Proprietary Blends, Explained: What The 151mg Total Actually Hides

By the Memocept Wellness Desk · August 6, 2026 · 6 min read

What FDA labeling rules actually require

Under FDA dietary supplement labeling rules, a proprietary blend must list every ingredient it contains, in descending order by weight, along with the combined total weight of the entire blend. What it does not require is disclosing the individual weight of each ingredient within that total. Both approaches are legal; they simply provide different levels of detail to the buyer.

Why 'descending order by weight' still leaves a lot unknown

Memocept's blend lists ingredients in this order: caffeine from green coffee, L-Tyrosine, Theacrine, Theobromine, Bacopa monnieri, Rhodiola rosea, Huperzine-A. By convention, this suggests caffeine is present in the largest amount and Huperzine-A in the smallest — but the actual gap between any two ingredients could be enormous or negligible, and there is no way to know from the label alone.

The 151mg ceiling is the real limiting factor

How to evaluate a proprietary blend fairly

Look at three things: the total blend weight, the ingredient order (which suggests but does not prove relative amounts), and whether comparable non-proprietary-blend products exist that disclose full amounts for a similar price. None of these substitute for actual disclosed numbers, but together they give you a more informed guess than the marketing copy alone.

Applying this to Memocept

Memocept's 151mg proprietary blend is legally compliant and follows standard industry practice, and its three B vitamins are a genuine transparency positive by contrast. Whether the blend total is sufficient for any individual ingredient to work as intended in the underlying research is a question the label itself cannot answer.