A study aimed to determine if severe cold exposure impairs human cognition and if dietary supplementation with amino acid tyrosine (TYR) would ameliorate such deficits. Volunteers (N=19) completed three test sessions on different days (35 degrees C control/placebo, approximately 10 degrees C/placebo, approximately 10 degrees C/TYR) using a double-blind, within subjects design. During each session, volunteers completed two 90-minute water immersions and consumed a food bar (150 mg/kg TYR or placebo) before each immersion (total TYR 300 mg/kg). The study demonstrated that cold exposure degrades cognitive performance and supplementation with TYR alleviates working memory decrements (1). Another study evaluated the effect of tyrosine supplementation on cognitive, psychomotor, and physical performance following a cold water immersion protocol that lowered body core temperature. Fifteen subjects completed a control trial (CON) in warm (35 degrees C) water and two cold water trials, each spaced a week apart. Subjects ingested an energy bar during each trial; on one cold trial (TYR) the bar contained tyrosine (300 mg/kg body weight), and on the other cold trial (PLB) and on CON the bar contained no tyrosine. The data of the study support previous findings that dietary tyrosine supplementation is effective for mitigating cold-induced cognitive performance such as working memory, even with reduced core temperature, and extends those findings to include the psychomotor task of marksmanship (2).
L-Tyrosine at 10-20 grams per day helps to decrease cognitive fatigue due to physically stressful situations (e.g. extended wakefulness, exposure to cold, excessive noise) (3) .
Eleuthero root at 0.91-6 g per day, is used in Herbal Medicine to help improve mental and/or physical performance after periods of mental and/or physical exertion and as a tonic to help relieve general debility or to aid during convalescence (4).
Panax ginseng root at 0.5-9 grams (0.008-0.27 grams total ginsenosides) per day is used in Herbal Medicine as a supportive therapy for the promotion of healthy glucose levels, to help support cognitive function and/or reduce mental fatigue (in cases of mental stress), and to help enhance physical capacity/performance (in case of physical stress) (5).
Licorice root and flower at 600-15,000 mg per day, is used in Herbal Medicine to help relieve inflammatory conditions of the gastrointestinal tract, such as gastritis in adults, and traditionally used in Herbal Medicine as an expectorant to help relieve chest complaints, such as catarrhs, coughs and bronchitis (6).
Lycopene not to exceed 30 mg per day provides antioxidants for the maintenance of good health and at 6.5-30 mg per day, helps to support prostate health (7).
Combination of vitamin A, lycopene, L-tyrosine and herbs
- Contains eleuthero, asian ginseng and licorice Ideal for vegetarians
- Convenient vegetable capsule format
Vitamin A (100% as beta-carotene): 5561 IU
Pantothenic acid: 50 mg
L-tyrosine: 150 mg
Eleuthero(Eleutherococcus senticosus): 125 mg
Asian ginseng (Panax ginseng): 125 mg
Licorice (Glycyrrhiza glabra): 100 mg
Lycopene(from Lycopersicon esculentum fruit): 2 mg
One capsule taken daily with a meal or as professionally directed.
If you are taking thiazide diuretics, cardiac glycosides, corticosteroids, stimulant laxatives or other medications which may aggravate electrolyte imbalance, do not use. If you have hypokalemia, high blood pressure, or a kidney or cardiovascular disorder, do not use. If you are pregnant or breastfeeding; or if you have diabetes, a liver disorder, or any type of acute infection, consult your healthcare practitioner prior to use. If you are following a low protein diet; or if you are taking antidepressants, blood thinners or digoxin, consult your healthcare practitioner prior to use. Some people may experience insomnia, anxiety, or headaches; in which case, discontinue use
Hypromellose, silica, vegetable magnesium stearate
Safety-sealed for your protection and for product freshness. Do not use if outer seal is missing or broken. Store in a cool, dry place.