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The primary difference between ordinary thiamine and TTFD is an extra chemical group called a mercaptan group
Testosterone levels naturally decline by about 1-2% per year after age 30, which can impact strength, energy, libido and body composition
Paccou J, Hardouin P, Cotten A, Penel G, Cortet B
The main concern is a rare, serious condition called non-arteritic anterior ischemic optic neuropathy (NAION)
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