- Most nutritional supplements are just marketing hype.
- Some supplements, however, are backed by multiple research studies. You’ll learn about 15 with solid efficacy/safety evidence below.
- You’ll also find out which ones, specifically, may help with these health challenges: Energy / Focus, Gut Health, Immunity, Pain / Inflammation, Fat Loss / Lean Muscle Gain, Relaxation / Anxiety
Do nutritional supplements work?
While it’s true that most dietary supplements are complete junk that don’t do much of anything, saying all supplements have no benefit is just plain absurd.
Because there are a handful of health and wellness supplements that have very promising health benefits.
In this article, you’ll learn about 15 of the best supplements that help address some of the most common health challenges (losing weight, easing digestive issues, increasing energy, boosting immunity, alleviating pain, and decreasing anxiety).
Each of the supplements you will learn about has multiple peer-reviewed, placebo-controlled research that support its efficacy and safety.
I’m confident you’ll find something in here that can help you.
Click the links below to jump around or scroll down to get started.
Pain / Inflammation
Muscle Gain / Weight Loss
Stress / Anxiety / Sleep
The Best Supplements for Energy / Focus
There’s no shortage of supplements touted for their ability to help you improve energy and focus.
Unfortunately, most don’t work.
Here are three that do:
Rhodiola rosea is an herb that’s native to the arctic regions of Europe, Asia, and Alaska. It has a long history of use as a medicinal plant in Iceland, Sweden, France, Russia, and Greece.
Rhodiola is a popular adaptogen, a class of plants can help your body combat physical, chemical or biological stressors.
It’s most researched benefits are as-follows:
|1. Reduce Fatigue|
2. Improve Cognition
Preliminary evidence has also looked at neuroprotection and lowering symptoms of depression, among other possible benefits (although more research is needed on these).
Is Rhodiola Safe?
Rhodiola is generally recognized as safe but might cause dizziness, dry mouth, or excessive saliva production for some people. Here are some other information safety considerations:
- Pregnancy and breast-feeding: There isn’t enough reliable information about the safety of taking Rhodiola if you are pregnant or breast feeding. Stay on the safe side and avoid use.
- Autoimmune diseases: Rhodiola might simulate the immune system, which may impact people with autoimmune conditions such as multiple sclerosis (MS), rheumatoid arthritis (RA), and others.
- Diabetes: Rhodiola might reduce blood sugar levels, so should be used with caution in patients taking insulin or other diabetes medications.
- Low blood pressure: Rhodiola might lower blood pressure, so should be used with caution in patients taking blood pressure meds.
If you’re on any medications or have pre-existing conditions, talk to your doctor before taking any nutritional supplement.
Ginkgo biloba is one of the oldest living tree species. Most ginkgo supplements are made with extract prepared from its fan-shaped leaves.
The most helpful components of ginkgo are believed to be flavonoids, which have powerful antioxidant qualities, and terpenoids, which help improve circulation by dilating blood vessels.
These are the biggest benefits of taking a ginkgo supplement, based on the body of evidence available today:
|1. Reduce cognitive decline (particularly in people who have dementia). |
2. Improve short term memory.*
*Note: Ginkgo’s effect on memory enhancement has had conflicting results. While some evidence suggests that ginkgo extract might modestly improve memory in healthy adults, most studies indicate that ginkgo doesn’t improve memory, attention or brain function.
Is Ginkgo Biloba Safe?
When used orally in moderate amounts, ginkgo appears to be safe for most healthy adults. Here are some important safety considerations when taking this supplement though:
- In certain people, ginkgo can cause headaches, dizziness, heart palpitations, upset stomach, constipation, and allergic skin reactions.
- If you are epileptic or prone to seizures, avoid ginkgo.
- If you are older, have a bleeding disorder or are pregnant, don’t take ginkgo because it might increase your risk of bleeding.
- Ginkgo might interfere with the management of diabetes.
- Don’t eat raw or roasted ginkgo seeds, which can be poisonous.
- Possible interactions include: Alprazolam (Xanax), Anticoagulants and anti-platelet drugs, herbs and supplements, Anticonvulsants, Antidepressants, Certain statins, Diabetes drugs, Ibuprofen
The herbal remedies collectively referred to as “ginseng” are derived from the roots of several different plants. One of the most commonly used and researched of the ginseng plants is Panax ginseng, also called Asian or Korean ginseng.
The main active components of Panax ginseng are ginsenosides, which have been shown to have a variety of beneficial effects, including anti-inflammatory, antioxidant, and anticancer effects.
Results of clinical research studies demonstrate that Panax ginseng may improve psychologic function, immune function, and conditions associated with diabetes.
|1. Improve cognition and focus.|
2. Reduce blood sugar.
3. Boost happiness and well being.
Is Ginseng Safe?
- Overall, Panax ginseng appears to be well tolerated, although caution is advised about combining it with some pharmaceuticals, such as warfarin, oral hypoglycemic agents, insulin, and phenelzine.
- Because ginseng may affect blood sugar levels, people taking drugs for diabetes should not use ginseng without talking to their doctor first. Ginseng can interact with warfarin and with some medicines for depression. Do not take ginseng without consulting your doctor if you take any medications. Caffeine may amplify ginseng’s stimulant effects.
- Given the lack of evidence about its safety, ginseng is not recommended for children or for women who are pregnant or breastfeeding.
The Best Supplements for Gut Health
GI issues plague so many of us these days (your humble author included).
Here are some supplements that can offer relief:
I wrote about probiotics in my article Do Probiotics Work? Here’s What Science Really Says.
Here are the biggest takeaways from that piece:
- Many foods claiming probiotic content don’t contain enough for health benefit.
- Eating fermented foods is good … but not the same as taking probiotics.
- More strains doesn’t always means better. What’s more important is finding a product/strain that has been studied to treat the health condition you’re looking to improve.
- Talk to your doctor (preferably a gastroenterologist) about which probiotics you should be taking for specific health conditions.
- Diet and lifestyle are still the most important determining factors of gut microbial composition.
With that in mind, here are some strains that do appear to work for GI health:
|1. L. acidophilus produces a number of powerful antimicrobial compounds in the gut that can inhibit the growth and toxin producing capabilities of some 23 known disease-causing pathogens. |
2. Bifidobacteria consume old fecal matter, have the ability to remove cancer-forming enzymes, and protect against the formation of liver, colon, and mammary gland tumors.
3. L. salivarius helps digest foods for a healthy intestinal tract and makes vital nutrients more assimilable.
4. L. plantarum has the ability to eliminate thousands of species of pathogenic bacteria (such as E. coli).
5. B. coagulans appears to help alleviate abdominal pain and diarrhea in IBS patients, decrease gas, and improve bowel movements.
Are Probiotics Safe?
That’s why’s it’s so important to make sure the strain(s) you’re taking have been studied for safety and efficacy in peer-reviewed, placebo-controlled clinical trials.
Personally, I take two capsules of Pure Food DIGEST (Digestive Enzymes + Probiotics + Prebiotics) every day–one capsule with breakfast and one with dinner–and it has made a huge difference in how I feel.
Turmeric is a spice that’s a member of the ginger family. It’s commonly used in several types of Asian cuisine. Turmeric roots contains a yellow-colored compound called curcumin that has some pretty impressive health properties.
In addition to the digestive benefits below, there is strong evidence that shows turmeric is high in anti-oxidants, which help protect your cells from damage and can help reduce inflammation, pain, anxiety and even symptoms of depression.
|1. Relieve IBS|
2. Aid digestion
3. Ease heartburn
4. Reduce gas and bloating
Is Turmeric Safe?
According to JECFA (The Joint United Nations and World Health Organization Expert Committee on Food Additives) and EFSA (European Food Safety Authority) reports, the Allowable Daily Intake (ADI) value of curcumin is 0–3 mg/kg body weight.
Despite this well-established safety profile, some negative side effects have been reported. A small percentage of people in several clinical studies reported nausea and diarrhea.
Dietary fiber is a plant-derived nutrient that can’t be digested by your body. This is a good thing because fiber helps move material through your digestive system.
Problem is, most Americans still aren’t getting enough of it from their diet, especially if you follow a low carb or ketogenic diets.
The recommended daily intake of fiber is at least 25-30 grams. Most people get around 15.
A 2019 meta analysis of studies and clinical trials conducted over nearly 40 years showed that the health benefits of eating at least 25g or more of dietary fiber a day included:
|1. Lower your risk of heart disease, stroke, diabetes, many types of cancers.|
2. Improve digestive health.
3. Live longer.
If you’re struggling to get enough fiber from whole foods in your diet, then a supplement containing a little extra fiber may help. In rare cases, eating more fiber can lead to side effects. Here are some specific examples:
Is Fiber Safe?
- Fiber supplements may decrease the absorption of some medications. Therefore, you should not take supplements within 2 hours of taking other medications.
- When using fiber supplements or increasing dietary fiber intake, you should gradually increase your intake over a few weeks to avoid or reduce adverse effects such as intestinal flatulence, bloating, diarrhea, and cramping.
- If you have a preexisting medical conditions, and especially one in which you need to restrict fluid intake (e.g., renal dysfunction or congestive heart failure), or if you’re currently taking any medications you should discuss the use of fiber supplements with your primary health care provider.
- If you have intestinal ulcerations, stenosis, or disabling adhesions you should avoid fiber supplements because of the possibility of fecal impaction or intestinal obstruction.
The Best Supplements for Immunity
Zinc is an essential trace mineral and the second most abundant metal in humans. Since the human body does not store excess zinc, it must be consumed regularly as part of the diet. Zinc deficiency in humans is quite prevalent, affecting over two billion people.
Here are some proven benefits of taking a zinc supplement:
|1. Boost your immune system. |
2. Treating common cold and recurrent ear infections, the flu, upper respiratory tract infections.
Recommended Dietary Allowances (RDAs) for Zinc
|0–6 months||2 mg||2 mg|
|7–12 months||3 mg||3 mg|
|1–3 years||3 mg||3 mg|
|4–8 years||5 mg||5 mg|
|9–13 years||8 mg||8 mg|
|14–18 years||11 mg||9 mg||12 mg||13 mg|
|19+ years||11 mg||8 mg||11 mg||12 mg|
Source: Institute of Medicine, Food and Nutrition Board. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc
Is Zinc Safe?
- Zinc is likely safe for most adults when applied to the skin, or when taken by mouth in amounts not larger than 40 mg daily.
- In some people, zinc might cause nausea, vomiting, diarrhea, metallic taste, kidney and stomach damage, and other side effects. Using zinc on broken skin may cause burning, stinging, itching, and tingling.
- Zinc should not be inhaled through the nose, as it might cause permanent loss of smell. Avoid using nose sprays containing zinc.
- Taking more than 100 mg of supplemental zinc daily or taking supplemental zinc for 10 or more years doubles the risk of developing prostate cancer. There is also concern that taking large amounts of a multivitamin plus a separate zinc supplement increases the chance of dying from prostate cancer.
- Taking 450 mg or more of zinc daily can cause problems with blood iron. Single doses of 10-30 grams of zinc can be fatal.
The Best Supplements for Pain / Inflammation
Almost a third of Americans suffer from chronic pain–nearly 100 million people.
Prescription pain medications like opoids have become a major problem though.
Here are some supplements that can help relieve pain naturally, without the use of prescription meds:
Glucosamine is a supplement derived from shellfish that may provide minor pain relief and help people who suffer from arthritis (particularly of the knee).
Chondroitin is a supplement frequently paired with glucosamine as a combination therapy to help with joint pain and stiffness, and other symptoms of osteoarthritis.
|1. Decrease pain.|
2. Lessen arthritis symptoms.
3. Reduce collagen degradation.
Are Glucosamine / Chondroitin Safe?
- No serious side effects have been reported in large, well-conducted studies of people taking glucosamine, chondroitin, or both for up to 3 years.
- However, glucosamine or chondroitin may interact with the anticoagulant (blood-thinning) drug warfarin (Coumadin).
- A study in rats showed that long-term use of moderately large doses of glucosamine might damage the kidneys. Although results from animal studies don’t always apply to people, this study does raise concern.
- Glucosamine might affect the way your body handles sugar, especially if you have diabetes or other blood sugar problems, such as insulin resistance or impaired glucose tolerance.
Omega-3 fatty acids are considered essential fats—your body can’t make them from scratch and therefore must get them from food. Foods high in Omega-3 include fish, vegetable oils, nuts, flax seeds, and leafy vegetables.
Omega-3 fats are an integral part of cell membranes throughout the body and help regulate blood clotting, contraction and relaxation of artery walls, and inflammation.
There are three main omega-3s:
- Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) come mainly from fish, so they are sometimes called marine omega-3s.
- Alpha-linolenic acid (ALA), the most common omega-3 fatty acid in most Western diets, is found in vegetable oils and nuts (especially walnuts), flax seeds and flaxseed oil, leafy vegetables, and some animal fat, especially in grass-fed animals.
Omega-3 fats have been shown to help with a variety of health conditions …
|1. Prevent heart disease and stroke by lowering cholesterol and triglycerides.|
2. Control lupus, eczema, and rheumatoid arthritis.
3. Play protective roles in cancer and other conditions.
4. Reduce symptoms of depression.
5. Reduce arthritis-related joint pain.
I personally use Krill Oil, and highly recommend it.
Are Omega-3 Fatty Acids Safe?
- Side effects of omega-3 supplements are usually mild. They include unpleasant taste, bad breath, bad-smelling sweat, headache, and gastrointestinal symptoms such as heartburn, nausea, and diarrhea.
- Several large studies have linked higher blood levels of long-chain omega-3s with higher risks of prostate cancer. However, other research has shown that men who frequently eat seafood have lower prostate cancer death rates and that dietary intakes of long-chain omega-3s aren’t associated with prostate cancer risk. The reason for these apparently conflicting findings is unclear.
- Omega-3 supplements may interact with drugs that affect blood clotting.
- It’s uncertain whether people with seafood allergies can safely take fish oil supplements.
Pycnogenol, also known as “French Maritime Pine Bark Extract,” contains catechins similar to those found in green tea, grape seed extract and cocoa polyphenols.
Pcynogenol does appear to possess dual anti-oxidant and anti-inflammatory properties, and its benefits include increased blood flow and improved blood glucose control.
1. Promotes healthy aging.
- One study showed unwanted effects of a “mild and transient nature,” such as gastrointestinal problems, vertigo, headache and nausea.
The Best (Legal) Supplements for Building Muscle and Losing Fat
Proteins are organic molecules made up of amino acids (the building blocks of life). Protein helps build, maintain, and replace the tissues in your body. Your muscles, organs, and immune system are made up mostly of protein.
It’s well known that eating an adequate amount of protein is necessary if you’re trying to alter your body composition (gain muscle, lose fat, etc.).
Many folks, particularly those who follow a plant-based diet, struggle to get adequate protein from food alone though.
That’s where taking a protein powder supplement may help.
Here are some known benefits:
|1. Build lean body mass (muscle). |
2. Reduce body fat.
3. Maintain a healthy weight.
4. Strengthen bones as you age.
Protein Powder Side Effects
- Since protein powders are dietary supplements, the FDA leaves it up to manufacturers to evaluate the safety and labeling of products.
- Some proteins, particularly dairy-based ones, may cause digestive distress. People with dairy allergies or trouble digesting lactose can experience gastrointestinal discomfort if they use a milk-based protein powder.
- Protein powders often have gut-disrupting gums and fillers, as well as added sugars or artificial sweeteners, many of which are carcinogenic.
Creatine is an amino acid found in your body’s muscles and in your brain. Though it can be made synthetically, most people get creatine through seafood and red meat. The body’s liver, pancreas and kidneys also make creatine.
Creatine is one of the best supplements for building lean body mass and increasing athletic performance.
Here’s proof …
|1. Increase power and anaerobic running capacity. |
2. Build lean mass.
3. Decrease fatigue.
Is Creatine Safe?
- When used orally at appropriate doses, creatine is likely safe to take for up to five years. However, there is concern that creatine taken in high doses is possibly unsafe and could damage the liver, kidneys or heart.
- Creatine can cause: Muscle cramping, Nausea, Diarrhea, Dizziness, Gastrointestinal pain, Dehydration, Weight gain, Water retention, Heat intolerance, Fever
- Don’t take creatine if you have a history of kidney disease or you have conditions such as diabetes that increase the risk of kidney problems. There also is some concern that creatine might increase mania in people who have bipolar disorder.
- Many drugs might interact with creatine and increase the risk of kidney damage. Possible drug interactions include: Nephrotoxic drugs, Caffeine and Ephedra. Combining caffeine with creatine might decrease the efficacy of creatine. Combining caffeine with creatine and the supplement ephedra might increase the risk of serious side effects, such as stroke.
Beta–alanine is a non-essential amino acid that is produced naturally in the body.
While beta alanine hasn’t been studied as much as creatine, there’s some compelling evidence about the effects of beta-alanine on body composition:
|1. Improve exercise performance (particularly HIIT). |
2. Stimulate lean body mass growth.
Is Beta Alanine Safe?
- Beta-alanine may interact with some heart medications and with drugs for erectile dysfunction.
- Its safety has not been established for children, people with particular diseases or conditions, or for women who are pregnant or breastfeeding.
- Err on the safe side and talk to your doctor before you take beta-alanine.
The Best Supplements for Anxiety, Relaxation, and Sleep
Ashwagandha is a plant that has been used in Ayurvedic medicine for thousands of years.
It’s one of the most effective adaptogens and may also provide neuroprotection and enhance athletic performance.
|1. Reduce anxiety and stress levels. |
2. Increase power output.
Is Ashwagandha Safe?
- Ashwagandha is probably safe when taken by mouth short-term. The long-term safety of ashwagandha is not known. Large doses of ashwagandha might cause stomach upset, diarrhea, and vomiting.
- Pregnancy and breast-feeding: Do not use ashwagandha if you are pregnant. There is some evidence that ashwagandha might cause miscarriages. Not enough is known about the use of ashwagandha during breast-feeding. Stay on the safe side and avoid use.
- Diabetes: Ashwagandha might lower blood sugar levels. This could interfere with medications used for diabetes and cause blood sugar levels to go to low.
- High or low blood pressure: Ashwagandha might decrease blood pressure. This could cause blood pressure to go to low in people with low blood pressure; or interfere with medications used to treat high blood pressure.
- Stomach ulcers: Ashwagandha can irritate the gastrointestinal (GI) tract. Don’t use ashwagandha if you have a stomach ulcer.
- “Auto-immune diseases” such as multiple sclerosis (MS), lupus (systemic lupus erythematosus, SLE), rheumatoid arthritis (RA), or other conditions: Ashwagandha might cause the immune system to become more active, and this could increase the symptoms of auto-immune diseases. If you have one of these conditions, it’s best to avoid using ashwagandha.
- Surgery: Ashwagandha may slow down the central nervous system. Healthcare providers worry that anesthesia and other medications during and after surgery might increase this effect. Stop taking ashwagandha at least 2 weeks before a scheduled surgery.
- Thyroid disorders: Ashwagandha might increase thyroid hormone levels. Ashwagandha should be used cautiously or avoided if you have a thyroid condition or take thyroid hormone medications.
- Possible Drug Interactions
- Medications that decrease the immune system (Immunosuppressants).
- Sedative medications (Benzodiazepines).
- Sedative medications (CNS depressants).
The following haven’t been studied as much as ashwagandha but preliminary evidence suggests these can also help ease anxiety:
Lemon balm is a perennial herb from the mint family. The leaves, which have a mild lemon aroma, are used to make medicine.
According to several small studies, it does appear effective at inducing calmness and reducing anxiety:
|1. Reduce anxiety. |
2. Increase sense of calm.
Is Lemon Balm Safe?
Lemon balm is likely safe for most people. When taken by mouth, lemon balm can cause some side effects including increased appetite, nausea, vomiting, abdominal pain, dizziness, and wheezing.
When applied to the skin, lemon balm may cause skin irritation and increased cold sore symptoms.
Special precautions should be taken for the following conditions:
- Pregnancy and breast-feeding: Not enough is known about the use of lemon balm during pregnancy and breast-feeding. Stay on the safe side and avoid use.
- Diabetes. Lemon balm might lower blood sugar levels in people with diabetes. Watch for signs of low blood sugar (hypoglycemia) and monitor your blood sugar carefully if you have diabetes and use lemon balm.
- Surgery: Lemon balm might cause too much drowsiness if combined with medications used during and after surgery. Stop using lemon balm at least 2 weeks before a scheduled surgery.
- Thyroid disease: Don’t use lemon balm. There is a concern that lemon balm may change thyroid function, reduce thyroid hormone levels, and interfere with thyroid hormone-replacement therapy.
- Possible Drug Interactions: Sedative Medications (CNS depressants). Lemon balm might cause sleepiness and drowsiness.
Reishi, also known as ganoderma lucidum or lingzi mushroom, is frequently used in traditional Chinese medicine. Its popularity extends to Japanese and Korean medicine, and it has been making its way west.
Reishi has anti-oxidative/anti-stress effects and also has a therapeutic effect on insulin resistance, reduces the risk of prostate cancer, and can help treat a variety of conditions associated with metabolic syndrome.
On top of that, the lingzi mushroom is well known for its anti-cancer effects. It is able to activate natural killer cells, increasing their activity and the body’s ability to fight tumors, and reduces the chances of metastasis, which is when cancer spreads to another part of the body, in certain types of cancers.
|1. Reduce anxiety and stress levels. |
2. Improve subjective well being.
3. Reduce fatigue.
4. Slows development of certain types of cancer.
Is Reishi Safe?
Reishi mushroom may cause side effects including dryness of the mouth, throat, and nasal area along with itchiness and rash, stomach upset and diarrhea, dizziness and headache, nosebleed, and bloody stools.
Special precautions should be taken for the following conditions:
- Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking reishi mushroom if you are pregnant or breast feeding. Stay on the safe side and avoid use.
- Bleeding disorder: High doses of reishi mushroom might increase the risk of bleeding in some people with certain bleeding disorders.
- Low blood pressure: Reishi mushroom might lower blood pressure. There is a concern that it might make low blood pressure worse. If your blood pressure is too low, it is best to avoid reishi mushroom.
- A clotting disorder called thrombocytopenia: High doses of reishi mushroom might increase the risk of bleeding in people with thrombocytopenia. If you have this condition, do not use reishi mushroom.
- Surgery: High doses of reishi mushroom might increase the risk of bleeding in some people if used before or during surgery. Stop using reishi mushroom at least 2 weeks before a scheduled surgery.
Possible Drug Interactions
- Medications for diabetes (Antidiabetes drugs). Reishi mushroom might decrease blood sugar.
- Medications for high blood pressure (Antihypertensive drugs. Reishi mushroom might decrease blood pressure in some people. Taking reishi mushroom along with medications for high blood pressure might cause your blood pressure to go too low.
- Medications that slow blood clotting (Anticoagulant / Antiplatelet drugs). High doses of reishi mushroom might slow blood clotting. Taking reishi mushroom along with medications that also slow clotting might increase the chances of bruising and bleeding.
I felt compelled to give an honorable nod to CBD because everybody’s talking about it.
CBD, also known as cannabidiol, is a compound derived mainly from hemp plants (which are cousins of the marijuana plant–so it does not cause a “high” like THC found in marijuana).
With the passage of the 2018 U.S. Farm Bill, as long as CBD is extracted from hemp and grown by licensed farmers in accordance with state and federal regulations, it is now legal to purchase.
And according to the World Health Organization, it’s safe:
In humans, CBD exhibits no effects indicative of any abuse or dependence potential…. To date, there is no evidence of public health related problems associated with the use of pure CBD.World Health Organization
Although research is preliminary, it appears CBD has some legit benefits, the strongest scientific evidence being for its effectiveness in treating some of the cruelest childhood epilepsy syndromes, such as Dravet syndrome and Lennox-Gastaut syndrome (LGS), which typically don’t respond to antiseizure medications.
A study from the European Journal of Pain showed showed that CBD applied on the skin could help lower pain and inflammation due to arthritis. Another study demonstrated the mechanism by which CBD inhibits inflammatory and neuropathic pain, two of the most difficult types of chronic pain to treat.
More study in humans is needed in this area to substantiate the claims but its effects appear to be very promising.
The Bottom Line About Supplements
1. Do your homework. Make sure whatever supplement you’re thinking about taking has been studied for safety and efficacy. Examine.com and Pubmed are good sources.
2. Talk to your doctor before taking any new supplement. Especially if you have pre-existing health conditions.
3. Listen to your body. If a supplement makes you feel better, keep taking it. If it doesn’t, stop taking it.