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Pregnenolone 30 mg x 50 capsules


Serving Size 1 capsule
Amount per serving % DV
Pregnenolone 30 mg
†   Daily Value not established
Other ingredients: Microcrystalline Cellulose, Gelatin
Suggested Use: 1 to 2 capsules in the afternoon or as directed by a health care professional.
You Save$2.21 (14%)


Pregnenolone has nothing to do with being pregnant, and everything to do with well-being.

Pregnenolone is the master steroid hormone from which whole families of other hormones are made. For example, testosterone, estrogens, progesterone, and cortisone, are all derivatives of pregnenolone. But pregnenolone is also an important brain neurosteroid — a hormonal substance that is formed and accumulated in the nervous system and is active there. As such, pregnenolone is involved in learning and memory, aggression and epilepsy, and modulation of responses to stress, anxiety and depression.

Pregnenolone has a long history of use as a drug and supplement. It has been shown to have a wide range of beneficial actions for people who are sick or under stress. These include:

  • ameliorating arthritis (300 mg/day)
  • countering fatigue (50-100 mg/day)
  • generally improving the quality of life.

These effects occur after about two weeks of pregnenolone usage.

Many scientific studies provide evidence that pregnenolone can:

  • enhance memory
  • reduce stress
  • lessen depression
  • control ‘bipolar disorder’
  • reduce schizophrenic symptoms.

Read Pregnenolone Monograph

Pregnenolone is a prohormone used by the body to produce other steroid hormones, such as testosterone, estrogens, progesterone, cortisone, and many others.1 But pregnenolone is also an important brain neurosteroid2 — that is, a hormonal substance that is both formed and accumulated in the nervous system and is active there. As such, pregnenolone is involved in learning and memory, aggression and epilepsy, and modulation of responses to stress, anxiety and depression.

What we can’t tell you

In the U.S. and some other industrialized countries, government agencies like the U.S. Food and Drug Administration have adopted censorship as a method for intensifying their control over supplement users and their suppliers. Thus, FDA regulations prohibit us from telling you that any of our products are effective as medical treatments, even if they are, in fact, effective.

Accordingly, we will limit our discussion of pregnenolone to a brief summary of relevant research, and let you draw your own conclusions about what medical conditions it may be effective in treating.


Before it was pushed aside by the promotion of other hormones, pregnenolone had been shown to have a wide range of beneficial actions for people who were sick or under stress. These included ameliorating arthritis, countering fatigue, and generally improving the quality of life.2

Experiments in the 1940s showed that 50-100 mg/day of pregnenolone given to factory workers resulted in improved production rates, less fatigue, and an increase in happiness and well-being. Pilots reported also reported less fatigue and an improved ability to fly airplanes. These effects occurred after about two weeks of pregnenolone usage.2

Also during the 1940s, rheumatoid arthritis was successfully treated with pregnenolone. At 300 mg/day for 40 days patients experienced “a significant decrease in joint pain, tenderness, and spasticity, with improved strength and range of motion”.2

In the 1950s, however, a raft of new stimulants, painkillers and anti-inflammatories hit the market, and pregnenolone simply got swept into the backwaters of the pharmaceutical world as the medical profession got caught up in the excitement of new drugs and the money they bring in. It was later discovered that the long-term use of these newer drugs led to serious side effects, but by then pregnenolone had become an unfashionable research topic.

During the past two decades, however, pregnenolone and its sulfate ester have been receiving renewed attention. Many scientific studies give strong experimental support to claims that pregnenolone can be used to enhance memory and reduce stress. There is also evidence that it lessens depression,3 controls ‘bipolar disorder’,4,3 and reduces schizophrenic symptoms5.


The term ‘neurosteroid’ was introduced in the 1980s to refer to pregnenolone and other steroids that can be produced in the brain. Since then, hundreds of studies have been published about these substances and their potential value as treatments for psychiatric illnesses.

Pregnenolone is made from cholesterol in many tissues of the body besides the brain.6 Pregnenolone is the master steroid hormone from which whole families of other hormones are made, including the corticoids, androgens, estrogens, and progestins.1

When pregnenolone is taken orally much of it is absorbed from the digestive tract. Some of it is immediately converted to pregnenolone sulfate which dissolves in the circulating blood, some of it remains unconverted and is thought to be transported in the blood by a carrier protein. When it reaches the brain, some of the circulating pregnenolone and pregnenolone sulfate passes through the blood-brain-barrier into the nervous system,78 Hence, oral supplements of pregnenolone can elevate the concentrations of pregnenolone and pregnenolone sulfate in the brain beyond what the brain would do on its own. whereupon further conversion of pregnenolone to its sulfate is carried out.


Experiments have clearly shown that pregnenolone is a powerful stimulator of memory formation.9 So strong is the effect that significant memory-enhancing effects have been seen in mice when just a few dozen molecules of pregnenolone sulfate are injected into certain regions of the brain.10

But does pregnenolone really enhance memory when you take it orally? Incredible as it may seem, neither the medical research establishment nor the supplement industry has bothered to do a clinical study and publish the results. The studies that were performed and published in the 1940s showed definite improvements in mental functions, but they did not specifically measure memory enhancement.

One study of memory enhancement is said to have been done recently at the St. Louis School of Medicine, USA: 500 mg pregnenolone or a placebo were given to volunteers three hours before they performed standard memory tests. “Pregnenolone resulted in improved memory in both men and women, improved spatial memory and perception in men, and improved verbal recall memory in women.”2 The work, however, has not been published in a medical journal.

But we do not have to wait for formal studies to be done before we can reap the memory benefits which pregnenolone presumably has to offer — this supplement is available, affordable, and safe to use in the amounts that are typically recommended for memory enhancement: 50 to 500 mg/day.


Studies in patients with anxiety disorders have shown that higher anxiety levels correlate with lower pregnenolone levels in the blood.11,12 More to the point, experiments with mice demonstrated that when pregnenolone sulfate is administered directly to the brain, anxiety symptoms decrease.13,14 But at very high doses (10 to 100 times the effective dose), mice experienced increased anxiety.

The one published clinical study that has been done in humans used very low oral doses of pregnenolone (15-30 mg/day) and showed no effects on anxiety,15 thereby establishing a lower bound on the effective dose range. In view of the studies on mental function done in the 1940s, these results suggest that anxiety therapy using pregnenolone may require doses in the range of 50-200 mg/day.

Depression and manic-depression (‘bipolar disorder’)

It was reported in 1994 that patients with bipolar disorder have depressed pregnenolone levels in their cerebrospinal fluid.3 Since then, dozens of studies have been performed in mice and rats in an effort to understand how neurosteroids affect brain function. Many investigators have concluded that these substances hold great promise as treatment options for psychiatric illnesses, including depression and bipolar disorder.16,1718 Yet, to the discredit of the psychiatric profession, only one clinical trial has been conducted to test this concept and the results have not been published.

Fortunately, the snail’s pace at which the medical world moves is no obstacle to people who want to use pregnenolone. They can easily and safely buy pregnenolone and try it for themselves, and many do — in the U.S. at least, where the right of individuals to buy it is protected by an act of Congress.20


Researchers investigating the detailed mechanism by which pregnenolone influences brain function consider pregnenolone a promising treatment for schizophrenia, drug abuse and dementia.16

In a clinical trial conducted in 2005, schizophrenia patients were given pregnenolone for 8 weeks in escalating doses from 100 to 500 mg/day. During the trial the researchers reported that patients “who have been on the higher dose (500 mg/d) have felt better, with an improved sense of energy. Even when blinded to treatment, high-dose patients have asked to remain on pregnenolone.” But the results of the study remain unpublished as of 2007.5

Schizophrenia is a complex illness for which the causal factors may vary somewhat from one patient to another. One would expect that optimum treatments would vary somewhat also. Pregnenolone may be a useful therapy for some patients and not for others. It would be nice to have some clinical data to use as a guide, but the psychiatric profession’s lack of interest in exploring ‘outside the box’ makes it unlikely that we will have this data any time soon. Schizophrenia patients must therefore try pregnenolone on their own if they want an answer to the question “Is pregnenolone right for me?”


Are pregnenolone supplements useful for the conditions and purposes mentioned above? We aren’t allowed to tell you, so you should take a look at some of the references cited here, and then decide for yourself.

Review articles

A clear, non-technical overview of pregnenolone as a supplement is the one by PDR Health.1 A slightly more technical discussion of pregnenolone and its relationship to other steriods is available in the Wikipedia.19 The article on the Intelegen website offers a broad perspective.2

Warning: Pregnenolone should be avoided by those who are at risk for hormonally related cancers, or who are lactating or pregnant.

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