Evidence-graded guideReviewed October 31, 2026

Best Supplements and Herbs for Muscle Growth and Recovery, Ranked by Evidence

The supplement with the best evidence for muscle growth is creatine monohydrate, and it is not close: more than 500 human trials show it adds roughly 1 to 2 kg of lean mass and 5 to 10 percent more strength over a training block compared with placebo. After creatine, the picture gets much more modest. Citrulline and beetroot (nitrate) improve training volume and reduce soreness in several RCTs, omega-3 fats speed recovery and may protect muscle during inactivity, and vitamin D only helps the people who are low. Everything else on this page is Moderate or Preliminary, and we say so.

This guide is for healthy adults who train with weights or do hard endurance work and want to know what is worth buying. Two things matter more than any item below: eating roughly 1.6 g of protein per kg of bodyweight per day, and progressive resistance training three or more times a week. No capsule replaces either. Protein powder is food, not a supplement in the sense used here, so it is covered in the lifestyle section rather than ranked.

See a clinician rather than a supplement if you are losing muscle without trying, especially over 60 (sarcopenia has medical causes worth ruling out), if you have kidney disease and are considering creatine, if you have low testosterone symptoms such as low libido and fatigue, or if a muscle injury is not improving after two weeks of rest. Teenagers should talk to a doctor or sports dietitian before using any of these.

Quick answer

  • Creatine monohydrate — adds about 1–2 kg lean mass and 5–10% strength in hundreds of RCTs; 3–5 g/day
  • Citrulline malate — 6–8 g before training increases reps to failure and reduces soreness in meta-analyses
  • Beetroot (nitrate) — improves power output and time to exhaustion; the natural pre-workout with the best data
  • Omega-3 (EPA/DHA) — lowers post-exercise soreness and preserves muscle during immobilisation at 2–3 g/day
  • Vitamin D — restores strength in people who are deficient (below 20 ng/mL); no effect if replete
  • Ashwagandha — modest gains in bench press and squat strength over 8–12 weeks in small RCTs

The 10 best herbs and supplements for muscle growth and recovery

Ranked by the strength of human evidence. Strong = multiple trials or a meta-analysis. Moderate = a few small trials. Preliminary = early or animal data.

  1. Creatine monohydrate

    Strong evidence

    Creatine is the most studied sports supplement in existence. A 2022 meta-analysis of 35 RCTs found creatine plus resistance training added about 1.1 kg of lean mass more than training alone, and older meta-analyses show 5 to 10 percent greater gains in one-rep max and more reps per set. It works by raising muscle phosphocreatine stores, which lets you squeeze out extra reps, and it also seems to blunt muscle loss during injury or bed rest. It is safe in healthy kidneys at the usual doses over years of follow-up.

    Key evidence
    International Society of Sports Nutrition position stand (2017) and 2022 meta-analysis of 35 RCTs on lean mass
    Studied dose
    Loading: 20 g/day split into 4 doses for 5–7 days, then maintenance 3–5 g/day; or skip loading and take 3–5 g/day (saturates in about 4 weeks)
    Best for
    Anyone lifting weights; also older adults trying to hold onto muscle
    Cautions
    Expect 1–2 kg of water weight in the first fortnight. Check with a clinician first if you have kidney disease or take nephrotoxic drugs (NSAIDs daily, some antivirals); stop if you get unusual cramps or swelling. Creatine can raise serum creatinine without harming the kidneys, so tell your doctor before blood tests.
    Full Creatine monohydrate profile

  2. L-citrulline / citrulline malate

    Moderate evidence

    Citrulline converts to arginine in the kidneys and raises nitric oxide more reliably than taking arginine itself. A 2021 meta-analysis of 13 RCTs found citrulline supplementation increased reps to failure in resistance exercise by a small but consistent margin, and a separate meta-analysis of 8 trials found it reduced muscle soreness 24 and 48 hours after training. Effects are modest and show up mainly in high-rep sets rather than one-rep max.

    Key evidence
    2021 meta-analysis of 13 RCTs on resistance exercise performance (Vårvik et al.)
    Studied dose
    6–8 g citrulline malate (2:1) or 3–6 g L-citrulline, 60 minutes before training
    Best for
    High-volume lifters and people who want a stimulant-free pre-workout
    Cautions
    Lowers blood pressure slightly; combine carefully with blood-pressure drugs or PDE5 inhibitors (sildenafil). Doses above 10 g can cause stomach upset.
    Full L-citrulline / citrulline malate profile

  3. Beetroot (dietary nitrate)

    Moderate evidenceBeta vulgaris

    Beetroot juice provides nitrate, which the body converts to nitric oxide and which lowers the oxygen cost of exercise. A 2018 meta-analysis of 76 trials found dietary nitrate improved time to exhaustion by about 4 percent, and a 2020 meta-analysis of 19 trials found it increased muscle power output, with the largest effects in recreational rather than elite athletes. It also lowers systolic blood pressure by around 4 mmHg.

    Key evidence
    2018 meta-analysis of 76 trials on exercise performance (McMahon et al.)
    Studied dose
    300–600 mg nitrate (about 70–140 mL concentrated beetroot shot or 500 mL juice) 2–3 hours before training; daily for a week works better than a single dose
    Best for
    Endurance work, HIIT and anyone who wants a food-based pre-workout
    Cautions
    Avoid antibacterial mouthwash around dosing, which kills the oral bacteria that activate nitrate. Adds to blood-pressure drugs and nitrates for angina. Red urine and stools are harmless. High oxalate, so caution with a history of kidney stones.
    Full Beetroot (dietary nitrate) profile

  4. Omega-3 (EPA and DHA)

    Moderate evidence

    Fish oil does not build muscle on its own, but it helps recovery. A 2020 meta-analysis of 12 RCTs found omega-3 reduced delayed-onset muscle soreness and markers of muscle damage (creatine kinase) after eccentric exercise. Trials of 2–4 g/day in older adults found modestly greater strength gains from resistance training, and a 2-week immobilisation study in young women found fish oil roughly halved the loss of muscle in the casted leg.

    Key evidence
    2020 meta-analysis of 12 RCTs on muscle soreness and damage markers
    Studied dose
    2–3 g/day combined EPA + DHA with food, for at least 4 weeks before it matters
    Best for
    People who are sore for days after sessions, or recovering from injury
    Cautions
    Mild antiplatelet effect: discuss with your doctor if you take warfarin, apixaban or clopidogrel, and stop a week before surgery. Can cause fishy burps and loose stools at 3 g or more.
    Full Omega-3 (EPA and DHA) profile

  5. Vitamin D3

    Moderate evidenceCholecalciferol (D3)

    Vitamin D is a conditional pick. A 2017 meta-analysis of 7 RCTs found supplementation improved upper and lower limb strength, but the gain was concentrated in people who started deficient (25-OH-D below 20 ng/mL, about 50 nmol/L). In replete athletes, high-dose vitamin D does nothing for strength or muscle size. Deficiency is common in indoor trainers, people with darker skin and anyone north of 40 degrees latitude in winter, so the first step is a blood test.

    Key evidence
    2017 meta-analysis of 7 RCTs on muscle strength (Tomlinson et al.)
    Studied dose
    1,000–2,000 IU/day D3 with a fatty meal if deficient; recheck 25-OH-D after 3 months
    Best for
    Anyone with a documented low level, or who trains indoors through winter
    Cautions
    Doses above 4,000 IU/day without testing can push calcium too high over time. Interacts with thiazide diuretics and digoxin via calcium. Skip if you have sarcoidosis or hyperparathyroidism unless supervised.
    Full Vitamin D3 profile

  6. Ashwagandha

    Moderate evidenceWithania somnifera

    Two 8-week RCTs in untrained men found 300 mg twice daily of a root extract (KSM-66) increased one-rep bench press by about 20 kg more than placebo and squat by about 10 kg more, with greater arm muscle size and lower creatine kinase. A 12-week trial in recreational lifters using 600 mg/day found similar strength gains and lower cortisol. These are small, mostly industry-funded trials, so treat the effect sizes as optimistic.

    Key evidence
    2015 RCT of 57 men, 8 weeks, KSM-66 300 mg twice daily (Wankhede et al.)
    Studied dose
    300 mg twice daily of a root extract standardised to withanolides, 8–12 weeks
    Best for
    Lifters who also have high stress or poor sleep holding back recovery
    Cautions
    Rare liver injury reports, so stop if you notice dark urine or jaundice. Can raise thyroid hormone and add to sedatives; avoid in pregnancy and with autoimmune thyroid disease unless supervised. Pause before surgery.
    Full Ashwagandha profile

  7. Tongkat ali (Eurycoma longifolia)

    Preliminary evidenceEurycoma longifolia

    Tongkat ali is marketed as a natural testosterone booster. A 2022 meta-analysis of 5 RCTs found it raised total testosterone meaningfully only in men who started with low levels or were older, and the trials measuring strength are tiny. A 5-week study of 200 mg/day in older adults found small increases in handgrip strength and muscle mass. The evidence for muscle growth in young, healthy men is thin.

    Key evidence
    2022 meta-analysis of 5 RCTs on testosterone (Leitão et al.)
    Studied dose
    200–400 mg/day of a standardised root extract (often 1–2% eurycomanone), 4–12 weeks
    Best for
    Men over 50 with borderline testosterone, after a blood test
    Cautions
    Some products have been found adulterated with sildenafil or mercury; buy third-party tested. May raise blood pressure and interfere with blood-sugar drugs. Not for pregnancy or hormone-sensitive conditions.
    Full Tongkat ali (Eurycoma longifolia) profile

  8. Rhodiola rosea

    Preliminary evidenceRhodiola rosea

    Rhodiola is an adaptogen with better data for fatigue than for muscle. A handful of small trials found a single 200 mg dose improved time to exhaustion by about 3 percent and lowered perceived exertion, and a 2023 systematic review concluded it may reduce muscle damage markers and improve antioxidant status after hard exercise. There is no good evidence it adds muscle mass or strength directly.

    Key evidence
    2023 systematic review of 10 trials on exercise performance and recovery
    Studied dose
    200–400 mg/day of a root extract standardised to 3% rosavins and 1% salidroside, taken in the morning or 1 hour pre-workout
    Best for
    Overtrained or mentally fatigued athletes rather than people chasing size
    Cautions
    Mildly stimulating; avoid late in the day and with MAOIs or SSRIs without advice. May lower blood pressure and blood sugar. Not studied in pregnancy.
    Full Rhodiola rosea profile

  9. Curcumin (turmeric extract)

    Moderate evidenceCurcuma longa (isolated curcuminoids)

    Curcumin reduces inflammation, and several small RCTs show that translates into less soreness. A 2021 meta-analysis of 11 trials found curcumin supplementation lowered post-exercise muscle soreness and creatine kinase, with the clearest effect when taken for a few days before and after a damaging bout. The trials used bioavailable forms, as plain turmeric powder is barely absorbed. It does not increase muscle growth and may slightly blunt training adaptation if taken in large doses all the time.

    Key evidence
    2021 meta-analysis of 11 RCTs on exercise-induced muscle damage
    Studied dose
    500–1,000 mg/day of a bioavailable curcumin extract (with piperine or in a phytosome form), for 2–3 days before and up to 4 days after hard sessions
    Best for
    Short-term use around races, competitions or unusually heavy sessions
    Cautions
    Antiplatelet: caution with warfarin, aspirin and NSAIDs. Can trigger gallbladder contraction, so avoid with gallstones. Rare liver signals with high-dose bioavailable forms; stop before surgery.
    Full Curcumin (turmeric extract) profile

  10. Collagen peptides

    Preliminary evidence

    Collagen is for tendons more than muscle. A 2019 RCT found 15 g/day of collagen peptides plus resistance training produced slightly greater fat-free mass gains than placebo in young men, but the effect may be from extra protein. Better evidence exists for connective tissue: 15 g collagen plus vitamin C before training increased collagen synthesis markers, and a 24-week trial found it reduced activity-related joint pain in athletes.

    Key evidence
    2019 RCT in 57 young men, 12 weeks, 15 g/day (Kirmse et al.)
    Studied dose
    10–15 g/day hydrolysed collagen with 50 mg vitamin C, about 1 hour before training
    Best for
    People with cranky tendons or joints that limit training volume
    Cautions
    Collagen is low in leucine, so it is a poor substitute for whey or a complete protein. Generally well tolerated; mild fullness or bloating at high doses.
    Full Collagen peptides profile

How to choose

  • If you only buy one thing, buy creatine monohydrate. Plain monohydrate powder costs pennies per day and outperforms every fancier form (HCl, buffered, ethyl ester) in head-to-head trials. Loading is optional; 3–5 g daily gets there in a month.
  • If you want a natural pre-workout, use beetroot shot or citrulline 1–2 hours before training. Both work without caffeine, and you can add 100–200 mg caffeine (one strong coffee) if you tolerate it; caffeine has stronger performance data than most of this list.
  • If soreness is what limits you, omega-3 daily plus curcumin around hard sessions is the best-supported combination. Give omega-3 at least 4 weeks before judging.
  • If you are over 50 or train indoors, test vitamin D before buying anything else on the list except creatine. Deficiency quietly caps strength gains and is cheap to fix.
  • If stress and sleep are wrecking recovery, ashwagandha has reasonable 8–12 week data and addresses the cortisol side, which no other pick does.
  • Skip testosterone boosters unless a blood test shows you are low. Tongkat ali only moves the needle in men who start deficient, and most lifters under 40 are not.

What to skip

BCAA powders

If you eat enough protein, extra branched-chain amino acids add nothing: a 2017 review found BCAAs alone cannot stimulate muscle protein synthesis because the other essential amino acids are missing. Whey or a complete protein does the same job better.

Testosterone boosters (tribulus, fenugreek blends, D-aspartic acid)

Tribulus has repeatedly failed to raise testosterone or strength in trained men, and D-aspartic acid at 6 g/day actually lowered testosterone in one 2015 trial. Fenugreek has small, mixed results and no convincing muscle data.

Glutamine

Despite its popularity, glutamine does not improve strength, muscle mass or body composition in healthy trained people in any well-run trial. The gut-health claims come from clinical nutrition in burns and critical illness, not gyms.

HMB for trained lifters

HMB (beta-hydroxy-beta-methylbutyrate) is not in our library, but it deserves a mention: it helps untrained beginners and older adults a little, yet trials in experienced lifters show negligible gains, and the one study reporting huge effects has not been replicated.

Safety and when to see a clinician

  • See a clinician if you are losing muscle or strength without a change in training, have unexplained swelling, cola-coloured urine after exercise (possible rhabdomyolysis), or persistent weakness, before you reach for supplements.
  • Creatine is safe for healthy kidneys, but anyone with chronic kidney disease, a single kidney or on nephrotoxic drugs should get medical advice first and be monitored. Stay well hydrated during loading.
  • Blood thinners: omega-3, curcumin and high-dose vitamin E all add antiplatelet effects. Tell your prescriber if you take warfarin, DOACs, aspirin or clopidogrel, and stop these a week before surgery.
  • Blood-pressure drugs: beetroot, citrulline and rhodiola each lower blood pressure a little; combined with medication they can cause dizziness. Diabetes drugs: tongkat ali and rhodiola may lower blood sugar.
  • Ashwagandha has rare but real liver-injury reports and can push thyroid hormone up; stop and get bloods checked if you notice fatigue, itching, dark urine or yellow eyes. Avoid it in pregnancy.
  • Pre-workout blends are the most frequently adulterated category of supplements, with undeclared stimulants and sildenafil found repeatedly. Buy single ingredients from brands with third-party testing (Informed Sport, NSF Certified for Sport).

What matters as much as any herb

  • Protein: about 1.6 g per kg of bodyweight per day, spread over 3–4 meals of 25–40 g each, is the dose above which more protein stops adding muscle in meta-analyses. Whey, milk, eggs, meat, fish, soy and legumes all work; this matters more than every pick above combined except creatine.
  • Progressive overload: muscle grows in response to sets taken close to failure, roughly 10–20 hard sets per muscle per week, with the load or reps rising over time. No supplement rescues a programme that is not progressing.
  • Sleep: a single week of 5-hour nights lowered testosterone by 10–15 percent in young men, and sleep restriction shifts weight loss from fat to muscle. Aim for 7–9 hours.
  • Energy balance: you cannot build much muscle in a large deficit. A small surplus of 200–300 kcal/day for beginners, or maintenance for experienced lifters, is enough.
  • Deload and rest: muscle protein synthesis stays elevated for 24–48 hours after a session; train each muscle 2–3 times a week rather than once with crushing volume.

Frequently asked questions

What is the single best supplement for muscle growth?

Creatine monohydrate. It has more than 500 human trials, adds roughly 1–2 kg of lean mass and 5–10 percent more strength over a training block, and costs very little. Nothing else on the market comes close in evidence quality.

Do I need to load creatine?

No. Loading (20 g/day for 5–7 days) saturates the muscle in a week; 3–5 g/day gets to the same place in about 4 weeks with less bloating. Once saturated, the results are identical.

What is the best natural pre-workout?

Beetroot (nitrate) or citrulline, taken 1–3 hours before training, has the best stimulant-free data for power and training volume. Adding 100–200 mg caffeine from coffee gives a further, well-documented boost if you tolerate it.

Which herbs help muscle recovery?

Curcumin has the best recovery data among herbs, cutting soreness and creatine kinase after damaging exercise in a meta-analysis of 11 trials. Ashwagandha lowers post-training muscle damage markers in two RCTs, and rhodiola may reduce perceived fatigue. Omega-3, while not a herb, outperforms all three for soreness.

Does ashwagandha really build muscle?

Two 8–12 week RCTs found meaningful strength and arm-size gains in untrained men taking 600 mg/day of root extract. The trials were small and mostly funded by the manufacturer, so the real effect is probably smaller, but it is one of the few herbs with any direct strength data.

Is creatine bad for your kidneys?

Not in healthy people. Long-term studies up to 5 years at 5–10 g/day show no change in kidney function. Creatine does raise serum creatinine, which can look like a kidney problem on a blood test, so tell your doctor you take it. People with existing kidney disease should ask first.

How much protein do I need to build muscle?

About 1.6 g per kg of bodyweight per day, which is roughly 110–130 g for a 75 kg person. Meta-analyses show gains plateau above that, so there is little point going past 2.2 g/kg. Spread it over three to four meals.

References

  1. Kreider RB et al.. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. Journal of the International Society of Sports Nutrition (2017)View source
  2. Vårvik FT, Bjørnsen T, Gonzalez AM. Acute citrulline malate supplementation and high-intensity resistance exercise performance: a systematic review and meta-analysis. International Journal of Sport Nutrition and Exercise Metabolism (2021)
  3. McMahon NF, Leveritt MD, Pavey TG. The effect of dietary nitrate supplementation on endurance exercise performance in healthy adults: a systematic review and meta-analysis. Sports Medicine (2017)
  4. Wankhede S et al.. Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. Journal of the International Society of Sports Nutrition (2015)View source
  5. Tomlinson PB et al.. Effects of vitamin D supplementation on upper and lower body muscle strength levels in healthy individuals: a systematic review with meta-analysis. Journal of Science and Medicine in Sport (2015)
  6. Morton RW et al.. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength. British Journal of Sports Medicine (2018)View source
  7. Lv ZT et al.. Omega-3 fatty acid supplementation and muscle soreness/damage after exercise: a systematic review and meta-analysis. Frontiers in Physiology (2020)
  8. Leitão AE et al.. Eurycoma longifolia (Tongkat ali) as a potential testosterone booster: a systematic review and meta-analysis. Complementary Therapies in Clinical Practice (2021)
  9. Dietary Supplements for Exercise and Athletic Performance: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements (2024)View source
  10. Creatine. Examine.com research summaryView source

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This guide is educational and is not medical advice. Herbs and supplements can interact with prescription medicines and are not regulated like drugs. Talk with a clinician or pharmacist before starting anything new, especially if you are pregnant, breastfeeding, have a chronic condition, or take medication.