Enter your information
The more you tell the calculator, the more personalised your recommendations become. Every input here actively adjusts your supplement doses and projected outcomes.
Statin status
Statin therapy depletes CoQ10, which makes Ubiquinol essential rather than optional. If you have tried a statin and reacted badly, prescription alternatives are shown further down.
Which applies to you?
Your lipid panel & HbA1c
Slide each value to match your most recent blood test results. Supplement doses for omega-3, plant sterols, psyllium and berberine adjust dynamically.
Advanced blood markers (optional)
Enter values from your full blood panel for finer personalisation. Each input shows what your value means clinically, and supplement doses adjust accordingly.
Click to show / hide marker inputs If left empty, supplements default to safe baseline doses
Calculated values
Total cholesterol, non-HDL, and TC/HDL ratio are derived from your inputs above.
Your personal LDL goal may be much tighter than these bands suggest
ACC/AHA 2026 Dyslipidaemia GuidelineThe "Optimal < 2.6 mmol/L" band on the LDL slider above reflects the general-population healthy threshold. But the 2026 ACC/AHA dyslipidaemia guideline (and the EAS/ESC 2019, and broadly NICE NG238) all set risk-stratified LDL goals that are much tighter when established disease, subclinical plaque, or major risk factors are present. If any of the conditions below apply to you, the "Optimal" badge on the slider above is not the right target for you personally:
Integrated atherosclerotic risk picture
How is this calculated? — methodology & evidence
This card synthesises your blood markers across the three independent biological axes that drive atherosclerosis. It is not a diagnosis of plaque or arterial disease — only direct imaging (CAC score, CT angiography, carotid IMT) can establish whether plaque is actually present. What this card does is integrate your biomarker pattern to estimate how favourable or unfavourable your current biological environment is for plaque formation and progression.
The three-axis model
Modern preventive cardiology recognises three largely independent contributors to residual cardiovascular risk:
- Atherogenic particles (the "bullets") — the lipoprotein particles that physically deposit cholesterol into the arterial wall. ApoB is the gold-standard measure (it counts the actual number of atherogenic particles); LDL-cholesterol is a reasonable proxy when apoB isn't available; non-HDL captures the full atherogenic burden including remnants. When apoB is entered, this card uses it preferentially over LDL.
- Metabolic / glycation environment (the "fuel") — captured by the TG/HDL ratio (a powerful marker of insulin resistance and small-dense LDL pattern) and HbA1c (the canonical clinical proxy for advanced glycation end-product burden). Elevated TG/HDL signals that even a "normal" LDL number may be misleading, because the LDL particles are likely small, dense, and disproportionately atherogenic. Elevated HbA1c indicates glycation-driven arterial stiffening that progresses even below the diabetic threshold.
- Inflammation (the "ignition") — captured by hs-CRP. Without inflammation, even high apoB rarely produces rapid plaque progression; with high inflammation, even modest apoB drives accelerated disease. The CANTOS trial established this axis as mechanistically independent of cholesterol — anti-inflammatory therapy reduced events with zero change in LDL or apoB. The 2025 ACC consensus statement formally elevated hs-CRP to a core residual-risk biomarker.
Why LDL and apoB are treated as causal
You may have read commentary questioning whether LDL really "causes" heart disease, or whether it's just correlated with it. The current scientific consensus is firmly on the causal side, and the strongest evidence is not from dietary trials (which are notoriously confounded) — it is from Mendelian randomisation studies. People who carry naturally-occurring genetic variants that lower lifetime LDL (for example, PCSK9 loss-of-function mutations, or specific HMGCR variants) show dramatic reductions in coronary disease — proportional to the LDL difference, independent of diet, behaviour, or anything else that could confound an observational study. The same effect appears across multiple independent gene variants in the LDL pathway, which is the genetic-epidemiology gold standard for inferring causation. This is also why statins, PCSK9 inhibitors, ezetimibe and bempedoic acid — which all lower LDL through different mechanisms — all reduce CV events: the common mechanism is the LDL reduction itself. The same Mendelian-randomisation evidence base applies to apoB (atherogenic particle count) and Lp(a). It is genuinely settled science that lifetime LDL/apoB exposure causes atherosclerosis; what remains genuinely debated is how strongly modest dietary changes affect that exposure in any given individual. See the saturated fat explainer in section 13 for the related dietary nuance.
The two time horizons — short-term vs. lifetime
Not all the inputs operate on the same clock. This is a subtle but clinically important point:
- Short-term (5–10 year) drivers: LDL, apoB, TG/HDL, HbA1c, hs-CRP. These reflect modifiable biology that responds to diet, exercise, sleep, and pharmacology within weeks-to-months. They drive the 5–10 year risk that QRISK3 and SCORE2 calculate.
- Lifetime (40+ year) drivers: Lp(a), APOE genotype. These are genetic — fixed at conception and largely unmodifiable by lifestyle (although lifestyle still matters because the rest of the system is still in play). A young person with elevated Lp(a) and otherwise clean biomarkers is not at high 5-year risk, but is at elevated lifetime risk and should be treated as such — particularly for calcific aortic valve disease, where Lp(a) is uniquely causal. The Integrated Risk score weights Lp(a) lightly (max 2 points) because it cannot drive short-term events on its own, but its presence should be a permanent reminder that the lifetime trajectory needs intensive control of the modifiable axes.
- The direct measurement (any-horizon): CAC sees plaque that has actually accumulated to date — regardless of which axis drove it.
The scoring system
Each axis contributes points to a composite score. The axes use the same evidence-based thresholds your tool already applies elsewhere — there is no "new" cutoff being introduced, only a way of combining them:
- Atherogenic-particle axis (0–3 points) — from apoB if entered (≥1.3 g/L = 3, 1.0–1.3 = 2, 0.8–1.0 = 1, <0.8 = 0); otherwise from LDL (≥4.1 = 3, 3.4–4.1 = 2, 2.6–3.4 = 1, <2.6 = 0).
- Metabolic axis (0–3 points) — combines TG/HDL ratio (in mmol/L: ≥1.74 = 2, 0.87–1.74 = 1, <0.87 = 0) plus HbA1c (≥48 mmol/mol = 2, 39–48 = 1, <39 = 0), capped at 3.
- Inflammation axis (0–2 points, optional) — hs-CRP if entered (≥3 mg/L = 2, 1–3 = 1, <1 = 0). When not entered, this axis contributes nothing to the score but is flagged as missing.
- Lifetime genetic load (0–2 points, optional) — Lp(a) if entered (>125 nmol/L = 2, 75–125 = 1, <75 = 0). Weighted lightly because it drives lifetime not short-term risk.
- APOE ε4 amplifier — adds 1 point when an ε4 allele is present and the atherogenic-particle axis is already scoring 2+ (because ε4 carriers respond more strongly to elevated saturated fat / LDL).
- CAC direct-measurement override — when entered, takes precedence over all the above. CAC = 0 drops the score by 3 points (typically 1–2 bands); CAC 100–399 adds 2 points and clears biomarker discord; CAC ≥ 400 forces the score to a minimum of 8 (Very high band).
The total maps to bands: 0–1 Optimal, 2–3 Low, 4–5 Moderate, 6–7 High, 8+ Very high.
The discordance overrides
Raw point totals can hide clinically important patterns, so several overrides apply (in priority order — CAC supersedes biomarker discord):
- CAC = 0 (Power of zero) — direct imaging confirms no current calcification. Strongly overrides elevated biomarker risk for the next 5–10 years. The biomarker pattern still matters for lifetime trajectory, but the urgency drops dramatically.
- CAC ≥ 100 (Imaging-confirmed plaque) — direct imaging confirms plaque has accumulated. Overrides "low biomarker" reassurance because the disease is already present regardless of what blood markers suggest.
- Concordant low pattern — if your metabolic axis is optimal and hs-CRP is optimal (when entered), the card explicitly notes this. In this scenario, even a moderately elevated LDL is far less dangerous than it would appear in isolation, because the vessel wall is uninflamed and resistant to particle deposition.
- Residual cardiometabolic / inflammatory risk — if LDL or apoB is optimal but TG/HDL, HbA1c, or hs-CRP is elevated, the card flags that the standard lipid panel is understating your true risk. This is the pattern most often missed in conventional GP screening.
- Multi-axis elevation — when two or more of {metabolic, inflammation, atherogenic particles} are all elevated simultaneously, the band is bumped up one level, reflecting the multiplicative interaction documented in the literature (hs-CRP × apoB, HbA1c × overweight × hs-CRP).
What this card cannot tell you
This is a biomarker pattern, not a 10-year absolute risk percentage. Tools like QRISK3 (UK), SCORE2 (Europe), and the Pooled Cohort Equations (US) calculate absolute risk using age, sex, blood pressure, smoking, and a single lipid measure — and remain the appropriate first-line risk calculators for treatment decisions. What this card adds is mechanistic insight: which biological axis is driving any risk you have, and therefore which intervention will move the needle most. If you want a true risk-of-event-by-2035 number, use QRISK3 alongside this.
Without CAC entered, this card cannot tell you whether plaque is already present. A normal CAC score in a "high risk" biomarker pattern is a much stronger argument for caution before pharmacology than any blood test could provide; conversely, a high CAC score in a "low risk" biomarker pattern is a non-negotiable call to act. The biomarker pattern is the fire-conditions report; the CAC scan is the building inspection. Both can be useful — but where they disagree, the building inspection is what counts.
Deeper context What is "remnant cholesterol" and why does it matter?
The standard lipid panel reports four headline numbers — total cholesterol, LDL, HDL, and triglycerides. The atherogenic-particle story has historically been told almost entirely through LDL. But there is a third population of cholesterol-carrying particles that the standard panel does not name explicitly, and that the lipidology literature now treats as a major independent driver of cardiovascular risk: the cholesterol carried inside triglyceride-rich lipoprotein (TRL) remnants — colloquially "remnant cholesterol".
What it actually is
Your liver and intestine release two large lipoprotein classes — VLDL (very low-density lipoprotein, from the liver) and chylomicrons (from the intestine after a fatty meal). Their primary cargo is triglycerides, which they deliver to muscle and adipose tissue as fuel. As they shed triglycerides at each delivery, they shrink into cholesterol-rich husks — these are the "remnants". In a metabolically healthy person the liver clears these remnants rapidly via the LDL receptor and LRP1. In someone with insulin resistance, obesity, hypertriglyceridaemia, or an APOE ε2 genotype, remnant clearance is impaired and these particles accumulate in circulation, lingering long enough to cross the endothelium and deposit cholesterol into the arterial wall.
Critically, remnant particles are smaller than 70 nm — small enough to cross the endothelial layer directly — and they carry substantially more cholesterol per particle than a single LDL. They also drive vascular inflammation and foam-cell formation in their own right. This is why elevated remnant cholesterol is now classified alongside LDL-C and Lp(a) as a causal (not merely associated) risk factor for atherosclerotic cardiovascular disease.
How to calculate it from your panel
This is what the new card in Section 3 calculates from your inputs. No new blood test is required — you already have the numbers. The value you see is your calculated remnant-C; a direct laboratory measurement (which captures additional overlooked individuals at risk per Varbo & Nordestgaard 2021) exists but is not routinely available on the NHS.
Interpretation bands
1.0–1.3 mmol/L (~39–50 mg/dL) — Borderline. Worth addressing through diet, weight, and alcohol moderation before considering pharmacology.
> 1.3 mmol/L (> ~50 mg/dL) — Elevated. Independently associated with substantially increased risk of myocardial infarction, ischaemic stroke, peripheral artery disease, and cardiovascular mortality even when LDL is at target.
Note: these are the same cutoffs reflected in your tool's existing triglyceride bands. That is not a coincidence — triglycerides and remnant cholesterol are mechanistically coupled, and elevated TG is the single most reliable population-level proxy for elevated remnant-C. If your TG number is high, your remnant-C will be high; if your remnant-C is high in this card, your TG number is likely the proximate cause.
Why this matters even when LDL is at target
The 2024 Nordestgaard meta-regression of 29 statin trials covering 191,202 participants quantified this directly: when statins reduce LDL by 20%, they reduce remnant cholesterol by only about 12% — meaning statin-treated patients can be at their LDL target while still carrying substantial residual remnant-cholesterol risk. In a Frontiers in Cardiovascular Medicine analysis, ~12% of patients with established cardiovascular disease had elevated remnant cholesterol despite hitting their LDL goal. In a cohort of 113,000 people, those with low LDL but high remnant cholesterol still had a 15% higher stroke risk.
This is the mechanism behind the term "residual cardiometabolic risk" — the risk that remains after LDL has been lowered to guideline targets. Your Integrated Risk card in Section 3 already captures this conceptually via the TG/HDL metabolic axis; the remnant-C number is the direct biochemical expression of that same axis.
What lowers remnant cholesterol (in order of evidence strength)
- Reduce refined carbohydrate and added sugar. The most direct intervention. Hepatic de novo lipogenesis converts excess carbohydrate into triglycerides, which are then packaged into VLDL particles. Lower the carbohydrate substrate and you cut VLDL secretion at the source — within weeks, not months. The CGM section (Section 9) shows you which carbohydrates spike your particular physiology.
- Substitute Mediterranean fats for saturated fats. Olive oil, avocado, walnuts, and oily fish do not raise VLDL secretion the way saturated fats and refined carbohydrate do. The MIND/Mediterranean dietary pattern has the strongest population-level evidence here.
- Soluble fibre — particularly β-glucan and psyllium. Oats (soaked overnight to maximise β-glucan release), barley, and psyllium husk form a gel in the gut that binds bile acids and slows the absorption of dietary fat and cholesterol. This forces the liver to pull cholesterol from circulation to make new bile acids, lowering all atherogenic fractions including remnants. Effect size: ~5-10% reduction in atherogenic cholesterol with daily intake.
- Weight loss — especially visceral fat reduction. Visceral adipose tissue is metabolically active and exports free fatty acids directly to the liver, driving VLDL overproduction. Even 5–10% weight loss can produce a disproportionately large drop in triglycerides and remnant-C. BMI alone misses this — waist circumference and visceral fat are more relevant.
- Reduce alcohol. Ethanol is preferentially metabolised by the liver into fatty acids and packaged into VLDL. Even moderate intake raises triglycerides measurably. The current WHO position is that no level of alcohol is safe; from a strict remnant-cholesterol perspective, less is always better.
- High-dose marine omega-3. Prescription-grade icosapent ethyl (pure EPA, REDUCE-IT) reduced cardiovascular events on top of statin therapy in patients with persistent elevated triglycerides — a population characterised by elevated remnant-C. The mechanism is partly TG-lowering (~20-30% reduction at 4g/day) and partly direct plaque stabilisation.
- Exercise — especially Zone 2 aerobic. Skeletal muscle is the largest site of TG clearance via lipoprotein lipase. Regular aerobic exercise upregulates LPL activity and improves remnant clearance. Resistance training expands the glucose-disposal capacity that prevents postprandial VLDL surges in the first place.
- Pharmacological options. Statins lower remnant-C modestly (~12% per 20% LDL reduction). Fibrates and high-dose omega-3 are more targeted. A new generation of agents — ANGPTL3 inhibitors, apoC-III antisense oligonucleotides — can cut remnant-C by 50–80% in trials but is not yet widely available. All of this is a GP/lipidologist conversation, not a self-prescription.
How remnant-C sits alongside the other markers in this tool
Think of it as the missing fourth pillar of the atherogenic-particle story. Your tool's Integrated Risk card synthesises three axes — atherogenic particles (apoB / LDL), metabolic environment (TG/HDL, HbA1c), and inflammation (hs-CRP). Remnant cholesterol is the biochemical bridge between the first two: it is both an atherogenic particle population and a direct readout of metabolic dysfunction. A high remnant-C number with optimal LDL is the textbook "metabolically dyslipidaemic" pattern the standard panel misses — and the same pattern the reactive hypoglycaemia callout in Section 9 describes.
Start here — what you eat
Diet is the intervention with the largest effect on every number above, and the supplement tiers that follow work on top of it rather than instead of it. These are recommended maximums for the limiting nutrients and minimums for fibre — adjust to your activity level.
Order of priority
- What you eat, every day. Nothing below moves your numbers as much. If your results are poor and you change one thing, change this.
- Medication, where your numbers warrant it. If the panel above puts you in a treatment range, a statin or its alternatives will do more, faster, than any supplement on this page. That is a conversation with your GP, not a decision to make here.
- Supplements, last. The tiers below are genuinely useful and they are still third. They fine-tune a good diet; they cannot rescue a poor one, and they are not a substitute for treatment you need.
Total daily targets
Per-meal breakdown
| Meal | Carbs | Protein | Fat | Sat. fat | Fibre | Sugar |
|---|---|---|---|---|---|---|
| Breakfast | 50-65g | 25-30g | 15-20g | ≤5g | 8-10g | ≤6g |
| Lunch | 65-80g | 30-35g | 20-25g | ≤7g | 10-12g | ≤8g |
| Dinner | 65-80g | 30-35g | 20-25g | ≤7g | 10-12g | ≤8g |
| Snacks (combined) | 20-30g | 10-15g | 5-10g | ≤2g | 3-5g | ≤3g |
| Daily total | ~225g | ~100g | ~65g | ≤20g | ≥35g | ≤25g |
When you eat matters too
Hitting these targets is half the picture. How long you leave your liver between meals has a direct effect on hepatic triglyceride content and insulin sensitivity — and shortening the eating window clears liver fat even without changing what is on the plate.
Tier 1 — Move the numbers
The core daily supplements with the strongest clinical evidence for cholesterol and cardiovascular health.
Choosing a multivitamin — what to look for, what to avoidClick to expand · Important checks before you buy any multi or "performance" supplement
Not all multivitamins are equal — and some commonly-included ingredients are actively harmful for cardiovascular health. The recommendation in Tier 1 below is for Lamberts Multi-Guard or Vitabiotics Wellman/Wellwoman (iron-containing or iron-free depending on your ferritin/transferrin status — see Tier 1). Before you swap to anything else, check the label against this list.
✓ A good multivitamin should contain
- Vitamin B12 (cyanocobalamin or methylcobalamin) — 2.5-25 µgB12 deficiency increases sharply with age: roughly 1 in 20 adults aged 65-74 are deficient, rising to 1 in 10 over 75. B12 is essential for methylation, homocysteine recycling, and nervous system function — and it's also a co-factor that omega-3 needs to work optimally for brain health.
- Vitamin B6 (pyridoxine or P-5-P) — 1.4-10 mgWorks with B12 and folate to control homocysteine. Inadequate B6 leaves homocysteine elevated regardless of B12/folate intake.
- Folate (folic acid or methylfolate / 5-MTHF) — 200-400 µgThe third pillar of homocysteine control. Methylfolate (5-MTHF) is preferable for the ~30-40% of the population with MTHFR variants. UK NHS recommends folic acid specifically for women planning pregnancy.
- Iodine — 100-150 µgThe UK RNI is 140 µg/day. Iodine is essential for thyroid hormone synthesis and brain development (see milk panel in Section 11). About 21% of UK women of childbearing age are deficient; the figure is higher in those who've reduced dairy.
- Vitamin D3 — 400-1000 IUUK adults need supplementation October-March. A multivitamin gives the baseline; the standalone Tier 1 D3 product gives the variable dose based on your blood level.
- Magnesium, zinc, selenium — modest dosesFoundation minerals for cardiovascular, immune, and metabolic function. Multi doses are typically appropriate; only supplement higher amounts if blood markers indicate deficiency.
○ Generally fine in multivitamin amounts (but not as standalone high-dose)
- Potassium — typically <100 mg in a multiMulti doses are biologically inconsequential. Standalone potassium supplements above 200 mg/day can be risky for anyone with kidney issues or taking ACE inhibitors / ARBs / potassium-sparing diuretics, but the trace amounts in a standard multi are not a concern.
- Vitamin E — 15-30 IU (food-equivalent) is fineMulti doses are safe. However, high-dose standalone vitamin E (200+ IU/day) is associated with increased all-cause mortality in meta-analyses, increased heart-failure risk in the HOPE and GISSI-Prevenzione trials, and amplified bleeding risk when combined with warfarin or aspirin. Don't add a separate "vitamin E 400 IU" capsule on top of your multi.
- Vitamin K1 (phylloquinone) — multi dosesK1 from a multi is generally fine even on warfarin, provided your intake stays consistent (warfarin dosing is calibrated to your regular K1 intake). It's K2 (MK-7) that's the problem — see the warning section below.
⚠ Warnings — check carefully or avoid
- L-carnitine (in "performance," "energy," or "men's" multivitamins)L-carnitine is widely marketed for muscle energy and fatty-acid metabolism, but the gut microbiota converts it into trimethylamine-N-oxide (TMAO) — a metabolite directly linked to atherosclerosis, foam-cell formation, impaired reverse cholesterol transport, and major adverse cardiac events. The 2013 Nature Medicine study (Hazen group) showed plasma L-carnitine independently predicts cardiovascular events in 2,595 subjects when concurrent TMAO is elevated. Avoid any multivitamin or "energy" supplement listing L-carnitine, acetyl-L-carnitine, or propionyl-L-carnitine if cardiovascular protection is your goal. Acceptable exception: short-term use under medical supervision for specific carnitine deficiency states.
- Vitamin K2 (MK-7) IF you are on warfarin or another vitamin K antagonistEven tiny doses of MK-7 (10-20 µg/day) reduce INR in roughly 60% of patients on warfarin or acenocoumarol — directly counteracting the anticoagulant effect and significantly raising clot risk. This is an absolute contraindication for VKA users. However, K2 (MK-7) is genuinely beneficial for vascular health in everyone else — it directs calcium away from arteries toward bones via Matrix Gla Protein activation. Newer DOACs (apixaban, rivaroxaban, edoxaban, dabigatran) do not interact with K2. Decision rule: on warfarin → avoid K2 supplements entirely; on a DOAC → K2 is fine; not on any anticoagulant → K2 100-180 µg/day is beneficial alongside vitamin D3.
- High-dose iron (above multivitamin amounts) without confirmed deficiencyIf your ferritin is >100 µg/L or your transferrin saturation is >30%, additional iron is at best wasted and at worst pro-atherogenic — excess iron catalyses LDL oxidation. Iron in a standard multi is fine for most adults; switch to the iron-free variant if blood markers show elevation. See the multivitamin card in Tier 1 below — it auto-adjusts based on your ferritin/transferrin inputs.
- Calcium standalone (above food + multi amounts)High-dose calcium supplementation without K2 and vitamin D3 to direct calcium correctly has been associated with increased coronary calcification in several meta-analyses. If you need calcium for bone health, pair it with vitamin D3 and (if not on warfarin) K2 (MK-7) so calcium is directed to bone rather than artery walls.
Direct lipid effect
Strongest evidenceRead the nutrition section above first. These three have randomised, dose-responsive evidence of a direct effect on lipid numbers and apply to almost anyone with a raised panel — but they are an addition to a good diet, not an alternative to one. Doses adapt to your inputs; with no blood marker entered, each defaults to a safe baseline.
Tier 2 — Triggered by your inputs
Items where something specific in your data or your situation makes the case — a statin, a low level, a raised marker. When one of these is triggered it can matter more than anything in Tier 1.
Conditional on your situation
Depends on youThese are not a step up in sophistication — they are a step up in relevance to you specifically. Ubiquinol is close to essential on a statin and largely unnecessary off one. Vitamin D depends on your level and the season. Magnesium is shown by default for the reason set out on its card. TMG appears only if your homocysteine warrants it.
Tier 3 — Weaker evidence, optional
Plausible, low-risk, and genuinely optional. Nothing here has the outcome data of Tier 1, and none of it compensates for skipping Tier 1.
Nice to have, not load-bearing
OptionalTwo things worth being straight about. A multivitamin sits here rather than in Tier 1 because, while it is sensible insurance against dietary gaps, the trial evidence that multivitamins reduce cardiovascular events is weak to null — it is cover, not treatment. The polyphenols have real mechanistic interest and mostly surrogate-endpoint human data. Spend on Tier 1 first, and on food before any of it.
Projected 12-week outcomes
Three scenarios — supplements alone, plus the diet and meal-timing plan, and the full lifestyle stack with exercise on top. Estimates based on published meta-analyses; individual response varies considerably.
Supplements only
Take the recommended supplement stack consistently; diet unchanged. The realistic baseline for someone who isn't ready (or able) to overhaul their food yet.
Supplements plus diet & meal timing
Same supplements plus the daily nutrition targets, foods-to-eat-regularly list, milk-type switch, and 12+ hour overnight fast from the sections below. This is what is actually achievable with full lifestyle implementation.
Supplements plus diet plus exercise plan
Everything in Scenario B plus 150+ minutes per week of Zone 2 aerobic exercise, 2-3 resistance sessions, post-meal walks, and 7-9 hours of sleep — as described in Section 12. Exercise is the only meaningful lever for raising HDL, and resistance training expands skeletal-muscle glucose disposal capacity, indirectly suppressing hepatic triglyceride production.