Designs for Health Inositol Synergy, 120 Capsules Review
A synergistic blend of myo-inositol and D-chiro-inositol formulated to support healthy insulin function, metabolic health, and hormone balance, particularly for women's health.
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Study, Trial or Testing Result Summary
Members Only10 human studies · 6 improved
This product gives 2.2 grams of inositol a day, more than the 600 milligrams that worked in studies. The evidence for inositol and thyroid health is mixed, and most studies paired it with selenium, which this product does not contain. In 168 people with Hashimoto's thyroiditis, six months of myo-inositol plus selenium lowered thyroid-stimulating hormone and thyroid antibodies and raised thyroxine compared with selenium alone [1]. In 40 women in the menopausal transition, myo-inositol alone lowered thyroid-stimulating hormone [2]. One pooled analysis found selenium plus inositol lowered thyroid-stimulating hormone and raised thyroxine but did not change antibodies [3]. Another found inositol, alone or with selenium, did not clearly lower thyroid antibodies [4]. A 12 month study adding 600 milligrams of inositol to selenium lowered thyroid-stimulating hormone by 38 percent [5]. The product also has 100 milligrams of alpha lipoic acid, but the studied dose is unknown. In one three week trial of 40 women with a mildly underactive thyroid, it lowered a marker of oxidative stress and improved blood vessel widening, but thyroid hormones were not measured [6]. Animal and cell studies are never counted.
See all 10 studies →Hide the studies
- In a pooled analysis of people with thyroid disorders, selenium plus inositol lowered thyroid-stimulating hormone and raised thyroxine, but did not significantly change triiodothyronine or thyroid antibody levels.Investigating the effect of combined use of selenium and Myo-inositol supplements on thyroid function and autoimmune cha…
- In a pooled analysis of 10 studies of people with Hashimoto's thyroiditis, six months of myo-inositol, alone or with selenium, did not clearly lower thyroid antibodies, while selenium alone did.Effects of different supplements on Hashimoto's thyroiditis: a systematic review and network meta-analysis.
- In a review of drugs reused for benign thyroid nodules, myo-inositol with selenium showed promise in single studies or case reports, but evidence was limited.Drug Repurposing for Reducing the Size of Benign Thyroid Nodules: A Systematic Review.
- In 168 people with Hashimoto's thyroiditis and mildly underactive thyroid, six months of myo-inositol plus selenium, compared with selenium alone, lowered thyroid-stimulating hormone and thyroid antibodies, raised free thyroxine and improved quality of life.Myo-inositol plus selenium supplementation restores euthyroid state in Hashimoto's patients with subclinical hypothyroid…
- In 40 menopausal-transition women, six months of myo-inositol (2 g twice daily) lowered thyroid-stimulating hormone, which the authors took to suggest improved thyroid function.Myo-inositol and melatonin in the menopausal transition.
- In 40 women with mild underactive thyroid, 3 weeks of alpha-lipoic acid lowered a blood marker of oxidative stress and improved blood vessel dilation (from about 3.9% to 4.8%) while the untreated group did not change.Alpha-lipoic acid improves endothelial dysfunction in patients with subclinical hypothyroidism.
- In people with bipolar disorder on lithium and healthy controls, 11 days of dietary inositol did not change thyroxine or thyroid-stimulating hormone levels.The effects of lithium discontinuation and the non-effect of oral inositol upon thyroid hormones and cortisol in patient…
- A single oral dose of D-pinitol, a form of inositol, did not change thyroid-stimulating hormone levels in healthy adult volunteers.Pharmacokinetics and Endocrine Effects of an Oral Dose of D-Pinitol in Human Fasting Healthy Volunteers.
- In 21 adults with newly diagnosed autoimmune thyroiditis but normal thyroid function, taking myo-inositol with selenium twice daily for six months lowered thyroid-stimulating hormone levels and thyroid antibody levels, but the study had no control group.Myo-inositol and selenium reduce the risk of developing overt hypothyroidism in patients with autoimmune thyroiditis.
- In patients with Hashimoto's thyroiditis, adding 600 mg a day of myo-inositol to selenium over 12 months lowered thyroid-stimulating hormone by 38%, earlier than selenium alone, while untreated patients' levels rose.Role of selenium and myo-inositol supplementation on autoimmune thyroiditis progression.
Review Totals and Summary
Members Only478 reviews · 81% positive
Designs for Health Inositol Synergy, 120 Capsules earns mostly positive feedback across a range of review platforms, with many users reporting noticeable benefits after taking the supplement consistently. The most frequently mentioned theme is its effectiveness for mood, stress management, and overall well-being, especially for those dealing with mild anxiety or looking for additional support with emotional balance. Several reviews highlight improved sleep quality and better relaxation, often commenting that they feel calmer and more focused during daily routines. Some people also report using this product as part of a broader approach to hormonal health, though comments on specific conditions are less frequent. The capsules themselves are generally described as easy to swallow, and users rarely mention any strong aftertaste or digestive discomfort, which is seen as a plus compared to other supplements. Taste does not appear to be a significant issue, as most reviewers are neutral or satisfied in this area. Quality is another recurring theme, with numerous customers expressing trust in the Designs for Health brand and the perceived purity and consistency of the capsules. Many repeat buyers say they return to this supplement because of its reliability and the subtle yet meaningful improvements they notice over time. While the majority of experiences are positive, there are still a notable number of neutral and negative reviews. Some users mention that the effects are mild or take several weeks to become apparent, leading to mixed feelings about the product’s value for the price. Others simply don’t notice significant changes and describe their experience as neither particularly good nor bad. Among the less satisfied reviewers, a few report minimal to no benefit and express frustration after finishing the bottle without experiencing the results they had hoped for. A small percentage of people raise concerns over the cost, feeling that the price is a bit high, especially given their subjective results. However, negative side effects are rarely mentioned, suggesting that most users tolerate the formula well. Aggregating these reviews, Designs for Health Inositol Synergy, 120 Capsules stands out for helping many people support their mood and sense of calm, with quality and easy usability highlighted frequently. The product seems to be dependable for regular users, though a minority do not find it particularly effective for their needs. Overall, it maintains a strong reputation for satisfaction within its category, especially for those who respond well to its benefits, though expectations around results and value do vary.
Biohacker Summary
Members Only4 of 10 recommend it
Inositol is the main ingredient here, and most of the panel uses or recommends it, with only a few staying neutral. The most common reason is sleep: five of them take about 900 mg before bed, one has her usual scoop in water at night, and one takes about 5 grams in water at night. Others mention calming mental chatter, easing anxiety during the day, better blood sugar and insulin response, and egg quality and fertility, where one panelist cites a range of 1 to 5 grams per day. Myo-inositol is the form named most often, and one panelist mentioned D-chiro inositol for insulin sensitivity. One panelist notes it is not strongly evidenced as a sleep aid, another says its effects on blood sugar and cholesterol are not massive, and one recommends it for OCD, Hashimoto's and eye floaters. No one said they stopped taking it, and none gave a specific pairing.
See all 9 biohackers →Hide the biohackers
Dr. Mark Hyman · Inositol · recommends
- Lists inositol as a supplement that helps balance neurotransmitters and can help lower anxiety or depression symptoms.
- Takes 900 mg of Inositol before bed for sleep.
- Takes 900 mg of Inositol before bed for sleep.
- Takes 900 mg of inositol before bed for sleep.
- Takes 900 mg of inositol before bed for sleep.
- Takes 900 mg of inositol before bed for sleep.
- Recommends inositol for fertility.
- Recommends inositol, considered a B vitamin, for brain and mood function and anxiety, found in oranges, grapefruit, chickpeas, lentils, almonds, peanuts, and leafy greens.
- Added a combination product with myo-inositol and D-chiro-inositol to a young woman's regimen, which helps improve insulin sensitivity and cell signaling.
- Personally started taking myoinositol over a year ago and finds it very helpful for sleep architecture, inducing and maintaining sleep, and quieting the autonomic nervous system. She recommends starting with 1 gram a day and titrating based on symptoms.
Andrew Huberman · Inositol · neutral
- Discusses Myo-Inositol as a tool for middle-of-the-night waking.
- Discusses Myo-inositol as a supplement that can impact serotonin.
- Has been taking 900 mg of myo-inositol every third night or so to test its ability to improve sleep, finding the depth and quality of sleep to be remarkable.
- Takes 900 mg of Inositol before bed for sleep.
- Mentions inositol as a nutraceutical that can be used for bipolar disorder.
- Personally takes 900 mg of myo-inositol every third night or so to improve sleep and for its anti-anxiety effect during the day, but not for bipolar disorder.
- Mentions Inositol as a nutraceutical for OCD.
- Highlights myoinositol, stating that 900 milligrams or higher dosages can improve sleep and reduce anxiety, and suggests more systematic exploration of nutraceuticals like inositol for OCD treatment, especially in combination with behavioral therapies.
- Takes 900 mg of Inositol before bed for sleep.
- Mentions inositol for PCOS, stating it decreases insulin resistance and offers a huge benefit.
Ben Greenfield · Inositol · neutral
- Notes that inositol has solid research behind it for fertility.
- Recommends Inositol at 1 to 5 grams per day for women, noting its involvement in FSH signaling and citing trials showing fewer immature oocytes and more high-quality embryos in women undergoing IVF.
- He discusses inositol for female fertility.
- Myo-inositol has the same insulin-sensitivity mechanism as in men and is tied to egg quality.
- Mentions Inositol with a dose of 1-5 grams/day.
- Takes 900 mg of Inositol before bed for sleep.
- Now uses myo-inositol as a natural strategy instead of a med and as a natural insulin-sensitizer.
- Recommends Myo-inositol as a strong evidence-backed supplement for insulin resistance and PCOS, suggesting a dose of around 2g a couple of times a day.
- He takes 900 mg of Inositol before bed for sleep.
- Takes 900 mg of Inositol before bed for sleep.
Siim Land · Inositol · neutral
- States that Inositol has been shown to improve blood sugar and insulin sensitivity.
- States that Inositol has a key role in glucose metabolism and that grapefruit is one of the richest sources of it.
- He takes 900 mg of Inositol before bed for sleep.
- He takes 900 mg of inositol before bed for sleep.
- Describes Inositol as interesting, noting it is sweet-tasting like glycine and found in grapefruit, and that it lowers blood sugar and cholesterol, though the effects are not massive.
- Likes inositol, stating it helps with neurotransmitters, mood, and blood sugar regulation, placing it in the 'good tier'.
- Used to take inositol in the past but no longer does, as he has already tested most supplements.
- Recommends Inositol, stating that it helps with neurotransmitters, mood, and blood sugar regulation.
- Discusses Inositol as a supplement.
- Lists inositol as one of the three healthiest sweeteners that have no sugar.
Dave Asprey · Inositol · uses
- He takes 900 mg of Inositol before bed for sleep.
- Dave and Lucas break down compounds and systems discussed in the episode including solbutiamine, lithium orotate, sarcosine, inositol, uridine, testosterone, growth hormone, ketamine pathways, thyroid optimization, liver health, sleep quality, and desire regulation.
- Takes about 5 grams of inositol in water at night, noting its amazing and broad-spectrum benefits, especially for mental health.
- Uses Inositol Tris Pyrophosphate (ITPP) sublingually three times a week, taking 250 milligrams, and describes it as feeling like EPO in a capsule, massively improving endurance and mental clarity.
- Recommends utilizing myoinositol to help with sleep by balancing blood sugar.
- Began seeing that people had to have foods high in inositol because it was a nutrient important for the liver to burn fats.
Bryan Johnson · Inositol · uses
- Takes 900 mg of Inositol before bed for sleep.
- Takes 900 mg of Inositol before bed for sleep.
- Takes 900 mg of inositol before bed for sleep.
- Takes 900 mg of Inositol before bed for sleep.
- Takes 900 mg of Inositol before bed for sleep.
- Takes 900 mg of Inositol before bed for sleep.
- Takes 900 mg of Inositol before bed for sleep.
Dr. Rhonda Patrick · Inositol · uses
- Has found myo-inositol helps calm "mental chatter" before bed, although it is not strongly evidenced as a sleep aid.
- Discusses why and how much myo-inositol they took.
- Rhonda's current supplement routine includes Myo-inositol.
- Oh, I also forgot to mention that I take myo-inositol in the evening as well, a scoop of it, and that's Pure Encapsulations.
- Dr. Rhonda Patrick explores if inositol can improve sleep.
- She has been taking one scoop of myo-inositol mixed with water at night, noting a potential benefit to her sleep and its importance for reproductive health.
- She mentions myo-inositol as part of a sleep stack but has not looked into its effects for sleep in depth.
Dr. Eric Berg · Inositol · recommends
- Recommends taking inositol as part of a natural remedy for eye floaters, citing older versions of the PDR.
- Lists Myo-inositol as one of the best natural remedies for OCD.
- Suggests that myo-inositol may also be needed if one has Hashimoto's.
- Recommends myoinositol, part of the B complex, as a natural remedy for OCD, citing good randomized double-blinded control studies.
- Recommends taking myo inositol in addition to other recommendations for Hashimoto's.
- Recommends inositol hexaphosphate (IP6) as a beneficial form of phytic acid for reducing iron.
- Mentions Inositol as another good thing to take for PCOS.
- Recommends taking inositol to help with PCOS and to reset the flow of hormones after an estrogen crash from stopping birth control pills.
- Dr. Berg recommends using inositol for PCOS.
- Recommends D-chiro-inositol, a form of inositol, as it is essential for the hypothalamus-pituitary-gonad axis, helps with many female problems, and makes insulin more sensitive, which is beneficial for PCOS and infertility.
Thomas DeLauer · Inositol · neutral
- Mentions D-chiro inositol as a compound found in buckwheat that has been demonstrated to be very powerful at improving insulin sensitivity.
RAL Summary
Members OnlyTier 2 for Thyroid Health
The rules placed this at tier two because a controlled trial of 40 women with a mildly underactive thyroid found alpha lipoic acid improved oxidative stress and blood vessel function [6], and 80 percent of 488 reviews are positive. That trial did not measure thyroid hormones, and the inositol evidence is mixed and mostly tied to selenium.
Where the evidence disagrees: 3 of the 10 human studies found no effect.
More Details
Members OnlyBody systems · Combine with · Possible side effects
Body systems: Endocrine system, Immune system, Cardiovascular system
Combine with: Not compulsory.
Possible side effects: No major side effects reported.
Supplement Facts
Inositols 2.2 g · Alpha Lipoic Acid 100 mg
| Inositols (as Myo-Inositol and D-Chiro) | 2.2 g | † |
| Alpha Lipoic Acid | 100 mg | † |
Other ingredients: Cellulose (capsule), microcrystalline cellulose, vegetable stearate, silicon dioxide.
Directions: 4 capsules per day
Label source: Designsforhealth · Report a label change
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Graded October 23, 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.
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