Amazon.com: pcoskey FertilMale Male Fertility Supplement for Sperm Motility & Count w L Carnitine, CoQ10, Zinc Natural, Vegan Made in USA, GMP Certified 90 Capsules : Health & Household Semen treatment with progesterone and or acetyl L carnitine does not improve sperm motility or membrane damage after cryopreserv Sperm health supplements & male prenatal vitamins Legacy l carnitine and l acetylcarnitine supplementation for idiopathic male infertility in: Reproduction and Fertility Volume 1 Issue 1 (2020) Remember to PLEASE talk with a provider to confirm supplements you should be taking. You do not need to be taking all of these.