The new and improved Pregnenolone CRT? features a controlled release technology that provides a very slow (10-12 hour) continuous release of pregnenolone in a very uniform manner, helping to eliminate the spikes, surges, and unwanted side effects found in other immediate release pregnenolone delivery systems.
This translates to a controlled delivery system that allows for convenient once-daily dosing, a feature very important in hormone precursor therapy. Pregnenelone is a hormone manufactured from cholesterol in the mitochondria whose optimal levels may have a positive effect on:
Cognitive performance
Energy levels
Mood
Skin health
Ultimately, this technology delivers optimal results by enabling pregnenolone to be released in such a way that it more closely mimics how it is released within the body.
As a dietary supplement, take one tablet daily with meals or as directed by your health care practitioner.
This product does not contain: wheat, yeast, gluten, eggs, dairy, artificial colors, flavors, sugars, or preservatives.
Read customer questions and answers about Nutrition Basics on our blog.
Potential benefits shown in research: Brain Function
neuroprotective [1]
improves memory and learning[4]
may reduce age related cognitive decline[2]
low levels correlate with depression and social phobia[6, 13]
may alleviate symptoms of Alzheimer's[4, 12]Nervous System
may support recovery from spinal injury[8]Skin Quality
may support skin hydration and collagen[10]Adrenal Exhaustion When cortisol is too low:
may reduce fatigue
may improve exercise endurance[7]Autoimmune Conditions
May improve symptoms[14, 15]Menstrual Migraines[19]
Pregnenolone is a hormone, which is normally manufactured in the body from cholesterol inside the mitochondria of many different types of cells such as brain, retina, myelin sheaths, adrenal gland, liver, skin, thymus and testes or ovaries. Pregnenolone can be converted into numerous other hormones as needed such as DHEA, progesterone, estrogens, testosterone, cortisol and aldosterone.
Pregnenolone itself has a stimulatory action on brain function but exerts many other effects through the many different hormones it converts into. Typical pregnenolone supplements, which are encapsulated powder, are absorbed like any other fat soluble substance, with the aid of bile and digestive enzymes, into the lymphatic circulation, and then to the liver before they are delivered to the blood circulation.
Possible causes of suboptimal synthesis of pregnenolone in the body may be the following:
Aging: the average daily production of pregnenolone is around 15mg in a young adult. However, by the age of 75 the pregnenolone production may be as low as 60% compared to age 30.
Pregnenolone deficiency can be assessed partially from measuring circulating pregnenolone sulfate or as salivary pregnenolone, but this may not entirely reflect potential deficiencies at the intracellular level.
Brain Function: Pregnenolone is also considered to be a neurosteroid because it is synthesized locally by the brain cells. It crosses the bloodbrain barrier, so pregnenolone from the circulation can be taken up by the brain cells when necessary. Supplementation with pregnenolone in animals and humans has shown improvements in memory or cognition and it increased mental performance under stressful conditions.[18] These effects are believed to be due to the following mechanisms:
Improves the release of the neurotransmitter acetylcholine, which may also have an application for alleviating symptoms of Alzheimer's [4,12]
Stimulates the layout of new brain connections (improved neurogenesis or neuroplasticity)[1]
Has an excitatory effect due to its affinity for two types of brain receptors: - Activates NMDA receptors - Occupies the GABA receptor sites, thus reducing the inhibitory effects of GABA or Gabanergic drugs. GABA activity is known to increase with aging, so pregnenolone may compensate for age-related increase in neuronal inhibition.
The local conversion of pregnenolone to estrogens inside the brain is believed to have a neuroprotective effect. [1] Significant amounts of pregnenolone have been found in the myelin sheaths of sciatic nerves, which suggest a role in nerve health. [11] Depression and social phobia patients have been found to have significantly lower levels of blood/cerebral spinal fluid of pregnenolone than normal subjects.[6, 13]
Autoimmune Disease: Patients with various types of autoimmune conditions such as rheumatoid arthritis, lupus, and scleroderma were found in many studies to have significantly lower blood levels of pregnenolone, DHEA, androgens and cortisol, and even lower with cortisone therapy.[15] A number of studies in the 1950's have shown that supplementation with 50-600mg/day of pregnenolone (oral or intra muscular injection) for more than a month, have brought about alleviation of their symptoms.[14, 17] Unfortunately, no studies have been done since then because of the popularity of corticosteroid therapy.
Skin Health: Studies with topical pregnenolone have shown improved skin hydration. It is conceivable that oral pregnenolone would have a similar effect since the skin tissue is very active in processing steroid hormones.[16]
Menstrual Migraines: Since these are associated with low progesterone levels, pregnenolone supplementation probably helps indirectly by improving progesterone levels commonly low in women.[19]
Dosage: Due to its stimulatory effect pregnenolone should be administered mostly during the first part of the day in order to best mimic its normal circadian production rhythm and because its excitatory action may interfere with sleep. For brain function stimulation and the correction of pregnenolone deficiency: 50-100mg/day. For autoimmune disease: 200-500mg/day oral or intra-muscular injection, under close health care supervision
Supplementation with pregnenolone should be monitored by a health care practitioner for baseline and subsequent levels of pregnenolone, testosterone, DHT, estradiol, estrone, progesterone, aldosterone and cortisol at any age for males and females due to the wide range of biochemical individuality in pregnenolone metabolism.
Who Should Not Take Pregnenolone: Due to its many possible hormonal metabolites, it is not recommended during pregnancy, lactation and hormonal sensitive cancers (breast, prostate, adrenal). Not for patients with epilepsy (history of seizures) or meningioma (noncancerous brain tumour). Pregnenolone reduces the effectiveness of any drug that stimulates the GABA receptors such as benzodiazepines. It may also negate the effect of supplementation with GABA.
References: 1. Veiga S, Garcia-Segura. Neuroprotection by the steroids pregnenolone and dehydroepiandrosterone is mediated by the enzyme aromatase. J Neurobiol. 2003 Sep 15;56(4):398-406. 2. Vallee M, Purdy RH. Neuroactive steroids: new biomarkers of cognitive aging. J Steroid Biochem Mol Biol. 2003 Jun;85(2-5):329-35. 3. Horak M, Vlcek K . Molecular mechanism of pregnenolone sulfate action at NR1/NR2B receptors. J Neurosci. 2004 Nov 17;24(46):10318-25. 4. Mayo W, Le Moal M . Pregnenolone sulfate and aging of cognitive functions: behavioral, neurochemical, morphological investigations. Horm Behav. 2001 Sep;40(2):215-7. 5. Kozubek A, Gubernator J. Liposomal drug delivery, a novel approach: PLARosomes. Acta Biochim Pol. 2000;47(3):639-49. 6. George MS, Guidotti A, Rubinow D, et al. CSF neuroactive steroids in affective disorders: pregnenolone, progesterone, and DBI. Biol Psych 1994;35:775-80 7. Roberts E. Pregnenolone from Selye to Alzheimer and a model of the pregnenolone sulfate binding site on the GABAa receptor. Biochem Pharmacol. 1995 Jan 6;49(1):1-16. 8. Guth L, Zhang Z, Roberts E. Key role for pregnenolone in combination therapy that promotes recovery after spinal cord injury. Proc Natl Acad Sci 1994;91:12308-12. 9. Wu FS, Gibbs TT, Farb DH. Pregnenolone sulfate: a positive allosteric modulator at the N-methyl-D-aspartate receptor. Mol Pharmacol 1991;40:333-6. 10. Sternberg TH, LeVan P, Wright ET. The hydrating effects of pregnenolone acetate on the human skin. Curr Ther Res 1961;3:469-71. 11. Morfin R, Young J, Corpechot C, et al. Neurosteroids: pregnenolone in human sciatic nerves. Proc Natl Acad Sci 1992;89:6790-3. 12. Darnaudéry M, Koehl M, Pallarés M, Le Moal MJ, Mayo W. The neurosteroid preg- nenolone sulfate increases cortical acetyl- choline release: A microdialysis study of freely moving rats. J Neurochem. 1998 Nov;71(5):2018-22. 13. Heydari B, Le Melledo JM. Low preg- nenolone sulfate plasma concentrations in patients with generalized social phobia. Psychol Med. 2002 Jul2;32(5):929-33. 14. Freeman, H., et al. Therapeutic efficacy of delta 5 pregnenolone in rheumatoid arthritis. JAMA 143: 338-44, 1950. 15. Hedman M, Nilsson E . Low blood and synovial fluid levels of sulpho-conjugated steroids in rheumatoid arthritis. Clin Exp Rheumatol. 1992 Jan-Feb;10(1):25-30. 16. Thiboutot D, Jabara S. Human skin is a steroidogenic tissue: steroidogenic enzymes and cofactors are expressed in epidermis, normal sebocytes, and an immortalized sebocyte cell line (SEB-1). J Invest Dermatol. 2003 Jun;120(6):905-14. 17. McGavack TH, Chevalley J, Weissberg J. The use of D 5-pregnenolone in various clinical disorders. J Clin Endocrinol 1951;11:559-77. 18. Pincus G, Hoagland H. Effects of administered pregnenolone on fatiguing psychomotor performance. Aviation Med 1944;April:98-115. 19. Gruber CJ, Huber JC. Differential effects of progestins on the brain. Maturitas. 2003 Dec 10;46 Suppl 1:S71-5.
Average Rating
Customer Reviews
Menopausal Support
2/27/2011
Reviewed by Cynthia O'Connor from New Jersey.
This supplement was recommended by my OB/GYN, who specializes in Anti-Aging medicine, and who has a holistic approach. She prescribed it to help me through the transitions of menopause.
Pregnenolone CRT tabs by Designs for Health
12/29/2010
Reviewed by Jackiem from South Plainfield, NJ.
Great product! Recommended by my Doctors to help me remember and be more alert!