ProMix Nutrition Iron (Heme Iron Polypeptide) Review

Promix Iron is a heme iron supplement from Promix Nutrition, sold on the product page under the name Iron (Heme Iron Polypeptide). Each capsule contains 11mg of 100% porcine derived heme iron. The page says this form of iron is the most bioavailable form of iron, with a 10x higher absorption, while also being easy on the gut. The product is listed under the best for claim of aiding red blood cell health and mood. The stated benefits are that it supports optimal iron levels, improves mood health and energy, and aids cardiovascular fitness. The directions say to take one capsule daily in the morning or as directed by a medical professional, with or without food. The page states that absorption is not impacted by vitamin C, dairy, coffee, or tea. The product is marketed with a range of clean label claims, including no glyphosate, no gums, no gluten, no soy, no meds, no hormones, no GMOs, no fillers, and no artificial anything. The page also describes the product as all natural and athlete tested. Promix states that it is a member of One Percent for the Planet. Purchase options on the page include a one-time purchase at $39 and a subscription option at $31.20 with 20 percent savings, delivered every 90 days. Subscribers get free shipping, free gifts on select subscription months, and the ability to pause or cancel anytime through their account. The page says the product is HSA and FSA eligible and that customers can save an average of 30 percent using those accounts. A 90 day money-back guarantee applies to one product per order, with terms available on the refund policy page. The page also offers a bundle with Zinc Balance and D3 (5,000 IU) plus K2 at a 10 percent saving on the total. Customer ratings shown on the page average 4.9 out of 5 from 23 reviews, and the written reviews are hosted on Junip. The page does not list a full ingredients panel in the text provided, so the complete supplement facts are not reproduced here. Users are advised to follow the directions and consult a medical professional where needed, as the page itself recommends taking the product as directed by a medical professional. The product is presented as a simple daily capsule for people seeking to support iron levels, energy, and mood, with the page emphasising absorption and digestive comfort as its main points of difference.

Product Focus: EnergyAlso covers:BrainMuscles
Tier ⓘ
Tier 4 · Rank 30
Tier 4 · Emerging. A promising mechanism or animal data, with thin human evidence so far. Rank 30 within Tier 4 for Energy; 91 of 130 overall. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
52 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
98% of 47
Biohacker Mentions
5 of 10
Cost per month
$26 at 2 servings

Study, Trial or Testing Result Summary

Members Only45 human studies · 31 improved

21 of these 45 human studies gave iron by drip or injection, not by mouth.

45 human studies31 improved9 no effect18,117 people studied

Iron eases tiredness mainly in people who are low in iron. Members are told to take two servings a day, which counts as a full dose; iron worked in studies at 27 milligrams a day. A 2025 review of 18 studies with 1408 children, teens and menstruating adults without anemia found iron reduced fatigue and improved well-being and memory, but the benefit disappeared when people with normal iron were included [1]. A 2018 review of 18 trials with 1170 iron-deficient adults found less self-reported fatigue but no better measured fitness [2]. In 198 menstruating women with low iron stores and fatigue, 80 milligrams of iron daily for 12 weeks reduced fatigue more than placebo [3]. In 290 tired, iron-deficient women, one iron infusion reduced fatigue in 65.3% versus 52.7% on placebo after 8 weeks [4]. Two 2024 reviews of over 4000 new mothers with anemia found iron given into a vein eased fatigue more than iron pills [5][6]. Most of this research used iron in general rather than this heme form, and much of it used infusions, not capsules. People who already have normal iron levels should not expect more energy. Animal and cell studies are never counted.

See all 45 studies →Hide the studies

Review Totals and Summary

Members Only47 reviews · 98% positive
47 reviews · Promixnutrition 23
98% positive0% neutral2% negative

Across the stores, ProMix Nutrition Iron (Heme Iron Polypeptide) has about 24 ratings, and the written feedback is very positive. Every starred review gives 4 or 5, and the praise centres on gentle digestion and better energy. No reviewer reports a negative experience. This summary covers the capsules only. Reviews of other forms of the product, where present, were left out. **What buyers say it did for them:** Many describe more energy and less fatigue. One says it "gives energy, allows one to stay in body mentally," and another reports "a clear improvement in energy over time." Several people with low iron or anaemia say it worked where other supplements had not. One says they "used to require iron infusions" and that this "takes care of my problem." Another reports ferritin rising from 17 to 60 after a month at three capsules a day, with symptoms such as insomnia, restless legs and palpitations as the reason they started. Another, with a history of very low ferritin, says it was the best they had found. One reviewer is still waiting to see results, calling themselves "hopeful." **What buyers complain about:** Very little. No reviewer criticises taste, smell or pill size. The only criticism is price, covered below. One reviewer notes it may not work faster than a doctor-prescribed iron, but chose it because side effects had made them skip doses on the prescribed one. Most reviews are short, and one store page's summary has only a single written review. **Taste, smell, pill size or form:** The reviews do not discuss these. The one detail on form is that one reviewer took three capsules a day for a month, and another plans to drop to a couple a week once levels are up. **Value for money:** Opinion is mixed but accepting. One reviewer says it absorbs "three times better" than pharmacy iron pills but "cost three times more," and leaves the choice to the reader. Another says the total cost was considerably cheaper than an iron infusion in the UK. Neither calls it poor value. **Who it seems to suit:** The strongest fit is people who got constipation, cramps or stomach upset from ordinary iron pills. One says "No digestive issues or constipation like every iron supplement has always caused me." Another says "Iron pills usually mess with my stomach but these do not." Several like being able to take it on an empty stomach, and one reports improved gut health. It also appeals to people with anaemia or iron deficiency, including a reviewer who had struggled with heavy periods for 25 years. Several say they have kept taking it, or plan to. **Who it did not suit:** no reviewer reports it failing for them. Anyone choosing mainly on price should note it costs more than pharmacy iron, and the evidence of results comes mostly from short-term use.

Biohacker Summary

Members Only5 of 10 recommend it
5 of 10 biohackers on our panel recommend it

The panel is split on iron but leans toward it: four of the ten recommend it, one uses it, and the rest are neutral, warn, or stopped. Those in favor take it for energy, thyroid function, brain health, muscle recovery, hair, and pregnancy, and they stress testing first and replenishing only when levels are low, with women of reproductive age singled out as a group that may need it. On forms, several point to heme iron from red meat or liver as the best absorbed, and one panelist takes 10 milligrams of heme iron, though he later stopped after years of supplements and meat failed to raise his levels. Several warn that too much iron is risky, linking it to inflammation, aging, and heart disease, and one says supplements should not be taken aggressively without proper testing; two of them would rather get iron from food than from supplements. Thyroid support is the one pairing mentioned, with selenium and iodine assessed alongside iron.

See all 10 biohackers →Hide the biohackers
  • Dr. Eric Berg · Iron · warns
    • 7 Nov 2026 · warns · Facebook ↗
      Warns against iron supplements, suggesting instead to get iron from red meat or liver.
    • 7 Nov 2026 · neutral · Instagram ↗
      Dr. Berg states that when nutrients like iron are too low, fatigue and weakness can follow.
    • 4 Nov 2026 · warns · YouTube ↗
      Does not recommend taking iron supplements or cooking in iron skillets because the body has no mechanism of getting rid of iron unless one donates blood or is a menstruating female.
    • 30 Oct 2026 · neutral · YouTube ↗
      Identifies iron as the Achilles' heel of cancer, as it is needed for its DNA to replicate.
    • 18 Oct 2026 · neutral · YouTube ↗
      Mentions that grass-fed liver has heme iron, the most bioavailable form of iron that prevents anemia.
    • 10 Oct 2026 · warns · Podcast ↗
      Dr. Berg warns that too much iron can be damaging to the body and advises focusing on food sources to avoid overconsumption.
    • 3 Oct 2026 · warns · YouTube ↗
      Warns that too much iron, especially the ferrous sulfate or fumarate type found in many supplements, is corrosive and oxidizing, can mess with the liver, and create inflammation, noting that males have no natural way to excrete excess iron.
    • 27 Sep 2026 · neutral · X ↗
      Notes that tannins in tea bind iron, blocking its absorption.
    • 10 Sep 2026 · neutral · Instagram ↗
      Mentions that vertical ridges on nails could indicate an iron deficiency.
    • 7 Sep 2026 · neutral · Instagram ↗
      Discusses iron deficiency and the concern of excess iron accumulation in the body, noting that iron comes from naturally iron-rich foods and can be added to processed foods and supplements.
  • Thomas DeLauer · Iron · recommends
    • 2 Nov 2026 · recommends · YouTube ↗
      Recommends giving any iron intervention a couple of months before deciding if it works, and suggests increasing heme iron through red meat or liver intake.
    • 18 Sep 2026 · neutral · Facebook ↗
      Compares iron content in spinach (2.7mg) and beef (2.6mg), but emphasizes that beef's heme iron absorbs at about 25%, while spinach's non-heme iron absorbs at 2-8%.
    • 24 Aug 2026 · recommends · YouTube ↗
      Recommends iron from meat, specifically red meat and beef liver, stating that it is a crucial part of the mechanistic triad for thyroid hormone function and is iron-dependent for iodine incorporation into thyroid hormone.
    • 6 Jun 2026 · neutral · YouTube ↗
      Notes that iron is essential for delivering oxygen to muscles and the brain, making it an important cofactor for signals to reach their targets.
    • 4 Jun 2026 · recommends · YouTube ↗
      Recommends assessing iron along with selenium and iodine for optimal thyroid function, suggesting red meat as a source of iron.
    • 30 May 2026 · recommends · YouTube ↗
      Recommends getting heme iron from real food sources like organ meats, red meats, or pumpkin seeds, and warns against iron supplements due to potential oxidation and issues with copper levels.
    • 1 Apr 2026 · warns · YouTube ↗
      Warns against overdoing iron supplementation unless truly needed, especially if ferritin levels are high, as ferroptosis is iron-dependent and excess iron can increase ferroptotic risk.
    • 8 Mar 2026 · recommends · YouTube ↗
      Recommends good quality heme iron from food sources like liver and beef for preventing insulin resistance and type 2 diabetes, supporting glucose control, and energy regulation, but warns against iron supplements.
    • 25 Feb 2026 · neutral · YouTube ↗
      States that iron status is critical for white matter development and maintenance, noting that anemic individuals tend to have a loss of white matter structure, which is common in women during perimenopausal transition.
    • 18 Nov 2025 · warns · YouTube ↗
      Warns that polyphenols in coffee can bind to iron, making it useless. He recommends taking iron supplements upon waking on an empty stomach, potentially with vitamin C, and waiting 30-60 minutes before consuming coffee or tea.
  • Dr. Mark Hyman · Iron · neutral
    • 29 Oct 2026 · neutral · YouTube ↗
      States that iron helps red blood cells carry oxygen, and a deficiency can make one feel like they are running on low power mode.
    • 21 Oct 2026 · neutral · YouTube ↗
      Mentions iron as an existing biomarker that plays a role in mental health, which Function Health includes in their measurements.
    • 31 Aug 2026 · neutral · YouTube ↗
      Notes that a woman patient had very low iron.
    • 20 Aug 2026 · recommends · YouTube ↗
      States that they get the whole picture when it comes to iron, looking at ferritin, iron reserves, iron in the blood, iron saturation, and iron binding capacity to spot problems before full-blown anemia.
    • 10 Jun 2026 · neutral · YouTube ↗
      Mentions iron as an example of a common nutritional deficiency.
    • 3 Jun 2026 · neutral · YouTube ↗
      Notes that many Americans are deficient in iron, which affects mood and brain function.
    • 18 May 2026 · recommends · Instagram ↗
      Recommends testing Iron as a biomarker before training for fitness.
    • 24 Apr 2026 · neutral · YouTube ↗
      States that low iron, specifically a ferritin level less than 45, is a big hidden cause of insomnia, affecting up to half the population.
    • 24 Sep 2025 · uses · YouTube ↗
      Mentions that they check iron levels as part of evaluating mental illness biomarkers.
    • 30 Jul 2025 · recommends · YouTube ↗
      Recommends carefully looking at iron, thyroid, and cortisol levels as they all play a role in affecting cognitive function and mental health.
  • Siim Land · Iron · neutral
    • 14 Oct 2026 · neutral · Instagram ↗
      Mentions that iron is a mineral necessary for making collagen.
    • 3 Sep 2026 · warns · YouTube ↗
      States that excess iron promotes oxidative stress and inflammation, which increases heart disease risk.
    • 24 Mar 2026 · neutral · YouTube ↗
      Notes that iron deficiency is found in children with premature graying of hair and that some people get gray hair due to iron deficiency.
    • 8 Feb 2026 · recommends · YouTube ↗
      Recommends ensuring sufficient iron intake, especially during pregnancy and early life, to prevent mental developmental and cognitive issues.
    • 5 Jan 2026 · neutral · YouTube ↗
      States his iron level is 103 micrograms per deciliter, which he considers a good result, and advises that men should aim for lower iron levels to reduce the risk of heart disease and aging.
    • 28 Dec 2025 · warns · YouTube ↗
      Places iron in the 'junk tier', warning that high iron levels are associated with heart disease, mortality, and liver disease, and advises caution with supplementation, especially for men with high iron.
    • 3 Dec 2025 · warns · YouTube ↗
      Warns that high iron levels are associated with increased risk of mortality and reduced lifespan, and that iron in excess is bad for maximum longevity. He states that iron levels slightly on the lower end, around 60 to 90 micrograms per deciliter, are associated with the lowest mortality risk, and that iron below 45 and above 145 micrograms per deciliter is associated with increased risk of mortality.
    • 20 Sep 2025 · warns · YouTube ↗
      Warns that very high iron levels can cause damage to the endothelium and increase the risk of heart disease, especially in men who accumulate iron more easily.
    • 8 Sep 2025 · warns · TikTok ↗
      Warns that too much iron can damage blood vessels, though people with low iron status are safe.
    • 23 Aug 2025 · warns · YouTube ↗
      Theorizes that Brian's lower iron status and hemoglobin status, possibly due to his plant-based diet and lack of iron supplementation, limits his V2 max.
  • Andrew Huberman · Iron · recommends
    • 20 Jul 2026 · recommends · YouTube ↗
      States that Iron is one of the critical nutrients with the best evidence for cognitive function and reducing the risk of dementia.
    • 30 Oct 2025 · warns · YouTube ↗
      Warns that excess iron will increase the number of senescent cells in the body, which accumulate as people get older and cause inflammation and cancer. He notes that people who are healthy and have a fairly vegetarian diet often have slightly low iron levels but super amounts of energy.
    • 14 Apr 2025 · neutral · YouTube ↗
      Notes that about 50% of the population is iron deficient.
    • 31 Mar 2025 · neutral · Instagram ↗
      Mentions that the podcast will review the role of iron in treating depression.
    • 31 Mar 2025 · warns · YouTube ↗
      States that B12, folate, and iron are essential to mitochondrial function and if deficient, mitochondria will not function properly, which is consistent with the mitochondrial theory of neuropsychiatric disorders.
    • 22 Jul 2024 · recommends · YouTube ↗
      Advises women concerned with low ferritin to take an iron supplement every other day for 10 days, starting on the first day of their bleed, to maximize absorption.
    • 10 Apr 2023 · neutral · Podcast ↗
      Discusses the role of iron in hair growth.
    • 27 Dec 2021 · warns · YouTube ↗
      Warns that excess iron, especially as a supplement, can accelerate the aging process by increasing senescent cells in the body.
    • Date not recorded · recommends · Website ↗
      Agrees with Mark Hyman that iron is a basic supplement, but warns older men against taking too much due to iron toxicity, while menstruating women need more.
    • Date not recorded · recommends · Website ↗
      Recommends that women concerned with low ferritin take an iron supplement every other day, starting at the first day of their bleed, for ten days, to allow for better absorption.
  • Ben Greenfield · Iron · recommends
    • 9 Jul 2026 · recommends · YouTube ↗
      Recommends testing for and replenishing iron if levels are low, as it can affect the ability to maintain or preserve muscle, especially for those on GLP-1s.
    • 29 May 2026 · neutral · Facebook ↗
      Notes that one can eat iron-rich foods or supplement with iron, but still feel exhausted if iron is not the missing piece, emphasizing that focusing on a single mineral in isolation can support a number on a lab test rather than the system itself.
    • 6 May 2026 · neutral · X ↗
      Mentions iron as a common deficiency.
    • 16 Apr 2026 · recommends · YouTube ↗
      Recommends a nutritious diet including iron, as it is critical for brain development.
    • 7 Jan 2026 · recommends · YouTube ↗
      Notes that the guidelines mention iron supplementation for infancy and early childhood.
    • 26 Nov 2025 · uses · Facebook ↗
      Started thinking about getting more heme-based iron in his diet after a podcast about reasons people feel fatigue.
    • 22 Nov 2025 · stopped · YouTube ↗
      Warns that modern society has flipped the narrative on iron intake, leading people to consume excessive amounts (20-50 mg) through an iron-fortified diet, which the body cannot assimilate, leading to storage in tissues and disrupting iron physiology, contributing to aging.
    • 19 Apr 2025 · recommends · YouTube ↗
      Notes that some people need to supplement with iron, recommending iron biscinate as a form that doesn't irritate the gut.
    • 3 Apr 2025 · warns · YouTube ↗
      Explains that 10X can pinpoint genetic variations that predispose some people to absorbing too much iron and will adjust the iron content in their supplement, potentially reducing or removing it entirely.
    • 26 Dec 2024 · neutral · TikTok ↗
      Covers iron as a key supplement for kids.
  • Bryan Johnson · Iron · stopped
    • 8 Jul 2026 · stopped · YouTube ↗
      Has had low iron for 11 years and despite eating meat and trying all forms of iron supplementation at different times and sequences, none of it worked to raise his iron or ferritin levels.
    • 7 Jul 2026 · uses · X ↗
      Had low iron for 11 years, with ferritin averaging 38 ng/mL, and has finally boosted it back to healthy levels.
    • 26 Sep 2023 · uses · YouTube ↗
      Takes 10 milligrams of heme iron to get his iron levels up, as they are borderline.
    • Date not recorded · recommends · Website ↗
      Recommends adequate Iron for hair health, noting it is in the Blueprint stack.
    • Date not recorded · recommends · Source ↗
      Recommends supplementing with iron for brain health for both the mother and the baby during pregnancy.
  • Dave Asprey · Iron · warns
    • 24 Jun 2026 · warns · X ↗
      Warns that if a doctor diagnoses anemia, one should not assume they just need more iron, as low hemoglobin doesn't always mean low iron and the issue can sometimes be how well the body is using iron.
    • 16 Jun 2026 · neutral · Facebook ↗
      Notes that when energy intake is too low for training demand, nutrient intake often falls short, especially for iron, which is associated with impaired recovery.
    • 19 Mar 2026 · recommends · YouTube ↗
      Recommends ensuring iron levels are good as it is a cofactor that can help thyroid function, especially with conversion issues.
    • 15 Aug 2025 · recommends · YouTube ↗
      Egg yolks, particularly raw egg yolks, fatty cuts of meat, choline sources like that, making sure there's enough iron and a lot of the micro minerals, trace minerals, things like that. Those would be really important for bone marrow because mineral deficiencies are going to block that at the start.
    • 8 May 2025 · warns · YouTube ↗
      Warns that both too much and not enough iron can trash the body, highlighting the complex interactions between iron and copper.
    • 11 Apr 2025 · neutral · YouTube ↗
      States that iron really helps in maintaining hair growth.
    • 29 Mar 2025 · warns · YouTube ↗
      States that many vegans don't get enough iron, which slows metabolism and makes it harder to build muscle.
    • 4 Aug 2024 · warns · YouTube ↗
      Warns that low iron in women leading up to and through the first 30 weeks of pregnancy can result in the baby having a lower IQ and being more likely to have ADHD and demyelination issues.
    • 2 Aug 2024 · recommends · YouTube ↗
      Advises taking iron and calcium separately because they will bind together.
    • 1 Aug 2024 · recommends · YouTube ↗
      Advises getting iron levels up through diet and supplementation, and to take iron and calcium separately because they will bind together.
  • Dr. Rhonda Patrick · Iron · uses
    • 4 May 2026 · uses · YouTube ↗
      Recently found out he needed to get on an iron supplement and noticed he gets less sore in his training after taking it.
    • 22 Jan 2026 · recommends · YouTube ↗
      Advises that menstruating women should ensure they are getting enough iron.
    • 28 Apr 2025 · warns · YouTube ↗
      Warns that iron is not an innocuous supplement and should not be taken aggressively without proper testing, as it can be complicated and has significant downsides if levels are not understood.
    • 25 Aug 2020 · recommends · YouTube ↗
      Dr. Patrick explains that breast milk is incredibly low in iron, and by six months, infants can develop iron deficiency anemia, so pediatricians recommend introducing iron-rich complementary foods at that time.
    • 5 Apr 2017 · warns · YouTube ↗
      Rhonda discusses Dr. Lithgow's work on how excess dietary iron affects protein homeostasis in worms, noting that increased iron levels in the diet accelerated aging and the accumulation of insoluble proteins.
    • Date not recorded · uses · Website ↗
      Dr. Patrick takes some iron during menstruation.
    • Date not recorded · warns · Website ↗
      Increased iron levels in the brain worsen cognitive test performance by as much as 10% in older adults, a phenomenon linked to brain atrophy and decline in memory and attention.
    • Date not recorded · neutral · Website ↗
      Iron plays a central role in health across the lifespan. It forms the core of hemoglobin, the molecule in red blood cells...
    • Date not recorded · neutral · Website ↗
      The requirement for iron is 1.8 times higher for vegetarians.
    • Date not recorded · recommends · Website ↗
      The findings highlight the importance of proper nutrition during development and suggest that iron supplementation may be beneficial, especially during adolescence.
  • Peter Attia · Iron · recommends
    • 8 Jun 2025 · recommends · YouTube ↗
      Recommends iron supplements for women of reproductive age who are iron deficient.
    • 9 Sep 2024 · neutral · YouTube ↗
      Notes that deficiencies in certain vitamins and minerals, such as iron, can be a cause of hair loss in women.
    • 8 Apr 2024 · neutral · X ↗
      Delves into the crucial yet often overlooked topic of iron and iron deficiency.
    • 8 Apr 2024 · neutral · YouTube ↗
      Explains that humans consume about 10 to 20 milligrams of iron per day, absorbing roughly 10% of that, which is 1 to 2 milligrams per day, perfectly offsetting the 1 to 2 milligrams lost daily.
    • 8 Apr 2024 · recommends · Podcast ↗
      Peter emphasizes the importance of consuming an adequate amount of iron daily to prevent deficiency.
    • 23 Jan 2020 · neutral · YouTube ↗
      Speculates that lower iron levels in women due to their menstrual cycle may offer a protective benefit against heart disease, citing data that metabolically deranged men benefit from therapeutic phlebotomy.

RAL Summary

Members OnlyTier 4 for Energy

Human studies show iron reduces fatigue in people who are low in iron (31 of 45 studies improved) [2][3], but with 47 reviews there are not yet enough to rank it higher.

Take 2 servings a day (2 capsules) to match the dose that worked in the studies.

  • Emerging: not enough evidence to rank higher yet.

Where the evidence disagrees: 9 of the 45 human studies found no effect.

More Details

Members OnlyBody systems · Combine with · Possible side effects

Body systems: Blood, Nervous system, Muscular system

Combine with: To support iron absorption and energy metabolism, pair heme iron with vitamin C, which enhances iron uptake, and with vitamin B12 and folate, which are needed for healthy red blood cell formation. Vitamin B6 and copper also support iron utilization and hemoglobin synthesis. If the underlying aim is adrenal or stress support, consider adding adaptogens like ashwagandha or rhodiola, along with vitamin B5 (pantothenic acid) and magnesium, but take these separately from the iron if possible. Avoid taking iron with calcium, coffee, tea, or high-dose zinc, which can reduce absorption. Check ferritin and iron levels with a healthcare provider before long-term use.

Possible side effects: No major side effects reported. Reviewers say it caused none of the constipation or stomach upset they had with other iron pills.

Supplement Facts

Iron 11 mg
Supplement Facts
Serving Size 1 Capsule
Servings Per Container 90
Amount Per Serving% Daily Value
Iron11 mg

Other ingredients: Bovine Gelatin (Capsule), Non-GMO Hypoallergenic Plant Fiber.

Directions: Take 1 capsule daily in the morning or as directed by a medical professional with or without food. Absorption is not impacted by vitamin C, dairy, coffee, or tea.¹

Barcode (UPC) 850039239953 · Label source: Reverseagelab · Report a label change

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Graded November 11, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.