Seredyn Review 2019 – Benefits & Side Effects

SeredynWhat is Seredyn

Seredyn is a nutritional supplement advertised as a scientifically proven formula for reducing anxiety while increasing confidence and feelings of control and relaxation. The company behind Seredyn is BioNeurix Corporation.

According to its website, BioNeurix is specialized in developing and distributing cutting-edge formulations that set new standards within the nutraceuticals industry concerning potency, safety, and purity. The manufacturer has been activating in this field since 2002 and commercialized a total of three formulations.

Seredyn is marketed as a proprietary formula reported by 90% of the users as effective in relieving feelings of stress and anxiety. Still, this claim is not the conclusion of a clinical trial, so it should not be regarded as scientific proof of Seredyn potency.

Seredyn Ingredients

Seredyn contains the following ingredients: Niacinamide 200 mg, Magnesium (as Magnesium Taurinate) 14 mg, and Seredyn Proprietary Blend (Passion Flower Extract standardized to 4% flavonoids, Valerian Root Extract standardized to 0.8% valerenic acid, SunTheanine as L-Theanine, and Taurine) 480 mg

Inactive ingredients: Magnesium Stearate, Gelatin Capsule, Rice Flour powder, and Silicon Dioxide.

Benefits of Seredyn

According to BioNeurix, Seredyn is a very fast acting supplement useful for treating occasional anxiety. The official source claims that over 65% of the patients that took the supplement have allegedly reported beneficial effects after the first 30 minutes from its administration.

The important thing to remember here is that Seredyn, although marketed as scientifically based, it not the subject of any clinical trial or scientific research. The claim is partially true as the active ingredients have been studied in numerous such trials (links towards some of these are available on the official page of the product).

The main active ingredients in Seredyn include a potent vitamin, a mineral and a proprietary blend of Valerian, Passionflower, and L-Theanine.

L-Theanine is a powerful amino acid found in large amounts in the green tea. Being an amino acid, L-Theanine is of particular importance due to its ability to cross the blood-brain barrier. The compound works by lowering the levels of mental and physical stress while improving mood and cognitive function. A lot of research involving this constituent has been made, some of which supports the claims listed above. However, further research is required to reach a conclusion.

It appears that the substance is likely safe even when used in larger doses. However, the combination of a brain nutrient with herbal extracts has been shown to alter its properties and reduce its ability to cross the BBB. Although we cannot know for certain that it is also the case of this formula, it is something that consumers should consider before using it.


Another popular ingredient present in the formula is the Valerian extract. Seredyn contains a standardized extract of Valerenic acid, which is one of the active chemicals responsible for its sedative effects. The Valerian root is a very well-known traditional remedy for restlessness and sleeping problems. It is considered generally safe, but unwanted side effects such as dizziness, headache, and insomnia were reported. Larger doses are not recommended before driving or operating heavy machinery (because of the drowsiness usually associated with consumption of Valerian). A proper dosage has not yet been established.

Seredyn is claimed as safe for the majority of users. If side effects occur (and these may include drowsiness, fatigue, stomach upset, morning grogginess, and low blood pressure), they tend to be mild and disappear after a while. This is, however, a claim based on non-scientific online surveys conducted by the producer.

How Much Does Seredyn Cost?

Each bottle of Seredyn contains 60 capsules and based on the recommended dose of two capsules per day, one bottle should be enough for a full month of treatment. The maximum recommended daily dose is six capsules which would place the product in the moderately-high priced category. In this case, a total of three bottles would be necessary to ensure a month’s supply.

60-day money back guarantee is available for unsatisfied clients after fulfilling certain conditions detailed by the manufacturer on the product’s page. Seredyn is available for online purchasing directly from the manufacturer’s website as well as numerous other online retailers.

Potential Seredyn Side Effects

According to the official website, many people that take Seredyn experience no side effects. When side effects occur, they tend to be mild and often go away.

Potential Seredyn side effects include fatigue, stomach upset, drowsiness, headache, restlessness, lower blood pressure, morning grogginess (if taken before bed), and an increased effect of sedative drugs.


  • Seredyn is quite popular and it might be a good alternative to dangerous prescription drugs
  • An amino-acid is included in the formula which is an indication that the brain will receive a big part of the nutrients (as amino-acids have the ability to cross the BBB)
  • There are numerous reviews available about the formula (not only on the official page but also on other online sources)
  • The formula comes with a 60-day money-back guarantee


  • The formula as a whole is not the subject of any clinical trial, making its effectiveness debatable
  • The combination of herbal extracts and amino-acids may reduce the latter’s ability to produce benefits on the brain
  • An important percentage of consumers seem to report ineffectiveness of the formula and even the occurrence of unwanted reactions (headaches, insomnia, etc.)

Final Verdict

The information available on the Seredyn official website is a good source of documentation for everyone who is interested in finding more about this product. The links towards numerous webpages of clinical studies and clinical trials involving the active ingredients can be accessed directly from the official page. Still, there is no evidence of such a trial involving the entire formula or the exact combination of active ingredients.

More so, it should be noted that official sites tend to be subjective and focus more (if not solely) on the advantages. This is why we firmly recommend further researching the formula (particularly its potential unwanted effects or drug interactions) by accessing external sources and even by talking with a specialized physician.

Seredyn’s numerous positive testimonials and success stories available on the dedicated website may be another trap for an inexperienced consumer. Although there are also positive reviews on other specialized websites and forums, it is recommended to read these testimonials for getting the complete picture.
And finally, as Seredyn is an herbal remedy, it may be considered as an artificial approach that only offers short relief of the symptoms but masks (or fails to identify and treat) the underlying cause.

A much healthier and natural alternative to providing the brain with the right amounts of nutrients is by having a healthy diet rich in whole foods.

Check the #1 Best-Selling Brain Supplement in the USA

About Philip Gibson

Ann Olson is a freelance health writer and blogger specializing in diet reviews, sexuality education, disease awareness and healthy eating. She currently writes various health and diet articles for several websites, including eHow, and She also has a history of educating readers about mental and sexual health issues on Associated Content and Yahoo! Voices, where she was a featured health and wellness contributor.