On the other hand, natural bioidentical progesterone can be extracted from the wild yam. This is a little bit more complicated and expensive. However, the progesterone from wild yam does not cause the type of side-effects the progestin did. Plus, natural progesterone cream from the wild yam is vegan. Many companies will add vitamin E and other healthy fats that can be absorbed by the body. This benefits not only our hormonal health, but our heart and our whole body.
So using the example track above, the right ear is sent a 20Hz beat, compared to a 10Hz beat in the left ear.  As the right ear receives the higher frequency of beat, this works to increase the speed of the ‘left' brain hemisphere, which can be helpful for people with conditions like ADD, who are often found to have an abundance of slow wave activity in the left brain.

Proceedings of the 9th Conference on Interdisciplinary Musicology – CIM14. Berlin, Germany 2014 BINAURAL AUDIO RELAXATION TECHNIQUES FOR PEOPLE WITH ANXIETY AND STRESS Geraldine Molina, Emilia Sainz, Levi Serrano, Santiago Rentería, Diana Urquiza Instituto Tecnológico y de Estudios Superiores de Monterrey, Campus Santa Fe Correspondence should be addressed to: rosas_ger@hotmail.com, dianauf@itesm.mx Abstract: Since the beginning of the 21st century, there has been a great development in different studies related to encephalography and the psychological consequences of binaural audio. The objective of this paper is to analyze the effects of binaural audio as a relaxation method for people that suffer anxiety and stress. The study took place at ITESM, Santa Fe Campus, where twenty participants around 21 years old took part of the study. They were divided into two groups, Experimental and Control. The first one listened to the Theta binaural stimuli and the second one listened to a stimulus with nature sounds (birds and wind). The results show that the experimental group got to conscious relaxation. The control group had an unconscious relaxation (sleep), but when the stimuli stopped they recovered their stress level, for some participants it increased. 1. BACKGROUND At the end of the 19th century, Pierre Janet, a French psychologist, discovered that his patients relaxed when they were exposed to rhythmic light patterns. Hans Berger showed in 1924 that brainwaves could be read and studied through an encephalogram [2]. The first studies were done using visual stimuli, while later studies were done using sounds [3]. Brainwaves are caused by changes in the electric tension between two points in the brain cortex. The electroencephalogram has been used to analyze neurophysiological relations that exist between mental states and brainwave frequencies. When somebody’s mental state changes from alert to somnolence, low amplitude and high frequency brain waves turn into high amplitude and low frequency [4]. 2. BINAURAL AUDIO Giuseppe Tartini discovered combination tones. These occur when two tones are heard at the same time and the listener perceives a third tone. The frequency of the third tone is calculated by the difference between the first two tones, as shown in equation 1. (∆   ) [8] (1) The superior olivary complex integrates the phase differences, which makes possible the perception of the third tone. For example, if the left ear hears a 400Hz tone and the right ear a 410Hz tone, the listener will perceive a 10Hz tone [9]. This third tone is also known as binaural frequency. The binaural frequency is directed from the superior olivary complex to the reticular formation and the brain cortex, where the electroencephalogram can read its effect. The Frequency Following Response (FFR) phenomenon happens when the frequency read by the encephalogram is equal to the combination tone frequency. When this happens, the frequency resonates in the brain stimulating the reticular formation inducing different psychological states. Brainwave bands and psychological consequences are shown in Table 1 [16]. Table 1: Brainwave Frequencies and Psychological Consequences Brainwaves Frequency (Hz) Amplitude (μV) Mental StateDelta 0.1 - 3 20-200 Consciousness is lost, sleep without dreams Theta 4 - 7 20-100 REM Sleep, meditation, and Creativity Alpha 8 - 12 20-60 Conscious Relaxation Beta 13 - 40 2-20 Concentration, Alert, and cognition (High levels are associated with anxiety) It has been proved that delta sound waves in binaural audio therapy have anxiolytic effects on patients with pre-surgery anxiety [7]. Theta binaural sound waves are also helpful with relaxation and anxiety reduction [11]. According to the results presented by the company Regus, in Mexico, 75% of employed people suffer from stress and anxiety. These cause social, health, and economic problems at the same time that productivity decreases [5]. According to the Mexican National Labor Organization, stress means that the GDP decreases from 0.5 to 3.5%. Stress leads to anxiety, irritability, fear, depression, suicidal thoughts, and lack of concentration. Some other symptoms are headaches, nausea, dizziness, muscular tension, insomnia, and tachycardia [6]. There are different techniques to induce relaxation like meditation. New relaxation techniques with binaural audio have been developed through Neurosciences. 3. OBJECTIVES • Evaluate and analyze binaural audio therapy effects (Theta frequencies) on people that suffer anxiety and stress (Students at ITESM), in order to induce relaxation and reduce anxiety. • Determine if the binaural therapy induced relaxation in the experimental group and compare the results to those from the control group. • Through the STAI test and the electroencephalogram results, determine which stimulus is more efficient. 4. HYPOTHESIS Hi: Frequency Following Response phenomenon will take place, as Delta and Theta bands will share frequencies with the combination tones. Hi: Beta brainwaves will show up when the stimulus begins, as they are related to concentration and alertness. 5. EXPERIMENT Twenty participants were randomly divided into two groups, control and experimental. The first group listened to sounds of

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From a brainwave entrainment effectiveness perspective, it’s my understanding that the response from isochronic tones stimulation starts to diminish over 30Hz and that 40Hz is about the limit for using them. So from what I’ve read on the topic a 100Hz beat wouldn’t work, probably because it’s too fast for the brain to process and synchronise with it.

When a person is under stress, more stress hormones are released and manufactured. Adaptogens help the adrenal glands respond more effectively and efficiently to the excess in hormones. When stress stops, adaptogens help the adrenal glands shut down more quickly. Adaptogens also support adrenal function by allowing cells access to more energy and preventing oxidative damage.
I wouldn’t personally recommend listening to delta wave frequencies for depression, so I’m not sure who advised you to do that? People with depression usually have a higher ratio of theta and delta wave activity, so I would normally recommend listening to high alpha wave and low beta wave frequencies, to help balance things. I have some 10Hz alpha tracks for serotonin release, which you can try for free on my YouTube channel here: https://www.youtube.com/watch?v=3NSUcuzpRcY&list=PLveg0IEcZWN6T86nhmSrdwG2kMQtcLRou. I also recommend you give these SMR (low beta wave) tracks a try: https://www.youtube.com/watch?v=HGTvBbrEwZQ&list=PLveg0IEcZWN7yaMaKr8F-eWHALk2_zGqY. I hope that helps.
These are lower frequency waves: The state is generated when our thoughts are really not concentrated and our minds wander freely, or we are in a relaxed state such as meditating or daydreaming. We also experience Alpha Brainwaves when we are gently busy with routine tasks like pottering in the garden, taking a shower, putting on makeup, doing light housework. Alpha is considered to be the bridge between the conscious mind and the subconscious mind.

Move your focus to the sole of your right foot. Tune in to any sensations you feel in that part of your body and imagine each breath flowing from the sole of your foot. After one or two minutes, move your focus to your right ankle and repeat. Move to your calf, knee, thigh, hip, and then repeat the sequence for your left leg. From there, move up the torso, through the lower back and abdomen, the upper back and chest, and the shoulders. Pay close attention to any area of the body that causes you pain or discomfort.

Stress levels and a proper diet are closely related. When we’re overwhelmed, we often forget to eat well and resort to using sugary, fatty snack foods as a pick-me-up. Try to avoid sugary snacks and plan ahead. Fruits and vegetables are always good, and fish with high levels of omega-3 fatty acids have been shown to reduce the symptoms of stress. A tuna sandwich really is brain food.
When delta waves are present, our awareness of the external world decreases and shuts off. People with ADD have problems with delta waves occurring when they are trying to focus, and focus and attention become increasingly impossible with stronger delta waves. Studies show a reduction of anxiety, improvements in insomnia, and elimination of headaches when people engage in sessions of delta brainwave entrainment.
Stress: In one randomized controlled trial with 108 participants, a single session of alpha and delta stimulation resulted in significantly less anxiety in surgical patients. Another session of theta stimulation resulted in improvement in certain measures of stress. Stimulation with certain frequencies of alpha and beta were reported to provide the most significant benefit for those who are stressed.
Deeper Meditation • Near The Stage Of Sleep • Vivid, Dreamlike Imagery • Creative Visualization • Feel More Open & Connected • Advanced Problem Solving • Super Creativity • Insight • Intuition • Inspiration • Deeper Subconscious To Super-Conscious Mind • Trance-like • GABA • Immune System • Serotonin • Endorphins • Acetylcholine • Lower Cortisol • Deeply Relaxed • Sleep Better • Emotional Intelligence

I personally believe in this type of sound. It works for me. Isochronic tones are the most powerful type of brainwave entrainment, utilizing equal intensity tones, increasing the pulse speed, and synchronizing your brain with the rhythm. Isochronics use a distinct and clean wave form which is designed to harmonize with the brain much more efficiently. Headphones are optional but recommended(from Healing Music CD and MP3).
An invigorating, brain-sharpening session, this audio starts at 14Hz, a beta feel-good frequency and SR harmonic. It then steps up in six-minute harmonic increments, gradually up to gamma 39Hz, leaving you feeling mentally stimulated and full of energy. A binaural beat track supports the main frequencies for those wearing headphones. Uplifting background music with embedded amplitude modulation provides a further layer of entrainment. Excellent for use as a morning alarm clock, ahead of a big night out, or to inspire those tired trips to the gym.