can you put l carnitine in coffee L-Carnitine with Caffeine: Benefits, Side Effects & Best Time to Take ARS L-Carnitine Enzyme Black Coffee

Any change you observe could come from either component, or their interaction

It does not change your skin color dramatically, but helps in evening out skin tone, improving texture, and adding glow

In parallel to the finding of Wang et al., Gialluisi et al

doi: 10.1371/journal.pone.0107612 35 BogaertD.HermansP

The definitive test for sleep apnea is an overnight polysomnography, often called a sleep study. This test is done in a clinical laboratory setting and monitors the occurrence of apneas (paused breathing) and hypopneas (shallow and/or slow breathing) by measuring respiratory effort, breathing patterns, and blood oxygen saturation

Yes, there actually is cyanide in B12 supplements, but the scare about it is total nonsense