can L-Phenylalanine,L-Tourine,L-Tyrosine or L-Glycine cause a false pos in a urinalysis for Methamph

No.

Here is some information on substances that can cause false positive results for amphetamines or methamphetamine.

"... Methamphetamine is present in two different forms; “d” and “l”. Street
methamphetamine is predominantly d -Methamphetamine. The over-the-counter
medication, Vick’s Inhaler (and the Walgreen equivalent), contains exclusively the
“l” form of methamphetamine (the listed active ingredient is l-Desoxyephedrine,
another name for l -Methamphetamine). Although it is uncommon, the heavy use of
Vick’s Inhaler can cause a positive urine test for methamphetamine. The claim that
Vick’s Inhaler is the source of a positive methamphetamine test can be checked by
testing for “d” versus “l” methamphetamine. This test is performed by GC/MS.

False Positive Results: The following is a list of prescription and over-the-counter
drugs that can cause false positives for methamphetamine on an immunoassay
screen test (the list is not comprehensive and the following drugs are found in a
large variety of medications).

These drugs will NOT test positive for methamphetamine or amphetamine by LC/MS/MS.
*Ephedrine
*Pseudoephedrine (Sudafed)
*Phentermine
*Fenfluramine
*Phenylpropanolamine (PPA)
*Propranolol
*Phenmetrazine
*Thorazine (Chlorpromazine)
*Mephentermine
*MDMA (ecstasy)
*methylphenidate (Ritalin)
*Bupropion
*Mahuang Tea (or tea made from plants belonging to the ephedra family)... "

from norchemlab.com/main/drug_references/factsheets/amphe_metha.pdf