Evening and relaxation formulas are the hardest category on the shelf to compare honestly. Most of the ingredients are botanicals or amino acids with no Nutrient Reference Value, so the %NRV column that makes vitamin labels comparable is mostly dashes. Extract strengths are quoted inconsistently. Blends hide amounts. And because almost nothing in the category carries an authorised UK health claim, the marketing has to work hard elsewhere.
That does not make these labels unreadable. It means you have to know which numbers carry information. This guide goes through a five-ingredient evening formula line by line — our own, because we can quote it exactly — and explains what each figure tells you and what it cannot.
Why evening formulas are hard to compare
Three things make this category slippery. The first is the absence of reference values: ashwagandha, L-theanine, apigenin and lemon balm have no NRV, so the column that lets you calibrate a vitamin against a national reference is empty for most of the panel.
The second is extract arithmetic. A botanical can be quoted as raw herb powder, as an extract with a ratio such as 10:1, or as an extract standardised to a percentage of a marker compound. Those three numbers are not interchangeable, and 500 mg of one is not comparable to 500 mg of another.
The third is blends. If a label gives a single total for a proprietary complex, you cannot know whether the ingredient you care about makes up most of it or a token fraction. There are commercial reasons manufacturers do this. There is no reason you have to accept it.
Magnesium glycinate: the one ingredient with an authorised claim
Our panel states magnesium at 70 mg, which is 19% of the NRV, supplied as magnesium glycinate. Two details are worth pulling out.
The 70 mg is elemental magnesium — the mineral itself, not the weight of the glycinate compound. That is the figure the NRV percentage refers to, and it is the number to compare against another label's magnesium row. A product quoting a much larger figure for a magnesium compound in its marketing may be supplying a similar amount of actual magnesium.
19% is a contribution to the day's intake rather than the whole of it, and the label says so rather than rounding it up rhetorically. Magnesium carries authorised claims for contributing to normal energy-yielding metabolism, normal nervous system function, normal muscle function, normal protein synthesis, normal psychological function and the reduction of tiredness and fatigue. There is no authorised claim linking magnesium to sleep, and we do not make one.
Ashwagandha and the withanolide number
Ashwagandha, Withania somnifera, appears on our panel as 250 mg of root, with a second line directly beneath it: of which withanolides (5%), 10 mg.
That second line is where the information is. Withanolides are the marker compounds used to standardise ashwagandha extracts, and the percentage tells you the concentration of the extract you are being sold. Without it, a milligram figure could describe almost anything, from raw ground root to a highly concentrated extract. When you compare two ashwagandha products, compare the withanolide amounts rather than the headline milligrams.
There is no authorised UK health claim for ashwagandha. Whatever you have read about it elsewhere, a UK label may not attach a benefit to it, and this one does not.
There is also a safety point worth stating plainly. Case reports of liver injury associated with ashwagandha products have been published, and some European countries have taken a restrictive position on it. If you have any liver condition, are taking medicine that affects the liver, or notice symptoms such as unusual tiredness, abdominal pain, dark urine or yellowing of the skin or eyes, stop and seek medical advice. It is also not for use in pregnancy or breastfeeding.
L-theanine, apigenin and lemon balm
L-theanine, at 200 mg, is the largest botanical-derived amount on the panel. It is an amino acid found naturally in tea leaves. It has no authorised UK health claim, so the amount is published and nothing is attached to it.
Apigenin, at 50 mg, is a flavonoid found in chamomile and various other plants. No authorised UK health claim exists for it either. It also appears in our NMN formula, which is currently withheld from sale.
Lemon balm extract, Melissa officinalis, leaves, at 150 mg. Same position: an amount, a named plant part, and no claim.
Listing four ingredients in a row and saying nothing about what they do reads oddly if you are used to supplement copy. It is the only accurate way to present them. The amounts are exact and the plant parts are named so that if you want to look at the research yourself, you can check whether what you find matches what is actually in the capsule — which is frequently where marketing claims fall apart.
Proprietary blends and why amounts should be visible
A proprietary blend is a group of ingredients declared under one heading with a single combined weight. You will see it constantly in this category: an evening complex at 800 mg, with six ingredients listed underneath in descending order and no individual figures.
Descending order is the only information you get, and it is close to useless. A blend could be 780 mg of an inexpensive filler ingredient and 20 mg spread across the five that appear in the marketing. Both scenarios produce an identical label.
The counter-argument is that formulas need protection from copying. In a category where most ingredients are widely known and freely available, that argument does not carry much weight. Our panel gives an individual figure for every ingredient, including the withanolide sub-line, and any product that does not is asking you to take the interesting part on trust.
The two-capsule serving and the timing
This formula is a two-capsule serving with thirty servings per bottle. Every amount discussed above — 70 mg of magnesium, 250 mg of ashwagandha, 200 mg of L-theanine, 150 mg of lemon balm, 50 mg of apigenin — is the total from both capsules together, not from each one.
The directions specify taking the serving 30 to 60 minutes before bedtime, and they specify not taking a second serving in the same day. Both instructions are on the bottle rather than being suggestions from us, and the do-not-exceed statement is a labelling requirement for a reason.
One further practical caution: if it makes you feel drowsy, do not drive or operate machinery. That is standard advice for anything taken in the evening for the first time, and it is worth taking seriously on the first night rather than the second.
The cautions that matter most
Our label advises against use if you are taking antidepressants or other medication that affects serotonin levels. If that applies to you, check with your prescriber before buying, not after. This is the most important line on the bottle and it is easy to miss among the ingredient names.
Beyond that: the product is not suitable for children, and not for use in pregnancy or breastfeeding. Take medical advice before use if you have a liver condition, are taking any prescribed medicine, or have an upcoming operation — several botanicals are routinely stopped before surgery.
And the point that outranks the whole label: sleep problems lasting more than a few weeks deserve a GP appointment rather than a supplement. Persistent insomnia has an effective non-drug treatment pathway in the UK, and poor sleep is sometimes a signal of something that needs assessing properly.
A checklist for any evening formula
Whatever brand you are looking at, the same questions apply.
- Is every ingredient given its own amount, or is there a blend total hiding the split?
- For each botanical, is the plant part and the extract strength named? Root or leaf, ratio or standardised percentage.
- Is there a marker compound line such as withanolides, and what is the actual milligram figure?
- What is the serving size, and does the price per serving still look the same once you have checked?
- Are any claims being made that go beyond the authorised list? Sleep claims for botanicals are not authorised in the UK.
- Do the cautions cover medicines, pregnancy and children, and do any of them apply to you?
Frequently asked questions
Does ashwagandha have an authorised health claim in the UK?
No. There is no authorised UK health claim for ashwagandha, so a label or product page may state the amount and the plant part but may not attach a benefit to it. Any UK seller making a specific promise about what ashwagandha will do for your stress or your sleep is going beyond what the rules permit.
What are withanolides and why does the percentage matter?
Withanolides are the marker compounds used to standardise ashwagandha extracts. The percentage tells you how concentrated the extract is, which is the only way to compare two products meaningfully — 250 mg of a 5% extract supplies 10 mg of withanolides, and 250 mg of an unstandardised powder could supply very little. Compare the marker amount, not the headline weight.
Can I take an evening supplement alongside antidepressants?
Our label specifically advises against use if you take antidepressants or other medication affecting serotonin levels, so the answer for this product is to speak to your prescriber first. That applies more widely too: several botanicals used in evening formulas have potential interactions, and a pharmacist can check your specific combination in a couple of minutes.
How much magnesium is in a typical evening formula?
It varies enormously, and the number to look for is the elemental amount with its %NRV rather than the weight of the magnesium compound. Ours supplies 70 mg of elemental magnesium as the glycinate, which is 19% of the NRV. Some products supply considerably more and some considerably less; the panel is the only reliable place to check.
Before choosing a supplement
- Read the complete current label, including the active and the other ingredients.
- Compare the daily serving rather than the number printed on the front of the bottle.
- Add up every source of the same nutrient across your whole routine.
- Ask a pharmacist or qualified healthcare professional about medicines, pregnancy, breastfeeding, surgery or an existing condition.
- Remember that food supplements do not replace a varied, balanced diet and a healthy lifestyle.
Related guides on this formula
- How to sleep better: an evening checklist that costs nothing
- Magnesium glycinate and other forms: how to read the label
View the Advanced Calm + Sleep label, the full ingredient panel and current purchase options.
Also useful: RevaHealth Journal · full range · Ingredients · Contact.
References and further reading
- NHS: Others — including magnesium
- GOV.UK: Great Britain nutrition and health claims register
- NHS: Insomnia
This article is general educational information, not medical advice. Food supplements are not medicines and are not intended to diagnose, treat, cure or prevent disease. Always read the complete physical label before use, and speak to your GP or pharmacist if you are unsure whether a supplement is right for you.
