The uncomfortable truth about your flat HRV
“Almost everyone I speak to is optimising the inputs. Very few are asking whether their cells still have the capacity to act on them.”
Everything is optimised except one thing
Training periodised. Sleep protected. Drink cut. Protein, creatine, magnesium, vitamin D. Every one of those is a behaviour or a raw material - an instruction sent to the cell, or a delivery made to it.
None of them change the cell's capacity to act on any of it. That is the layer nobody optimises, because no wearable reports on it. It is also the layer that decides what all the rest converts into.
HRV is not a fitness score
It measures the gap between consecutive beats. Wide, irregular gaps mean your nervous system is relaxed and running maintenance. Narrow, metronomic ones mean it is still braced.
That maintenance work is repair, and repair is cellular. Which makes HRV an output - and an output can only be as good as what funds it.
What actually declines
NAD⁺ is the coenzyme mitochondria use to make energy and repair enzymes need to clear damage. Two systems, one shared pool, both drawing hardest overnight. When supply is short, energy is paid first and repair takes what is left.
It declines steadily with age. By your forties you are doing the same work on roughly half the NAD⁺ you had at 25. Nothing has gone wrong. The budget shrank while the bill went up.
Blood NAD⁺ against participants' own baseline after 14 days of nicotinamide riboside supplementation.¹
The part you can change
Age is not negotiable. The input is. And unlike most things sold to people who train, this one lands somewhere you are already collecting data - your own overnight numbers, with months of baseline in them.
Which means you do not have to take anyone's word for it, including mine.
What moves the needle
Three things, in order:
Training you can absorb, and a sleep window you keep. Both raise the ceiling before anything else can.
Hard sometimes, not hard always. Repair has to be funded, and a permanent deficit is not a programme.
Nicotinamide riboside to produce NAD⁺, pterostilbene to protect it, CoQ10 and active B vitamins to spend it.
How MUTO works on the input
Three jobs, no overlap. Produce NAD⁺, protect it from being broken down as fast as it is made, and give the cell what it needs to spend it. Every dose is at the level used in the research it comes from and printed in full on the label.
Judge it on your own numbers
Log your 30-day HRV and resting heart rate average before your first capsule. If the trend has not moved by day 90, tell us and we refund you. No returned pouches, no argument about how you felt.
£29 for your first month, then £55
Up to 58% off the one-time price. Cancel any time. 90-day money-back guarantee.
¹ Conze, D., Brenner, C., & Kruger, C. L. (2019). Scientific Reports, 9(1), 9772. Blood NAD⁺ measured against participants' own baseline over 14 days of nicotinamide riboside supplementation.
MUTO is a food supplement and is not intended to diagnose, treat, cure or prevent any disease. It is not a substitute for training, sleep or a varied diet. If you are pregnant, breastfeeding or taking prescribed medication, speak to your doctor before use. Timings described are typical and not guaranteed; individual results vary.
