L-tyrosine: available forms and which to choose
L-tyrosine in powder, capsules, in the form of N-acetyl-L-tyrosine and in pre-workout complexes: how the forms differ, what the research says and how to choose a quality product.
Training
Programs, exercise technique and load planning.
Who should not take L-tyrosine
Contraindications to L-tyrosine: hereditary metabolic disorders, the thyroid gland, MAO inhibitors, levodopa, melanoma, pregnancy. An analysis from the editors with an explanation of the mechanisms.
Myths about L-tyrosine
Seven common myths about L-tyrosine: "natural stimulant," fat burning, endurance, depression, NALT and "the more the better." What the research actually shows.
What to combine L-tyrosine with
What to combine L-tyrosine with: caffeine, L-theanine, carbohydrates, cofactors of catecholamine synthesis, and also combinations to avoid. An editorial analysis based on research.
5-HTP: what it is and how it works
5-HTP (5-hydroxytryptophan): what this substance is, how serotonin and melatonin are formed from it, how it differs from tryptophan, what it was studied for and what limitations it has.
The benefits of 5-HTP for athletes: the evidence base
Does 5-HTP help athletes: the serotonin hypothesis of central fatigue, data on endurance, appetite, sleep and recovery. A critical review of the evidence by the editors.
Side effects of 5-HTP
Side effects of 5-HTP: digestive disorders, drowsiness, serotonin syndrome, the eosinophilia-myalgia history, effect on tests. Mechanisms, signs and when to see a doctor.
How to take 5-HTP: dosage, timing, duration
How to take 5-HTP: the amounts used in studies, a gradual start, division into intakes, timing relative to food and sleep, course duration and breaks. A practical guide from the editors.
5-HTP: available forms and which to choose
Available forms of 5-HTP: capsules with standardized griffonia extract, enteric-coated tablets, combinations with B6, melatonin and plants, chewable forms. How to assess purity and choose a product.
Who should not take 5-HTP
Who should not take 5-HTP: antidepressants and other serotonergic drugs, bipolar disorder, Parkinson's disease, pregnancy, children, surgeries and tests. A list of contraindications with explanations.
L-tyrosine: available forms and which to choose
L-tyrosine in powder, capsules, in the form of N-acetyl-L-tyrosine and in pre-workout complexes: how the forms differ, what the research says and how to choose a quality product.
Who should not take L-tyrosine
Contraindications to L-tyrosine: hereditary metabolic disorders, the thyroid gland, MAO inhibitors, levodopa, melanoma, pregnancy. An analysis from the editors with an explanation of the mechanisms.