
Omega-3 fatty acids, particularly EPA and DHA, are vital for reducing inflammation and supporting brain function. Due to the high consumption of omega-6 fatty acids in modern diets, supplementing with omega-3s can help restore balance. I recommend consuming omega-3 supplements at higher doses, especially if you have inflammatory conditions.
5. Trace Minerals
Trace minerals, such as iodine, manganese, iron, selenium, and zinc, are needed in smaller quantities but are often lacking in our diets due to modern farming practices. Taking additional trace minerals can help improve various aspects of health, including skin, hair, and testosterone levels. It's important to choose high-quality sources of these minerals to avoid deficiencies.
What to Avoid
Common supplements like generic multivitamins, iron (unless you are anemic), and calcium supplements can be unnecessary or even harmful. Many multivitamins contain fillers and synthetic ingredients that do not contribute to health. Instead, focus on getting nutrients from whole foods.
Conclusion
By focusing on these five foundational supplements—Vitamin D3 & K2, magnesium, potassium, omega-3s, and trace minerals—you can significantly improve your overall health and address common deficiencies. Remember, it’s essential to consult with a healthcare professional before starting any new supplement regimen.
For a deeper understanding of potassium and its importance, check out my next video.
