Low energy can come from many causes: poor sleep, stress, low nutrient intake, heavy training, medical conditions, medication side effects, or simply not eating enough. Supplements can help in some situations, but they work best when they address a real need.
Some energy supplements act like stimulants. Others support nutrient status, oxygen transport, mitochondrial function, stress resilience, or exercise performance. The best choice depends on why your energy is low in the first place.
What Are Energy Supplements?
Energy supplements are products used to support alertness, stamina, physical performance, or normal energy metabolism. They do not all work the same way.
Some, such as caffeine-containing products, provide a short-term boost. Others, such as vitamin B12, iron, magnesium, vitamin D, creatine, and CoQ10, are more about supporting the body’s normal energy systems. These are most useful when intake is low, demand is high, or a deficiency is present.
Best Energy Supplements to Consider in 2026
1. Vitamin B12
Vitamin B12 supports red blood cell formation, nerve function, DNA production, and normal energy metabolism. Low B12 can contribute to fatigue, weakness, brain fog, and neurological symptoms.
B12 is found mainly in animal-based foods, so vegans and some vegetarians are more likely to need supplementation. Older adults and people with certain digestive conditions may also have trouble absorbing enough B12 from food.
B12 is not a stimulant. It is most likely to help energy when low B12 status is part of the problem.
2. Iron
Iron is needed to make haemoglobin, the protein in red blood cells that carries oxygen around the body. Low iron can reduce oxygen delivery to tissues and may cause fatigue, weakness, dizziness, shortness of breath, or poor exercise tolerance.
Iron supplements may be useful for people with confirmed low iron or iron-deficiency anaemia. Higher-risk groups include people with heavy menstrual bleeding, pregnant people, frequent blood donors, endurance athletes, and some people following plant-based diets.
Iron should not be taken casually. Too much iron can be harmful, so it is best guided by blood tests and medical advice.
3. Coenzyme Q10
Coenzyme Q10, often called CoQ10, is involved in mitochondrial energy production. Mitochondria use nutrients to produce ATP, the main energy currency of the cell.
CoQ10 levels may decline with age, and some medications, especially statins, may lower CoQ10 levels in certain people. Supplementation is commonly used by people interested in energy, cardiovascular health, and muscle function.
CoQ10 comes mainly in two forms: ubiquinone and ubiquinol. Ubiquinol is often marketed as the more absorbable form, although both forms can raise CoQ10 levels.
4. Creatine
Creatine helps regenerate ATP during short, intense bursts of activity. It is one of the better-studied supplements for strength, power, sprint performance, and resistance training.
Creatine is not just for bodybuilders. It may also be useful for people who do repeated high-intensity exercise, older adults trying to preserve muscle function, and people who eat little or no meat.
Creatine does not create a stimulant-like feeling. Its benefits tend to build over time with consistent use.
5. Ashwagandha
Ashwagandha is an adaptogenic herb commonly used for stress, sleep quality, and perceived energy. It may help some people feel less drained when stress is a major contributor to fatigue.
Its main value is not that it “pushes” energy like caffeine. It is more often used to support stress resilience and recovery. Some studies suggest benefits for stress, sleep, and exercise performance, though results vary depending on the extract, dose, and study population.
Ashwagandha is not suitable for everyone. People with thyroid conditions, autoimmune conditions, liver concerns, pregnancy, or medication use should be cautious and speak with a healthcare professional first.
6. Rhodiola Rosea
Rhodiola rosea is another adaptogenic herb often used for fatigue, stress, and mental performance under pressure. It is typically positioned as a supplement for people who feel mentally tired rather than physically undernourished.
Some research suggests Rhodiola may help reduce perceived fatigue and support performance during stressful periods. The evidence is not uniform, and effects may depend on the extract used.
Rhodiola can feel mildly stimulating for some people, so it is often taken earlier in the day.
7. L-Carnitine
L-carnitine helps transport fatty acids into mitochondria, where they can be used for energy. The body can make carnitine, and it is also found in foods, especially meat.
Supplementation is often discussed for exercise performance, recovery, ageing, and fatigue. It may be more relevant for older adults, people with low dietary intake, or people with specific medical needs, but it is not a guaranteed energy booster for everyone.
Different forms exist, including L-carnitine, acetyl-L-carnitine, and L-carnitine L-tartrate. Acetyl-L-carnitine is often used in cognitive-energy contexts, while L-carnitine L-tartrate is common in sports nutrition.
8. Magnesium
Magnesium is involved in hundreds of enzyme reactions, including those related to energy metabolism, muscle contraction, nerve signalling, and glucose handling.
Low magnesium intake can contribute to tiredness, muscle cramps, poor sleep, and general weakness. People who eat few whole grains, legumes, nuts, seeds, and leafy greens may not get enough.
Common forms include magnesium citrate, glycinate, malate, and oxide. Magnesium oxide is widely available but may be less well absorbed and more likely to cause digestive discomfort. Magnesium glycinate is often used when sleep or tolerability is a concern.
9. Vitamin D
Vitamin D supports bone health, immune function, muscle function, and overall wellbeing. Low vitamin D is common in people who get little sun exposure, spend most of their time indoors, cover most of their skin, have darker skin, or live in places with limited winter sunlight.
Low vitamin D can be associated with fatigue and muscle weakness, but supplementation is most useful when levels are actually low. A blood test can confirm whether supplementation is needed.
Vitamin D is fat-soluble, so excessive intake over time can be harmful. Dose should match individual need.
10. PQQ
PQQ, or pyrroloquinoline quinone, is a compound marketed for mitochondrial support and cellular energy. It is often discussed alongside CoQ10 because both are linked to mitochondrial function.
PQQ is sometimes promoted for energy, ageing, and cognitive support. However, the human evidence is still more limited than for staples like creatine, vitamin D, iron, magnesium, or B12.
PQQ may be worth considering for people specifically interested in mitochondrial-support supplements, but it should not be treated as a first-line fix for fatigue.
How to Choose the Right Energy Supplement
Start With the Likely Cause of Low Energy
The best supplement depends on the cause. For example, low iron, low B12, poor sleep, under-eating, high stress, and overtraining are different problems. They need different solutions.
If fatigue is persistent, sudden, severe, or unexplained, it is worth checking for common medical causes before relying on supplements.
Match the Supplement to Your Diet and Lifestyle
A vegan may need B12 more than creatine. A person with heavy menstrual bleeding may need iron testing. A strength athlete may benefit from creatine. Someone under chronic stress may be more interested in ashwagandha or Rhodiola.
Check Quality and Testing
Choose supplements from reputable brands that use third-party testing where possible. Certifications from organisations such as USP, NSF, or Informed Choice can help reduce the risk of contamination, incorrect dosing, or undeclared ingredients.
This matters especially for athletes, people taking multiple supplements, and anyone subject to drug testing.
Consider Form and Absorption
The form of a supplement can affect tolerability and absorption. For example, magnesium glycinate may be gentler for some people than magnesium oxide. Ubiquinol may be better absorbed than ubiquinone for some users. Iron form and dose can affect stomach upset.
Watch for Interactions and Side Effects
Supplements can interact with medications and medical conditions. Iron, ashwagandha, Rhodiola, magnesium, vitamin D, and CoQ10 are not automatically risk-free.
Speak with a healthcare professional before starting a supplement if you are pregnant, managing a medical condition, taking prescription medication, or planning to use multiple products at once.
Lifestyle Habits That Support Better Energy
Eat Enough Nutrient-Dense Food
Energy starts with adequate food intake. A diet built around protein, whole grains, fruit, vegetables, legumes, nuts, seeds, and healthy fats provides the raw materials needed for normal energy production.
Prioritise Sleep
No supplement can fully compensate for poor sleep. Consistent sleep timing, enough total sleep, and good sleep quality are central to daytime energy.
Exercise Consistently
Regular physical activity can improve energy, mood, circulation, insulin sensitivity, and sleep. The key is matching training intensity to recovery. Too much exercise with too little rest can make fatigue worse.
Manage Stress
Chronic stress can leave people feeling wired, tired, or both. Stress-management practices such as walking, meditation, breathing exercises, time outdoors, therapy, journaling, or yoga may support energy by improving recovery.
The Bottom Line
The right supplement answers a specific gap, not a general request for more energy. Nutrient shortfalls like low B12, iron, or vitamin D call for direct replacement, ideally confirmed by blood work rather than assumed. Mitochondrial and performance goals sit in a different category entirely, covered by creatine, CoQ10, or PQQ. Stress-driven fatigue is different again, which is where adaptogens like ashwagandha and Rhodiola fit, and neither substitutes for the other.
None of this replaces the basics. Sleep, adequate food intake, sensible training load, and stress management still account for more of a person’s daily energy than any supplement stack. Fatigue that is persistent or unexplained is worth taking to a doctor before it’s treated with pills.
References
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