Are there any warnings or side effects when using Optimal Focus?

Warnings: 

Do not use Optimal Focus if you are currently taking medication for ADHD, antidepressants, or if you are pregnant. Children should consult their healthcare professional prior to use. Do not use it if tamper seal is damaged.

Cautions:

If a foggy head is experienced, then stop using Optimal Focus. Acetylcholine is a calming neurotransmitter and your brain is likely too calm. You likely need a more stimulating type of nutrient combination. Active B12 with L-5-MTHF Lozenges provide two nutrients which are known to support sympathetic neurotransmitters like dopamine, epinephrine and norepinephrine.†

If nausea is experienced, be sure to take it with food.  Acetylcholine is one of many neurotransmitters that is physiologically associated with nausea and vomiting. If taking with food still doesn’t resolve the nausea, consider reducing your dosage by half. If you were taking 1 capsule, consider ½ capsule (open and put on a bite of food). If taking 2 capsules, reduce to 1 capsule. If taking 3 capsules, consider reducing to 1 capsule.†

Source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8198651/

Optimal Focus may cause headaches in some people. Use only 1 capsule to start and, if benefits are experienced with only 1 capsule, continue with this amount. Do not take 2 or 3 capsules. If you experience headaches with Optimal Focus, avoid caffeine. Caffeine and acetylcholine are both natural vasoconstrictors in the brain . Headaches have many contributing causes. You may have a dirty NOS3 or a Fast MAOA (as discussed in the book, Dirty Genes. Please read those chapters to learn how to clean up your NOS3 and Fast MAOA genes.) Headaches from taking Optimal Focus may be supported with Serotonin Nutrients (supports a Fast MAOA) or PQQ Lozenge or Hydroxo B12 with Folinic Acid Lozenge (supports NOS3).†

Sources: https://link.springer.com/article/10.1134/S1819712417020131

† These statements have not been evaluated by the Food and Drug Administration (FDA). This product is not intended to diagnose, treat, cure, or prevent any disease.